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GDDBJ15-92-2013Technicalspecificationforconcretestructuresoftallbuilding20134和城鄉(xiāng)建設(shè)廳廣東省標(biāo)準(zhǔn)土結(jié)構(gòu)技術(shù)規(guī)程》的公告現(xiàn)批準(zhǔn)《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》為廣東省地方標(biāo)準(zhǔn),編號廢止。鄉(xiāng)建設(shè)廳負(fù)責(zé)管理,華南理工大學(xué)建筑設(shè)究院負(fù)責(zé)具體技術(shù)內(nèi)容的解釋。省住房和城鄉(xiāng)建設(shè)廳一三年四月一日前言JGJ3-200215-46-2005東省高規(guī)編寫的主要原則如下:1、強(qiáng)制性條文與國家行業(yè)標(biāo)準(zhǔn)《高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程》3-2010均一致。2、章節(jié)編排與(JGJ3-2010)基本一致,結(jié)構(gòu)構(gòu)件的構(gòu)造要求與(JGJ3-2010)基本保持一致,增列內(nèi)容:(1)“巨型框架-核心筒結(jié)構(gòu)”獨(dú)立成章;2控制;(算的時域顯式隨機(jī)模擬法。3列問題作改進(jìn)和調(diào)整:(1)材料:不限制剪力墻使用以上高強(qiáng)混凝土,提出對剪力墻使用高強(qiáng)混凝土的附加(單位層間位移角所需的水平力表達(dá);(3放松結(jié)構(gòu)層間位移角限值;(4僅控制結(jié)構(gòu)在偶然偏心地震作用下的扭轉(zhuǎn)位移比;(5結(jié)構(gòu)抗震性能設(shè)計的方法;(6不以調(diào)整結(jié)構(gòu)剛度來滿足樓層最小地震剪力要求;(7件地放松筒體剪力墻的軸壓比限值;-100%剪力;(9)對(JGJ3-2010)中一些未定量條文給出定量解釋,以方便操作;DBJ/T15-46-2005些條文,如樁基礎(chǔ)承載力計算的規(guī)定等。省高規(guī)中以黑體字標(biāo)志的條文為強(qiáng)制性條文,必須嚴(yán)格執(zhí)行。,郵編:,聯(lián)系人:,:1目次總則 1術(shù)語和符號 3術(shù)語 3符號 5 11 11材料 12 13 16 20 21 22 26 26 28 30 33 35 35風(fēng)荷載 35 40 51 51 53 54 56 57 59 62 62 63 66 70 76 81 81 83框架- 95 95 98 101 101框架- 103 104巨型框架- 107 107 107 109 109 109 116 117 117 118 122 122 124 126 127 136 136 138 139 144結(jié)構(gòu)隔震和消能減震振) 148 148 148 154 161 164 164 164 168 168 170 171 174 175 177 178 180 181 181 184附錄A樓蓋結(jié)構(gòu)豎向振動加速度計算 187附錄B廣東省基本風(fēng)壓與風(fēng)荷載體型系數(shù) 189附錄C時域顯式隨機(jī)模擬法 198附錄D墻體穩(wěn)定驗(yàn)算 207 209 圓形鋼管混凝土構(gòu)件設(shè)計 211 211 216 RC梁-圓鋼管混凝土柱節(jié)點(diǎn)環(huán)梁承載力設(shè)計方法 222 222 225 225 227本規(guī)程用詞說明 231引用標(biāo)準(zhǔn)名錄 2321ntentsGeneralProvisions·····································································································1TermsandSymbols···································································································2Terms············································································································2Symbols·········································································································3BasicRequirementofStructuralDesign···········································································7GeneralRequirement·························································································7Materials········································································································8HeightandAspectRatioLimitations·······································································8StructuralPlanLayout·······················································································10StructuralVerticalArrangement···········································································13DiaphragmSystem···························································································14LimitationsforStoryDriftandComfort··································································14StrengthDesignofMembers···············································································17SeismicDesignGradeofStructuralMembers···························································17RequirementforMembersofSpecialSeismicDesignGrade········································19Performance-basedSeismicDesignofStructures······················································20RequirementforPreventingStructuralProgressiveCollapse········································22LoadsandSeismicAction···························································································23Vertical··································································································Wind·····································································································SeismicAction································································································27StructuralAnalysis···································································································35GeneralRequirement························································································35Analysis··························································································AnalysisModeling···························································································37Second-OrderEffectsandStructuralStability···························································38Elasto-plasticAnalysisandCheckofStoryDriftofWeakand/orSoftStories·····················39EffectsofCombinationsofLoadsand/orSeismicActions············································40DesignofFrameStructure··························································································43GeneralRequirement························································································43StrengthDesign·······························································································43RequirementforDetailingofFrameBeams······························································46RequirementforDetailingofFrameColumns···························································49RequirementforSplicesandAnchoragesofReinforcement···········································53DesignofShearWallStructure·····················································································57GeneralRequirement························································································57StrengthDesignandDetailing··············································································58DesignofFrame-ShearWallStructure············································································67GeneralRequirement························································································67StrengthDesignandDetailing··············································································69DesignofTubeStructure····························································································71GeneralRequirement························································································71Frame-CoreWallStructure·················································································72TubeinTubeStructure······················································································73Mega-Frame-CoreStructure·······················································································75GeneralRequirement·······················································································75StrengthDesignandDetailing············································································75DesignofComplicatedTallBuildings···········································································76GeneralRequirement·······················································································76StructurewithTransferStory·············································································76StructurewithOutriggersand/orBeltMembers························································81StructurewithStaggeredStories··········································································81TowersLinkedwithConnectiveStructure······························································81StructurewithSetbackand/orCantilever·······························································82DesignofMixedStructures························································································85GeneralRequirement·······················································································85StructuralLayoutandArrangement······································································87Structural··························································································DesignofStructuralMembers············································································89DesignofBasementandFoundation·············································································95GeneralRequirement·······················································································95DesignofBasement························································································96DesignofFoundation······················································································97RequirementforDetailingofPile······································································100DesignofSeismicallyIsolatedandEnergy-dissipatedStructure···········································103GeneralRequirement·····················································································103SeismicallyIsolatedStructure···········································································103SeismicEnergy-dissipatedStructure···································································107WindVibrationControlStructure·······································································111ConstructionofTallBuilding···················································································113GeneralRequirement·····················································································113Surveying··································································································113Foundation·································································································115VerticalTransportation···················································································116ScaffoldandFalsework··················································································117Formworks·································································································117SteelReinforcement······················································································119Concrete····································································································120MassiveConcrete·························································································122MixedStructures························································································122ComplicatedStructures·················································································123ConstructionSafety·····················································································124HotWeatherandRainyWeatherConstruction·······················································124GreenConstruction······················································································126AppendixA CalculationoftheAccelerationofFloorVerticalVibration····································128AppendixBReferencewindPressureinGuangdongProvinceandWindPressureCoefficientsofBuilding·····························································129AppendixC Time-domainexplicitrandomsimulationmethod·················································136AppendixD CheckofStabilityofStructuralWall·······························································144AppendixE LateralStiffnessRequirementsforStoriesAdjacenttoTransferStory························148AppendixFDesignofConcreteFilledCircularSteelTubes···················································158AppendixGStrengthDesignofReinforcedConcreteRingBeamJointonConcreteFilledCircularSteelTubes····························································171ExplanationofWordinginThisSpecification······································································166ListofQuotedStandards·······························································································167為在廣東省的高層建筑混凝土結(jié)構(gòu)工程(包括鋼和混凝土的混合結(jié)構(gòu))的設(shè)計中做到安全適用、技術(shù)先進(jìn)、合理、方便施工,結(jié)合本省的設(shè)計經(jīng)驗(yàn)和工程實(shí)踐,制定本規(guī)程。本規(guī)程適用于層及10層以上或高度大于的住宅建筑,以及高度大于本規(guī)程不適用于建造在地震時易誘發(fā)山體滑坡、、潰壩等危險地段的高層建筑??拐鹪O(shè)防烈度為6提高抗震設(shè)防標(biāo)準(zhǔn),但不得降低抗震設(shè)防烈度。國家標(biāo)準(zhǔn)《建筑工程抗震設(shè)防分類標(biāo)準(zhǔn)》GB50223和《建筑抗震設(shè)計規(guī)范》GB50011的有關(guān)規(guī)定。注:本規(guī)程中甲、乙、丙類建筑分別為現(xiàn)行《建筑工程抗震設(shè)防分類標(biāo)準(zhǔn)》50223中特殊設(shè)防類、重點(diǎn)設(shè)防類、設(shè)防類的簡稱??拐鸷涂癸L(fēng)性能好且經(jīng)濟(jì)合理的結(jié)構(gòu)體系。殊要求時,可采用結(jié)構(gòu)抗震性能設(shè)計方法進(jìn)行補(bǔ)充分析和論證。文的規(guī)定。3 tallbuilding,high-risebuilding10層及10層以上或房屋高度大于28m的住宅建筑和房屋高度大于其他高層民用建筑。 buildingheight自室外地面至房屋主要屋面的高度,不包括突出屋面的電梯機(jī)房、構(gòu)架等高度。 framestructure和柱為主要構(gòu)件組成的承受豎向和水平作用的結(jié)構(gòu)。 shearwallstructure力墻組成的承受豎向和水平作用的結(jié)構(gòu)。 frame-shearwallstructure架和剪力墻共同承受豎向和水平作用的結(jié)構(gòu)。板-柱-剪力墻結(jié)構(gòu)slab-columnshearwallstructure梁樓板與柱組成的板柱框架和剪力墻共同承受豎向和水平作用的結(jié)構(gòu)。 tubestructure柱框架或壁式框架圍成的框筒以及由斜交叉桿系構(gòu)成的斜交網(wǎng)格筒等。 frame-corewallstructure心筒與外圍的稀柱框架組成的高層建筑結(jié)構(gòu)。 tubeintubestructure由核心筒與外圍框筒、網(wǎng)格筒等組成的高層建筑結(jié)構(gòu)。 mixedstructure,hybridstructure組成的框架筒結(jié)構(gòu)(筒中筒結(jié)構(gòu))。2.1.911轉(zhuǎn)換結(jié)構(gòu)構(gòu)件 transfermember完成上部樓層到下部樓層的結(jié)構(gòu)形式轉(zhuǎn)變或上部樓層到下部樓層結(jié)構(gòu)布置改變而設(shè)置的結(jié)構(gòu)構(gòu)件,包括轉(zhuǎn)換梁、桁架、轉(zhuǎn)換板等。 transferstory構(gòu)構(gòu)件所在的樓層,包括水平結(jié)構(gòu)構(gòu)件及其以下豎向結(jié)構(gòu)構(gòu)件。2.1.113加強(qiáng)層 storywithoutriggersand/orbeltmembers帶狀水平梁或桁架。 towerslinkedwithconnectivestructure(s)除裙樓以外,兩個或兩個以上塔樓之間帶有連接體(包括連廊)構(gòu)。 multi-towerstructurewithacommonpodium以上未通過結(jié)構(gòu)縫分開的裙樓上部具有兩個或兩個以上塔樓的結(jié)構(gòu)。 performance-basedseismicdesignofstructures構(gòu)抗震性能目標(biāo)為基準(zhǔn)的結(jié)構(gòu)抗震設(shè)計。 structuralseismicperformanceobjectives分別針對小震、、大震作用設(shè)定的結(jié)構(gòu)抗震性能水準(zhǔn)。2.1.18結(jié)構(gòu)抗震性能水準(zhǔn)structuralseismicperformancelevels構(gòu)震后損壞狀況及繼續(xù)使用可能性等抗震性能的界定。隔震結(jié)構(gòu)isolationstructure在建筑中設(shè)置隔震裝置而形成的結(jié)構(gòu)體系。包括上部結(jié)構(gòu)、層、下部結(jié)構(gòu)和基礎(chǔ)。消能減震結(jié)構(gòu)energydissipationstructure消能器的結(jié)構(gòu)。包括主體結(jié)構(gòu)和消能部件。 ——表示立方體強(qiáng)度標(biāo)準(zhǔn)值為20N/mm
——土彈性模量;
——彈性模量;fck、fc ——ftk、ft ——
——鋼筋強(qiáng)度標(biāo)準(zhǔn)值;fy、f'y ——
——柱箍筋的抗拉強(qiáng)度設(shè)計值;fyh、f ——Kh ——Ki ——結(jié)構(gòu)第iRa ——Rd
——水平地震作用標(biāo)準(zhǔn)值;F
——豎向地震作用標(biāo)準(zhǔn)值;
——地震作用時,結(jié)構(gòu)總重力荷載代表值;
——效總重力荷載代表值;M ——N ——
單樁的豎向力標(biāo)準(zhǔn)值;
——效應(yīng)或荷載效應(yīng)與地震作用效應(yīng)組合的設(shè)計值;
——荷載效應(yīng)標(biāo)準(zhǔn)值;
——活荷載效應(yīng)標(biāo)準(zhǔn)值;
——載效應(yīng)標(biāo)準(zhǔn)值;
——震作用標(biāo)準(zhǔn)值的效應(yīng);
——震作用標(biāo)準(zhǔn)值的效應(yīng);V ——
——風(fēng)壓;w10 ——重現(xiàn)期為10
——載標(biāo)準(zhǔn)值;F
——頂部附加水平地震作用標(biāo)準(zhǔn)值;u
——層間位移;θ ——結(jié)構(gòu)第iθE ——θp ——as、a's ——As、A's ——A
——墻水平分布鋼筋的全部截面面積;
——柱同一截面各肢箍筋的全部截面面積;A
——墻腹板豎向分布鋼筋的全部截面面積;——
——T形、面剪力墻腹板的面積;b —— ————L ————
——力作用點(diǎn)至截面重心的距離;
——考慮偶然偏心計算地震作用時,第質(zhì)心的偏移值;h ——
——有效高度;——
——房屋第距室外地面的高度;
柱的凈高;
——震設(shè)計時縱向受拉鋼筋的最小錨固長度;l
——鋼筋的基本錨固長度;l
——設(shè)計時縱向受拉鋼筋的基本錨固長度;l
——設(shè)計時縱向受拉鋼筋的最小錨固長度;
受拉鋼筋的搭接長度;
——凈跨;
——第i層平面平行地震作用方向的回轉(zhuǎn)半徑;s ——α —— ——α1 ——β ——β ——β ——zγ γ ——jγ ——γ ——γ ——γ γ ——γ ——η η1 η2 ηp ——ηc ——ηvc ——λ ——λv ——μ μN(yùn) ——μs ——μz ——ν ——ξ ——ξ ——ρsv ——ρv ——ρw ——ΨQ Ψw ——αlim λv EJd ——D ——第if T T ——T ——T ——ζ ——ζ ——ζ ——γ 承載力。用下,結(jié)構(gòu)經(jīng)修復(fù)后可繼續(xù)使用;在罕遇地震作用下,允許結(jié)構(gòu)有部分構(gòu)件屈服、破壞,但不應(yīng)倒塌。--等結(jié)構(gòu)體系。存在表3.1.4舉的平面或豎向不規(guī)則類型,屬于不規(guī)則結(jié)構(gòu)體系。 定義 層的彈性最大水平位移大于該樓層最大與最小位移平均值的 定義 樓板開洞后,有效樓板寬度小于開洞處樓面寬度的,或開洞面積大于該層樓面面積30%可不按開洞考慮。 80%,則該層的側(cè)向剛度不規(guī)則。層間位移角及側(cè)向剛度可按下式計算:θ=ui-ui-1=Δui i K 式中:ui、ui-1為第i層、i-1層水平彈性位移;hi為第i層層高;Vi為層剪力。 )不連續(xù)的類型分為:Ⅰ類:柱不連續(xù)。Ⅱ類:墻、支撐不連續(xù)。 70%80%進(jìn)行詳細(xì)的計算分析及論證(必要時進(jìn)行局部或整體結(jié)構(gòu)模型試驗(yàn))證結(jié)構(gòu)的抗震安全性?;炷翉?qiáng)度等級不應(yīng)低于,抗震設(shè)計時不宜低于抗震等級一級或特一級的豎向構(gòu)件混凝土強(qiáng)度不應(yīng)低于預(yù)應(yīng)力混凝土結(jié)構(gòu)的混凝土強(qiáng)度等級不宜低于轉(zhuǎn)換梁、柱等轉(zhuǎn)換結(jié)構(gòu)構(gòu)件的混凝土強(qiáng)度等級不宜低于除轉(zhuǎn)換層樓蓋外,現(xiàn)澆非預(yù)應(yīng)力混凝土樓蓋的混凝土強(qiáng)度等級不宜高于布筋的配筋率、對豎向受力鋼筋的約束,必要時可采用型鋼、鋼板或鋼管混凝土剪力墻。鋼筋宜優(yōu)先采用HRB400HRB500Q345GJQ390Q420制時可采用Q235材。的有關(guān)規(guī)定。按一、三級抗震等級設(shè)計的框架和斜撐構(gòu)件,其縱向受力鋼筋尚應(yīng)符合下列規(guī)定:鋼筋的抗拉強(qiáng)度實(shí)測值與屈服強(qiáng)度實(shí)測值的比值不應(yīng)小于鋼筋的屈服強(qiáng)度實(shí)測值與屈服強(qiáng)度標(biāo)準(zhǔn)值的比值不應(yīng)大于鋼筋最大拉力下的總伸長率不應(yīng)小于9%。鋼材的屈服強(qiáng)度實(shí)測值與抗拉強(qiáng)度實(shí)測值的比值不應(yīng)大于鋼材應(yīng)有明顯的屈服臺階,且伸長率不應(yīng)小于的最大適用高度應(yīng)符合表3.3.1-2定。 A級高度鋼筋混凝土高層建筑的最大適用高度(m)--注:1 框架結(jié)構(gòu)、板-柱-剪力墻結(jié)構(gòu),當(dāng)房屋高度超過本表數(shù)值時,結(jié)構(gòu)設(shè)計應(yīng)有可靠依據(jù),并采取有效的加強(qiáng)措施。l)- B級高度鋼筋混凝土高層建筑的最大適用高度(m)-注:1 甲類建筑,、7度時宜按本地區(qū)設(shè)防烈度提高一度后符合本表的要求,鋼筋混凝土高層建筑結(jié)構(gòu)的高寬比不宜超過表 7規(guī)則的平面布置。lmax足表3.4.3求。不宜采用角部重疊或細(xì)腰形等對樓蓋整體剛度削弱較大的平面(圖b/B不宜小于0.4;角部重疊部分尺寸與相應(yīng)邊長較小值的比值/Bmin不宜小于1/3 抗震設(shè)計的建筑結(jié)構(gòu)平面布置應(yīng)避免或減少結(jié)構(gòu)整體扭轉(zhuǎn)效應(yīng)。1.5不宜大于1.2,不應(yīng)大于1.4。當(dāng)樓層的層間位移角較小時,扭轉(zhuǎn)位移比限值可適當(dāng)放松。高層建筑的扭轉(zhuǎn)不規(guī)則程度分類按表3.4.4-13.4.4-2 A級高度建筑的扭轉(zhuǎn)不規(guī)則程度分類及限值<351000Ⅰ類Ⅰ類Ⅱ類1 <θE≤11000 500Ⅰ類Ⅱ類Ⅱ類-300Ⅰ類Ⅰ類Ⅱ類1 <θE≤11300 650Ⅰ類Ⅱ類Ⅱ類1600Ⅰ類Ⅰ類Ⅱ類1 <θE≤11600 Ⅰ類Ⅱ類Ⅱ類 B級高度建筑的扭轉(zhuǎn)不規(guī)則程度分類及限值結(jié)構(gòu)類型 μ 1.2<μ≤1.3 <.3-00Ⅰ類Ⅰ類Ⅱ類1 <θE≤11300 650Ⅰ類Ⅱ類Ⅱ類1600Ⅰ類Ⅰ類Ⅱ類1 <θE≤11600 Ⅰ類Ⅱ類Ⅱ類注:1扭轉(zhuǎn)位移比μ指樓層豎向構(gòu)件的最大水平位移與平均位移之比,計算時采用剛性樓板假定,并考慮偶然偏心響。2當(dāng)樓層的最大層間位移角不大于本規(guī)程第3.7.3條規(guī)定的限值的0.5倍時,該樓層扭轉(zhuǎn)位移比限值可適當(dāng)放松,但A級高度建筑不大于1.8B級高度不大于1.6算樓層的最大層間位移角時不考慮偶然偏心的影響。生的不利影響。有效樓板寬度不宜小于樓面寬度的;樓板開洞總面積不宜超過樓面面積的30%體的構(gòu)造措施,必要時可在外伸段凹槽處設(shè)置連系梁或連系板。平、復(fù)雜、嚴(yán)重不規(guī)則時,可設(shè)置防震縫將其劃分為較規(guī)則的幾個結(jié)構(gòu)單元。7高度5m4m和3m,宜加寬;項(xiàng)規(guī)定數(shù)值的50%,且二者均不宜小于100mm按較低的房屋高度確定。接,必要時可設(shè)置防撞墻。高層建筑結(jié)構(gòu)伸縮縫的最大間距宜符合表 注:1 框架-當(dāng)屋面無保溫或隔熱措施、混凝土的收縮較大或室內(nèi)結(jié)構(gòu)因施工外露時間較長時,伸縮縫間距應(yīng)適當(dāng)減小。每30~40m間距留出施工后澆帶,帶寬800~1000mm45上澆筑;的養(yǎng)護(hù)措施;逐漸均勻變化。樓層側(cè)向剛度不宜小于相鄰上層樓層側(cè)向剛度的90%樓層側(cè)向剛度可取樓層剪力與層間位移角之比。A級高度高層建筑的樓層抗側(cè)力結(jié)構(gòu)的層間受剪承載力不宜小于其相鄰上一層受剪承載力的80%,不應(yīng)小于其相鄰上一層受剪承載力的65%B度高層建筑的樓層層間抗側(cè)力結(jié)構(gòu)的受剪承載力不應(yīng)小于其相鄰上一層受剪承載力的。注:1樓層抗側(cè)力結(jié)構(gòu)的層間受剪承載力是指在所考慮的水平地震作用方向上,該層全部柱、剪力墻、斜撐的受載力之和。2 部樓層外挑時,上部樓層出挑后的水平尺寸1不宜大于下部樓層水平尺寸B的1.1倍(圖3.5.5c、d)。 樓層質(zhì)量沿高度宜均勻分布,樓層質(zhì)量不宜大于相鄰下部樓層質(zhì)量的不宜采用同一樓層剛度和承載力變化同時不滿足本規(guī)程第3.5.2條和3.5.3條規(guī)定的高層建筑結(jié)構(gòu)。樓層側(cè)向剛度變化、承載力變化、豎向抗側(cè)力構(gòu)件連續(xù)性不符合本規(guī)程第3.5.2、3.5.3、3.5.4條,該樓層應(yīng)視為薄弱層,其對應(yīng)于地震作用標(biāo)準(zhǔn)值的剪力應(yīng)乘以大系數(shù)。施。Ⅱ類豎向構(gòu)件不連續(xù)的梁式轉(zhuǎn)換層板厚不宜小于頂板及底板的板厚不宜小于150mm;Ⅰ類豎向構(gòu)件不連續(xù)時轉(zhuǎn)換層樓蓋板厚不應(yīng)小于120mm?,F(xiàn)澆預(yù)應(yīng)力混凝土板的厚度不宜小于層每方向的配筋率不宜小于0.25%結(jié)構(gòu)的水平位移應(yīng)按本規(guī)程第章規(guī)定的風(fēng)荷載、地震作用和第規(guī)定:/ /---柱-/和第2值線性插入取用。然偏心的影響。17~度時樓層屈服強(qiáng)度系數(shù)小于構(gòu);2筑;3的建筑結(jié)構(gòu);4房屋高度大于結(jié)構(gòu)。1)本規(guī)程表4.3.4所列高度范圍且不滿足本規(guī)程第定的豎向不規(guī)則高層建筑結(jié)構(gòu);2)7度Ⅲ、Ⅳ類場地和震設(shè)防的乙類建筑結(jié)構(gòu);3板--結(jié)構(gòu)。作用計算的樓層彈剪力的比值。θ
[θ]
(3.7.5p10%;當(dāng)柱子全高的箍筋構(gòu)造采用比本規(guī)程中框架柱箍筋最小配箍特征值大提高20%,但累計不超過25%h層高。 框架-核心筒結(jié)構(gòu)、板柱結(jié)構(gòu)點(diǎn)的順風(fēng)向和橫風(fēng)向振動最大加速度可按式3.7.6-13.7.6-2也可通過風(fēng)洞試驗(yàn)結(jié)果判斷確定,計算時阻尼比宜取0.010.02 α=ξν
μwAs 10mtot
3.7.6-1 ——順風(fēng)向頂點(diǎn)最大加速度(m/s
——載體型系數(shù); 50009標(biāo)準(zhǔn)《建筑結(jié)構(gòu)荷載規(guī)范》的規(guī)定采用;ξ、ν 東省標(biāo)準(zhǔn)《建筑結(jié)構(gòu)荷載規(guī)范》的規(guī)定采用;A ——
——建筑物總質(zhì)量(αtr
b BL=r2tiT γζt B t,cr
3.7.6-2b
=2.05×10
vTn,mL1BL
(kN/m3)
3.7.6-3 ——橫風(fēng)向頂點(diǎn)最大加速度(m/svn,m ——建筑物頂點(diǎn)平均風(fēng)速(
n,m
μwz 10
μz ——γ ——結(jié)構(gòu)所受的平均重力(kN/mζt,cr ——T ——結(jié)構(gòu)橫風(fēng)向第一階自振周期(B、 ——分別為建筑物平面的寬度和長度(鋼樓蓋結(jié)構(gòu)豎向頻率不宜小于8Hz不同使用功能、不同自振頻率的樓蓋結(jié)構(gòu),其振動峰值加速度不宜超過表豎向振動加速度可按本規(guī)范附錄計算時,輕鋼樓蓋結(jié)構(gòu)的阻尼比可取0.02,鋼混凝土組合樓蓋可取0.03,混凝土樓蓋可取0.04 注:樓蓋結(jié)構(gòu)豎向自振頻率為2Hz~4Hz值加速度限值可按線性插值選取。持久設(shè)計狀況、狀況
S≤R0d d
3.8.1-1狀況S≤R/γd d RE
(3.8.2-2 ——結(jié)構(gòu)重要性系數(shù),對安全等級為一級的結(jié)構(gòu)構(gòu)件不應(yīng)小于構(gòu)構(gòu)件不應(yīng)小于S ——作用組合的效應(yīng)設(shè)計值,應(yīng)符合本規(guī)程第5.6.15.6.4Rd ——γRE ——的承載力抗震調(diào)整系數(shù)應(yīng)按本規(guī)程第12.1.7條的規(guī)定采用。當(dāng)僅考慮豎向地震作用組合時,各類結(jié)構(gòu)構(gòu)件的承載力抗震調(diào)整系數(shù)均應(yīng)取為。 甲類、乙類建筑:應(yīng)按本地區(qū)抗震設(shè)防烈度提高一度的要求加強(qiáng)其抗震措施。當(dāng)建筑場地為Ⅰ許仍按本地區(qū)抗震設(shè)防烈度的要求采取抗震構(gòu)造措施。設(shè)防烈度降低一度的要求采取抗震構(gòu)造措施。類建筑的要求采取抗震構(gòu)造措施。A結(jié)構(gòu)的抗震等級應(yīng)按表3.9.3注:本規(guī)程特一級和一、二、三、四級即“抗震等級為特一級和一、二、三、四級稱。 A級高度的高層建筑結(jié)構(gòu)抗震等級-mm剪力墻位的剪力墻-m柱上板帶注:1 當(dāng)框架核心筒結(jié)構(gòu)的高度不超過時,其抗震等級應(yīng)允許按框架抗震設(shè)計時,級高度丙類建筑鋼筋混凝土結(jié)構(gòu)的抗震等級應(yīng)按表 B級高度的高層建筑結(jié)構(gòu)抗震等級結(jié)構(gòu)類型烈度部位剪力墻部位剪力墻-12本規(guī)程抗震等級最高為特一級。當(dāng)抗震等級要求提高一級時,已為特一級者可不再提高。具體情況采用三級或四級。本身確定抗震等級。甲、乙類建筑按本規(guī)程第3.9.1條提高一度確定抗震等級時,或Ⅲ、Ⅳ類場地且設(shè)計基本地震加速大適用高度,則應(yīng)采取比對應(yīng)抗震等級更有效的抗震構(gòu)造措施。的有關(guān)規(guī)定。柱端彎矩增大系數(shù)、柱端剪力增大系數(shù)vc應(yīng)增大20%向鋼筋構(gòu)造配筋率,中、邊柱不應(yīng)小于1.4%,角柱不應(yīng)小于1.6%梁端剪力增大系數(shù)vb應(yīng)增大梁端加密區(qū)箍筋最小面積配箍率應(yīng)比一級框架梁增大構(gòu)件承載力計算時,底層柱下端及與轉(zhuǎn)換層相連的柱上端的彎矩增大系數(shù)取矩增大系數(shù)ηc應(yīng)增大20%;柱端剪力增大系數(shù)ηvc應(yīng)增大20%;地震作用產(chǎn)生的柱軸力增大系數(shù)取1.80.03配箍率不應(yīng)小于1.6%;全部縱向鋼筋構(gòu)造配筋率不應(yīng)小于1.6%應(yīng)按考慮地震作用組合的剪力計算值的1.4用。筋率不小于0.4%約束邊緣構(gòu)件縱向鋼筋構(gòu)造配筋率不應(yīng)小于,配箍特征值宜增大鋼筋的配筋率不應(yīng)小于1.2%證。后損失和修復(fù)難易程度等各項(xiàng)因素選定。結(jié)構(gòu)抗震性能目標(biāo)分為、B、C、D等級,結(jié)構(gòu)抗震性能25定地震地面運(yùn)動下的結(jié)構(gòu)抗震性準(zhǔn)相對應(yīng)。 地震水準(zhǔn) 結(jié)構(gòu)抗震性能水準(zhǔn)可按表 注:“關(guān)鍵構(gòu)件”是指該構(gòu)件的失效可能引起結(jié)構(gòu)的連續(xù)破壞或危及生命安全的嚴(yán)重破壞;“普通豎向構(gòu)件是指“構(gòu)件”之外的豎向構(gòu)件;“耗能構(gòu)件”括框架梁、剪力墻連梁及耗能支撐等。不同抗震性能水準(zhǔn)的結(jié)構(gòu)設(shè)計在中、作用下可按下列規(guī)定進(jìn)行:第1S
+η(
S*
0.4S*
ξR
(3.11.3-1式中:Rk ——ξ ——承載力利用系數(shù),壓、剪取0.6;彎、拉取0.69S* 、
——為水平和豎向中震作用計算的構(gòu)件內(nèi)力標(biāo)準(zhǔn)值,不需乘以與抗震等級有關(guān)的增大η 1.05~1.15η=可取η=0.70.9第2性能水準(zhǔn)的結(jié)構(gòu)在中震作用下,結(jié)構(gòu)構(gòu)件的抗震承載力宜符合式(承載力利用系數(shù)ξ,壓、剪取0.67;彎、拉取0.77第2性能水準(zhǔn)的結(jié)構(gòu)在大震作用下,結(jié)構(gòu)構(gòu)件的抗震承載力宜符合式(3.11.3-2求:S
+η(
S**
0.4S**)
ξR
(3.11.3-2系數(shù);ξ——承載力利用系數(shù),壓、剪取0.83;彎、拉取。第3性能水準(zhǔn)的結(jié)構(gòu)在中震作用下,結(jié)構(gòu)構(gòu)件的抗震承載力宜符合式(利用系數(shù),壓、剪取0.74;彎、拉?。淮笳鹱饔孟?,豎向構(gòu)件的受剪截面宜滿足式(3.11.3-3V
+ηV**≤?fbh
(3.11.3-3式中:VGEk——重力荷載代表值作用下的構(gòu)件剪力標(biāo)準(zhǔn)值;?——剪壓比,取?=0.133第4性能水準(zhǔn)的結(jié)構(gòu)在中震作用下,結(jié)構(gòu)構(gòu)件的抗震承載力宜符合式(3.11.3-1取?=0.15。第5性能水準(zhǔn)的結(jié)構(gòu)在大震作用下,豎向構(gòu)件的受剪截面宜滿足式(3.11.3-3),取?=0.167。合表3.11.3求。 結(jié)構(gòu)體系 剪力墻結(jié)構(gòu)、框架-柱-墻結(jié)構(gòu)結(jié)構(gòu)的層間彈塑性極限位移角取結(jié)構(gòu)各層質(zhì)心處的彈塑性位移計算值。高度大于300m層建筑或特別復(fù)雜的結(jié)構(gòu),宜采用靜力及動力彈塑性分析進(jìn)行對比。靜力彈塑性分析宜采用倒三角形水平力分布模式,也可采用振型分解法的規(guī)定值。首層樓面施工荷載不宜小于。構(gòu)件承載力驗(yàn)算時,施工荷載的分項(xiàng)系數(shù)可取單位對施工荷載有特別要求時,可按其要求采用。施工組織設(shè)計時應(yīng)驗(yàn)算所采用的附墻式、外爬式塔吊等起重機(jī)械及其他施工設(shè)施對結(jié)構(gòu)的影響。屋面直升飛機(jī)機(jī)坪的等效均布活荷載可取5kN/m2。局部荷載標(biāo)準(zhǔn)值及其作用面積可按表4.1.5取 )2風(fēng)荷載標(biāo)準(zhǔn)值應(yīng)按下式計算:wk=βzμsμzw0 (4.2.1 ——風(fēng)荷載標(biāo)準(zhǔn)值(kN/m
——基本風(fēng)壓(kN/m),應(yīng)按本規(guī)程第4.2.2的規(guī)定采用;
——風(fēng)壓高度變化系數(shù),應(yīng)按本規(guī)程第4.2.3~4.2.4定采用;
——風(fēng)荷載體型系數(shù),應(yīng)按本規(guī)程第4.2.5規(guī)定采用;
——z高度處的風(fēng)振系數(shù),應(yīng)按本規(guī)程第4.2.6規(guī)定采用。基本風(fēng)壓應(yīng)按照現(xiàn)行國家標(biāo)準(zhǔn)《建筑結(jié)構(gòu)荷載規(guī)范》GB50009的規(guī)定采用。對風(fēng)荷載比較敏感的高層建筑,承載力設(shè)計時應(yīng)按基本風(fēng)壓的用。地面粗糙度應(yīng)分為四類:類指近海海面和海島、海岸、湖岸及沙漠地區(qū);指田野、鄉(xiāng)村、叢林、丘陵以及房屋比較稀疏的鄉(xiāng)鎮(zhèn)和城市郊區(qū);類指有密集建筑群的城市市區(qū);密集建筑群且房高的城市市區(qū)。 結(jié)構(gòu)荷載規(guī)范》GB50009或廣東省標(biāo)準(zhǔn)《建筑結(jié)構(gòu)荷載規(guī)范》的有關(guān)規(guī)定進(jìn)行修正。計算主體結(jié)構(gòu)的風(fēng)荷載效應(yīng)時,風(fēng)荷載體型系數(shù)可按下列規(guī)定采用:圓形平面建筑取 (4.2.5式中:——多邊形的邊數(shù)。高寬比/B不大于的矩形、方形、十字形平面建筑取1.41)V形、雙十字形、井字形平面建筑;2LH/B4建筑;3)高寬比H/B大于,長寬比L/B不大于1.5形、鼓形平面建筑。高層建筑結(jié)構(gòu)的順風(fēng)向風(fēng)荷載可按公式(4.2.1)計算,風(fēng)振系數(shù)zβ=1+2gIBz 10 z
4.2.6-1式中:φ(z)式中:g ——峰值因子,可取2.5I10 10mC0.120.14和0.39R ——Bz ——R=
π6ζ
x2
(4.2.6-2x
fkww
x
>5
(4.2.6-3式中:f1 ——
——地面粗糙度修正系數(shù),對、B、C類和D類地面粗糙度分別取1.28、1.0、0.54和0.26
——結(jié)構(gòu)阻尼比,對鋼結(jié)構(gòu)可取0.01,對有填充墻的鋼結(jié)構(gòu)房屋可取0.02,對鋼筋混凝土結(jié)構(gòu)可取0.05,混合結(jié)構(gòu)可取0.03~0.04結(jié)構(gòu)可根據(jù)工程經(jīng)驗(yàn)確定。構(gòu)的體型和質(zhì)量沿高度均勻分布時,可按下式計算:B=kHaρρ1φz xzμzz
(4.2.6-41 ——H 350m450m550mzρ——脈動風(fēng)荷載豎直方向相關(guān)系數(shù); ——k,a ——系數(shù),按表4.2.6-1 zVθ寬度B0)的比值;θV可按表4.2.6-2 /方向相關(guān)系數(shù)可按下式計算:ρ
H+
60e-H/60-60H
(4.2.6-5式中:H——建筑總高度();對A類、類、C類和D類地面粗糙度,的取值分別不應(yīng)大于300m350m450m550m方向相關(guān)系數(shù)可按下式計算:ρ
B+
50e-B/50-50B
(4.2.6-6式中:B——為結(jié)構(gòu)迎風(fēng)面寬度(),B≤2振型系數(shù)φ(z)可由結(jié)構(gòu)動力計算確定,計算時可僅考慮受力方向基本振型的影響;對于質(zhì)量和數(shù),該系數(shù)可參考類似條件的試驗(yàn)資料確定;也可通過風(fēng)洞試驗(yàn)確定。GB50009建筑結(jié)構(gòu)荷載規(guī)范》的有關(guān)規(guī)定。房屋高度大于200m設(shè)計建筑幕墻時,風(fēng)荷載應(yīng)按現(xiàn)行國家標(biāo)準(zhǔn)《建筑結(jié)構(gòu)荷載規(guī)范》GB50009或廣東省標(biāo)準(zhǔn)《建筑結(jié)構(gòu)荷載規(guī)范》、《玻璃幕墻工程技術(shù)規(guī)范》JGJ102、《金屬與石材幕墻工程技術(shù)規(guī)范》JGJ133的規(guī)定采用。當(dāng)相交角度大于o別計算各抗側(cè)力構(gòu)件方向的水平地震作用。地震作用下的扭轉(zhuǎn)影響。高層建筑中的大跨度、長懸臂結(jié)構(gòu),度(0.15g8ei=0.1732式中:ei——第i層質(zhì)心偏移值(,各樓層質(zhì)心偏移方向相同;
(4.3.3ri——i平面平行地震作用方向的回轉(zhuǎn)半徑。高層建筑結(jié)構(gòu)一般采用振型分解反應(yīng)譜法,除對稱且考慮偶然偏心的扭轉(zhuǎn)位移比不大于,均應(yīng)考慮扭轉(zhuǎn)耦聯(lián)振動的影響。底部剪力法。7~8的補(bǔ)充計算:1)建筑結(jié)構(gòu);2)表4.3.4、丙類高層建筑結(jié)構(gòu);3不滿足本規(guī)程第3.5.2~3.5.6建筑結(jié)構(gòu);4)本規(guī)程第定的復(fù)雜高層建筑結(jié)構(gòu);5)豎向分布特別不均勻的高層建筑結(jié)構(gòu)。注:當(dāng)某層單位面積的質(zhì)量平均分布密度為相鄰層的1.5上時,稱為質(zhì)量沿豎向分布特別不均勻。 7度和8度Ⅰ、Ⅱ類場地8度Ⅲ、Ⅳ類場地注:場地類別應(yīng)按現(xiàn)行國家標(biāo)準(zhǔn)《建筑抗震設(shè)計規(guī)范》50011的規(guī)定采用。采用時域顯式隨機(jī)模擬法計算彈性結(jié)構(gòu)的地震作用效應(yīng)時,可按本規(guī)程附錄型分解反應(yīng)譜法求得的底部剪力的算所得的結(jié)構(gòu)底部剪力的平均值不應(yīng)小于振型分解反應(yīng)譜法求得的底部剪力的。地震波的持續(xù)時間不宜小于建筑結(jié)構(gòu)基本自振周期的倍和15s0.01s0.02s輸入地震加速度的最大值可按表型分解反應(yīng)譜法計算結(jié)果的較大值。 時程分析時輸入地震加速度的最大值(cm/s((注:7度時括號內(nèi)數(shù)值用于設(shè)計基本地震加速度為0.15的地區(qū),此處g重力加速度。人工模擬地震波的持續(xù)時間不宜小于建筑結(jié)構(gòu)基本自振周期的倍和15s距可取0.01s0.02s。人工模擬地震波的數(shù)量不應(yīng)少于整系數(shù)不宜小于時域顯式隨機(jī)模擬法計算所得樓層剪力與振型分解反應(yīng)譜法計算所得樓層剪力的,振型分解反應(yīng)譜法計算得到的各樓層構(gòu)件內(nèi)力宜作相應(yīng)調(diào)整。組合值系數(shù)應(yīng)按下列規(guī)定采用:樓面活荷載按實(shí)際情況計算時??;按等效均布活荷載計算時,藏書庫、檔案庫、庫房取般民用建筑取0.5建筑結(jié)構(gòu)的地震影響系數(shù)應(yīng)根據(jù)烈度、場地類別、設(shè)計地震分組和結(jié)構(gòu)自振周期及阻尼比確定。其水平地震影響系數(shù)最大值αmax應(yīng)按表4.3.8-1;特征周期應(yīng)根據(jù)場地類別和設(shè)計地震分組按表4.3.8-2采用,計算罕遇地震作用時,特征周期應(yīng)增加0.05s注:周期大于6.0s筑結(jié)構(gòu)所采用的地震影響系數(shù)應(yīng)做專門研究。 0.080.120.230.340.500.72注:7度時括號內(nèi)數(shù)值用于設(shè)計基本地震加速度為0.15g區(qū)。 特征周期值Tg(s)Ⅰ0Ⅰ1ⅡⅢⅣⅠ0Ⅰ1ⅡⅢⅣ高層建筑結(jié)構(gòu)地震影響系數(shù)曲線(圖T(s)圖4.3.9 α—地震影響系數(shù);αmax—地震影響系數(shù)最大值;T—結(jié)構(gòu)自振周期;Tg—特征周期;γ—衰減指數(shù);1—直線下降段下降斜率調(diào)整系數(shù);2—尼調(diào)整系數(shù)。狀參數(shù)應(yīng)符合下列規(guī)定:1)直線上升段,周期小于0.1s2)水平段,自0.1s至特征周期的區(qū)段,地震影響系數(shù)應(yīng)取最大值αmax;3)曲線下降段,自特征周期至5倍特征周期的區(qū)段,衰減指數(shù)γ應(yīng)取0.9;4)直線下降段,自倍特征周期至6.0s的區(qū)段,下降斜率調(diào)整系數(shù)1應(yīng)取0.02。當(dāng)建筑結(jié)構(gòu)的阻尼比不等于時,地震影響系數(shù)曲線的分段情況與本條第和阻尼調(diào)整系數(shù)應(yīng)符合下列規(guī)定:1)曲線下降段的衰減指數(shù)應(yīng)按下式確定:γ=0.9+
0.05-ζ0.3+6ζ
4.3.9-1式中:γ——曲線下降段的衰減指數(shù);ζ——2)段的下降斜率調(diào)整系數(shù)應(yīng)按下式確定:η1
=0.02
(0.05-ζ4+32ζ
4.3.9-2式中:η——直線下降段的斜率調(diào)整系數(shù),小于時應(yīng)取0。3)阻尼調(diào)整系數(shù)應(yīng)按下式確定: 0.05-ζη=+2 0.08+1.6ζ式中:η2——阻尼調(diào)整系數(shù),當(dāng)小于0.550.55。
4.3.9-3作用效應(yīng)的計算:結(jié)構(gòu)第振型F
αγXGj j ij
(4.3.10-1=i=1j
XGij X2G
(i=1,2,.,n;j=1,2,.,m)
(4.3.10-2 ——質(zhì)點(diǎn)i的重力荷載代表值,應(yīng)按本規(guī)程第4.3.7
——第j振型水平地震作用的標(biāo)準(zhǔn)值;
——相應(yīng)于j振型自振周期的地震影響系數(shù),應(yīng)按本規(guī)程第4.3.8~4.3.9定;
——第j振型的水平相對位移;
——第j的參與系數(shù);n ——m——結(jié)構(gòu)計算振型數(shù),按本規(guī)程第5.1.20、5.1.21條規(guī)定采用。∑Y∑YG
=∑
(4.3.10-3式中:S——水平地震作用標(biāo)準(zhǔn)值的效應(yīng);Sj——j水平地震作用標(biāo)準(zhǔn)值的效應(yīng)(彎矩、剪力、軸向力和位移等)。算方法確定地震作用。j振型i質(zhì)點(diǎn)的水平地震作用標(biāo)準(zhǔn)值,應(yīng)按下列公式確定:F=αγYGyij j tjij
F
αγYGj tjij
=αγXGij j tj ij
(i=1,2,.,n;j=1,2,.,m)
(4.3.11-1F=αγr2ΦG jtji ——分別為j振型i質(zhì)點(diǎn)的x方向、yXij、Yij ——分別為j振型i質(zhì)點(diǎn)質(zhì)心在x、y
——j振型相對扭轉(zhuǎn)角;r ——i層轉(zhuǎn)動半徑,可取iαj ——相應(yīng)于第j振型自振周期的地震影響系數(shù),應(yīng)按本規(guī)程第4.3.84.3.9γtj ——考慮扭轉(zhuǎn)的j振型參與系數(shù),可按本規(guī)程公式(4.3.11-2~(4.3.11-4n ——m ——結(jié)構(gòu)計算振型數(shù),按本規(guī)程第5.1.21當(dāng)僅考慮向地震作用時:γ
ni=1
XGij
n/∑(i
X2+Y2+Φ2γ2)G iji
(4.3.11-2當(dāng)僅考慮向地震作用時:γ
n
n
X2+Y2+Φ2γ2)G iji
(4.3.11-3當(dāng)考慮與x方向夾角為的地震作用時:≥λ∑G≥λ∑Gγ=γcosθ+γsinθ
(4.3.11-4單向水平地震作用下,考慮扭轉(zhuǎn)耦聯(lián)振動影響的地震作用效應(yīng),應(yīng)按下列公式確定S
=∑∑j=1k=1
ρ
SS
(4.3.11-5ρ 8ζζ(ζ+λζ)λ1.5 ik j T k jk (1-λ2)2+4ζζ(1+λλ+4(ζ2+ζ2)λ2T jk T T j k 式中:S ——Sj、Sk ——分別為j、k——j振型與的耦聯(lián)系數(shù);k周期比;ζj、ζ ——分別為j、k
(4.3.11-6S=S
(4.3.11-7
S=S
(4.3.11-8式中:x——僅考慮向水平地震作用時的地震作用效應(yīng),按式(算;Sy僅考慮向水平地震作用時的地震作用效應(yīng),按式(算。V
j=i
4.3.12式中:VEk ——第iλ ——水平地震剪力系數(shù),不應(yīng)小于表應(yīng)乘以1.15系數(shù);G ——第jn —— 3.5s0.0160.0240.0120.018注:1 基本周期介于3.5s5.0s2 7度時括號內(nèi)數(shù)值用于設(shè)計基本地震加速度為0.15g力要求,放大后的基底總剪力尚不宜小于按底部剪力法算得的總剪力的85%采用F=αG 1eq
(4.3.14-1
(4.3.14-2 ——
T14.3.9本規(guī)程4.3.18折減系數(shù);
——構(gòu)地震作用的結(jié)構(gòu)等效總重力荷載代表值;
——構(gòu)地震作用的結(jié)構(gòu)總重力荷載代表值。的地震加速度最大值可按規(guī)定的水平輸入最大值的反應(yīng)譜法或時域顯式隨機(jī)模擬法分析時結(jié)構(gòu)豎向地震影響系數(shù)最大值可按水平地震影響系數(shù)最大值的特征周期可按設(shè)計組采用。結(jié)構(gòu)豎向地震作用標(biāo)準(zhǔn)值也可按下列規(guī)定計算(圖FEvk=αvmaxGeq (4.3.16-1Geq=0.75GE (4.3.16-2αvmax=0.65αmax式中:FEvk ——ax——豎向地震影響系數(shù)最大值;——等效總重力荷載代表值;
(4.3.16-3
——豎向地震作用時,結(jié)構(gòu)總重力荷載代表值,應(yīng)取各質(zhì)點(diǎn)重力荷載代表值之和。結(jié)構(gòu)質(zhì)點(diǎn)GHF= ∑GjHj
F
(4.3.16-4式中:Fvi ——質(zhì)點(diǎn)iGi、G ——分別為集中于質(zhì)點(diǎn)i、j的重力荷載代表值,應(yīng)按本規(guī)程第4.3.7Hi、H ——分別為質(zhì)點(diǎn)、j數(shù)1.5 不宜小于結(jié)構(gòu)或構(gòu)件承受的重力荷載代表值與表4.3.17的豎向地震作用系數(shù)的乘積。 注:重力加速度??蚣芙Y(jié)構(gòu)可取框架剪力墻結(jié)構(gòu)可取0.7~0.8框架核心筒結(jié)構(gòu)可取0.9剪力墻結(jié)構(gòu)可取其他結(jié)構(gòu)體系或采用其他非承重墻體時,可根據(jù)工程實(shí)際情況確定周期折減系數(shù)。復(fù)雜結(jié)構(gòu)和混合結(jié)構(gòu)高層建筑的計算分析,除應(yīng)符合本章規(guī)定外,尚應(yīng)符合本規(guī)程第11章和第12章的有關(guān)規(guī)定。內(nèi)力重分布。梁可用桿單元或殼單元模擬。當(dāng)連梁的跨高比小于2時,宜用殼單元模擬。也可以采用其他能反映構(gòu)件受力情況的力學(xué)模型。保證樓板平面的整體剛度。定計算方法的計算結(jié)果進(jìn)行適當(dāng)調(diào)整,必要時采用彈性樓板或局部彈性樓板模型進(jìn)行補(bǔ)充計算?;驓卧M樓板。限元分析,作為截面承載力設(shè)計的依據(jù)。力的增大;當(dāng)整體計算中未考慮樓面活荷載不利布置時,應(yīng)適當(dāng)增大樓面梁的計算彎矩。計算模型考慮施工過程的影響;房屋高度在150m復(fù)雜高層建筑,宜考慮施工過程的影響。應(yīng);體型復(fù)雜的高層建筑,應(yīng)考慮風(fēng)向角的不利影響。本規(guī)程第12有關(guān)規(guī)定進(jìn)行截面設(shè)計。進(jìn)行整體計算,不同結(jié)構(gòu)分析軟件之間彈性計算結(jié)果的差異不應(yīng)過大。合下列要求:下列豎向不規(guī)則高層建筑結(jié)構(gòu)的計算分析應(yīng)符合本規(guī)程第結(jié)構(gòu)樓層側(cè)向剛度不符合本規(guī)程第結(jié)構(gòu)樓層抗側(cè)力結(jié)構(gòu)的層間受剪承載力小于其上一層的至少附帶兩跨的裙樓結(jié)構(gòu)。裙樓屋面宜考慮與塔樓相互作用的影響并采取適當(dāng)?shù)募訌?qiáng)措施。對受力復(fù)雜的節(jié)點(diǎn)或結(jié)構(gòu)構(gòu)件宜按精細(xì)有限元分析的結(jié)果校核配筋設(shè)計,必要時進(jìn)行結(jié)構(gòu)模型驗(yàn)證。件。地震作用分析時,不考慮平扭耦聯(lián)振動影響的結(jié)構(gòu),其計算振型數(shù)為3~5,對多塔樓結(jié)構(gòu)不應(yīng)少于塔樓數(shù)的3倍;考慮平扭耦聯(lián)振動的影響的結(jié)構(gòu),其計算振型數(shù)為9~15,對B級高度的高層建筑結(jié)9結(jié)構(gòu)較高或沿豎向的剛度、質(zhì)量不均勻時應(yīng)適當(dāng)增加。地震作用分析的計算振型數(shù)應(yīng)使水平主軸方向的質(zhì)量參與系數(shù)不小于90%。為充分考慮高振型該部分水平主軸方向的質(zhì)量參與系數(shù)不小于。高層建筑結(jié)構(gòu)計算時,框架折減系數(shù)不宜小于;抗震設(shè)計控制時,折減系數(shù)不宜小于烈度(中震)構(gòu)件承載力校核時不宜小于0.3定。規(guī)定:梁端負(fù)彎矩調(diào)幅系數(shù)可取為0.9設(shè)計值的。小的幅度不宜超過30%應(yīng)地按靜力平衡條件調(diào)整梁跨中彎矩、梁端剪力及豎向構(gòu)件的軸力。于0.3計算長期荷載作用下鋼(鋼管混凝土)框架變、收縮的影響,混凝土核心筒的軸向剛度可乘以系數(shù)。注:本條與5.2.4同時考慮。所選用的計算分析軟件的力學(xué)模型。方法予以近似考慮。度原則對密肋梁進(jìn)行適當(dāng)簡化后再行計算。帶等效為框架梁計算。算彎矩可取剛域端截面。剛域的長度可按下列公式計算:lb1=a1-0.25hb (5.3.4-1lb2=a2-0.25hb (5.3.4-2lc1=c1-0.25bc (5.3.4-3lc2=c2-0.25算的剛域長度為負(fù)值時,應(yīng)取為零。圖5.3.4
(5.3.4-4線附加扭矩的方法近似,同時計及轉(zhuǎn)換層樓板對梁的約束作用。處理,并應(yīng)在整體計算的基礎(chǔ)上對結(jié)構(gòu)局部進(jìn)行更細(xì)致的補(bǔ)充計算分析。距墻端墻厚以上、高度小削弱的影響,并采取必要的加強(qiáng)措施。以地下室頂板作為上部結(jié)構(gòu)的計算嵌固部位時,地下一層的側(cè)向剛度不應(yīng)小于首層側(cè)向剛度的2倍。當(dāng)剪力墻結(jié)構(gòu)、框架EJd
≥2.7
H2 Gii=1
(i=1,2,.,n)
5.4.1-1D
≥20∑
/hj
(i=1,2,.,n)
(5.4.1-2式中:EJd ——結(jié)構(gòu)一個主軸方向的彈性等效側(cè)向剛度,可按倒三角形分布荷載作用下結(jié)構(gòu)頂點(diǎn)位等的原則,將結(jié)構(gòu)的側(cè)向剛度折算為豎向懸臂受彎構(gòu)件的等效側(cè)向剛度;Gi、G ——分別為第i、j樓層重力荷載設(shè)計值,取1.2倍的永久荷載標(biāo)準(zhǔn)值與1.4倍的樓面可變荷準(zhǔn)值的組合值;
——i層層高;
——第i的彈性等效側(cè)向剛度,可取該層剪力與層間位移的比值;n ——下結(jié)構(gòu)內(nèi)力和位移的不利影響。算結(jié)果乘以增大系數(shù)的方法近似考慮。近似考慮時,結(jié)構(gòu)位移增大系數(shù)F、F1i以及結(jié)構(gòu)構(gòu)件彎矩和剪架結(jié)構(gòu),可按下列公式計算:
n-∑j
/(Dh)j ii
(i=1,2,.,n)
5.4.3-1
n1-2∑=
/(Dh)j ii
(i=1,2,.,n)
5.4.3-2對剪力墻結(jié)構(gòu)、框架墻結(jié)構(gòu)、筒體結(jié)構(gòu),可按下列公式計算:
n G/(EJ)
(5.4.3-32
n G/(EJ)
5.4.3-4剪力墻結(jié)構(gòu)、框架EJd
≥1.4
H2 Gii=1
5.4.4-1D
j=i
G/hj
(i=1,2,.,n)
(5.4.4-2高層建筑結(jié)構(gòu)的整體穩(wěn)定性也可用有限元特征值法進(jìn)行計算。由特征值法算得的屈曲因子小于10。當(dāng)屈曲因子λ小于20結(jié)構(gòu)的內(nèi)力和位移計算應(yīng)考慮重力二階效應(yīng)的影響。符合下列規(guī)定:當(dāng)采用結(jié)構(gòu)抗震性能設(shè)計時,應(yīng)根據(jù)本規(guī)程GB以及計算結(jié)果的選用應(yīng)符合本規(guī)程第4.3.5規(guī)定;不超過12層且層側(cè)向剛度無突變的框架結(jié)構(gòu)可采用本規(guī)程第除第1程曲線;地震波持續(xù)時間不宜少于結(jié)構(gòu)自振周期的倍和15s,數(shù)值化時間間距可取為0.01s0.02s輸入地震波的最大加速度,可按表1)服強(qiáng)度系數(shù)沿高度分布均勻的結(jié)構(gòu),可取底層;2可取該系數(shù)最小的樓層(部位)和相對較小的樓層,一般不超過3Δu=ηΔup p
(5.5.4-1
ηΔu=μΔu=pΔup y ξ
(5.5.4-2
Δu——彈塑性層間位移;Δu——層間屈服位移;μ ——ue表4.3.7-1η——彈塑性位移增大系數(shù),當(dāng)薄弱層(部位)的屈服強(qiáng)度系數(shù)不小于相鄰層(部位)該系數(shù)平均值的0.85.5.4采用;當(dāng)不大于該平均值的時,可按表內(nèi)相應(yīng)數(shù)值的;其他情況可采用內(nèi)插法取值;ξ——樓層屈服強(qiáng)度系數(shù)。 按下式確定:S=γS +γψγS +ψγSd GGk L QQQk ww 式中:Sd —— ——Gγ —— ——w
5.6.1 L為1001.1SGk ——SQk ——Swk ——ψ、ψw 分別取0.70.0;當(dāng)可變荷載效應(yīng)起控制作用時應(yīng)分別取和0.6或0.7和1.0注:對書庫、檔案庫、儲藏室、通風(fēng)機(jī)房和電梯機(jī)房,本條樓面活荷載組合值系數(shù)取的場合應(yīng)取為0.9由永久荷載效應(yīng)控制的組合應(yīng)??;當(dāng)其效應(yīng)對結(jié)構(gòu)有利時,應(yīng)取;確定:S=γS +γS +γS +ψγSd G GE Eh Ehk Ev Evk w w wk式中:Sd ——SGE ——SEhk ——SEvk ——γG ——γ ——γEh ——γEv —— ——風(fēng)荷載的組合值系數(shù),應(yīng)取w
5.6.3的承載力有利時,表中γG不應(yīng)大于1.0 重力荷載、水平地震及豎向重力荷載、水平地震作用及 重力荷載、水平地震作用、注:表中“—”不考慮該項(xiàng)荷載或作用效應(yīng)。條和5.6.3值,尚應(yīng)按本規(guī)程的有關(guān)規(guī)定進(jìn)行調(diào)整。第3.11節(jié)的要求進(jìn)行抗震性能設(shè)計,結(jié)構(gòu)抗震性能目標(biāo)不應(yīng)低于下列要求:應(yīng)全長加密。砌體的砂漿強(qiáng)度等級不應(yīng)低于M5,當(dāng)采用磚及混凝土砌塊時,砌塊的強(qiáng)度等級不應(yīng)低于MU5;采用輕質(zhì)砌塊時,砌塊的強(qiáng)度等級不應(yīng)低于MU2.5頂應(yīng)與框架梁或樓板緊密結(jié)合。小于200mm,伸入墻內(nèi)的長度,、7度時宜全長貫通,時應(yīng)全長貫通。墻長大于5m時,墻頂與梁(板)宜有鋼筋拉結(jié);墻長大于層高的倍時,宜設(shè)置間距不大于凝土水平系梁。樓梯間采用砌體填充墻時,應(yīng)設(shè)置間距不大于層高且不大于砂漿面層加強(qiáng)。部出屋頂?shù)碾娞輽C(jī)房、等,應(yīng)采用框架承重,不應(yīng)采用砌體墻承重。構(gòu)造的不利影響,以及梁荷載對柱的偏心影響??拐鹪O(shè)計時,除頂層、柱軸壓比小于合的柱端彎矩設(shè)計值應(yīng)符合下列要求:c
Mbua
(6.2.1-1∑M=η∑c c
Mb
6.2.1-2,可按彈性分析的彎矩比例進(jìn)行分配; ∑b——節(jié)點(diǎn)左、右梁端截面逆時針或順時針方向組合彎矩設(shè)計值之和。當(dāng)抗震等級為一級且節(jié)點(diǎn)左、端均為負(fù)彎矩時,絕對值較小的彎矩應(yīng)取零;∑Mbua——節(jié)點(diǎn)左、右梁端逆時針或順時針方向?qū)嵟涞恼孛婵拐鹗軓澇休d力所對應(yīng)的彎矩值之和,可根據(jù)實(shí)際配筋面積(計入受壓鋼筋和梁有效翼緣寬度范圍內(nèi)的樓板鋼筋)準(zhǔn)值并考慮承載力抗震調(diào)整系數(shù)計算;二、三、四級分別取1.41.2、1.1和1.1M、 M、 M、 、合的彎矩值與增大系數(shù)1.71.5、1.3積。底層框架柱縱向鋼筋應(yīng)按上、下端的不利情況配置。
H
(6.2.3-1V
=η(Mt+Mb)/H c
(6.2.3-2
——6.2.1條、6.2.2規(guī)定;
承載力所對應(yīng)的彎值并考慮承載力抗震調(diào)整系數(shù)計算;H ——ηvc ——柱端剪力增大系數(shù)。對框架結(jié)構(gòu),二、三級分別取1.3、1.2;對其他結(jié)構(gòu)類型的框架,一、二級分別取1.41.2,三、四級均取1.1柱按本規(guī)程第6.2.1~6.2.3條調(diào)整后的彎矩、剪力設(shè)計值應(yīng)再乘以不小于增大系數(shù)。考慮地震作用組合的剪力計算值。
r )/l+V n
(6.2.5-1V
=η(Ml+Mr)/l+V
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