英文隔震結(jié)構(gòu)的

第四章隔震結(jié)構(gòu)的分析令第一節(jié)正交阻尼結(jié)構(gòu)11.1EquationsofMotionss2MassRatiosNominalFrequenciesAssume1.2DefinitionsofSeveralFactorsNominalDampingRatiosbands

31.3ModalAnalysisCharacteristicEquationfortheFrequenciesFreeVibrationEquationsofUndampedSystem4SolutionsofCharacteristicEquationModeShapesApproximationtofirstorderin5ModeCoordinatesqpremultiplyingbyTModalEquationswhereModalLoadFactor(振型參與因子)Li

isgivenby6UncoupledModalEquationsandmodaldampingratioi

iscomputedfrom7MaximumDisplacementsApproximationtofirstorderin81.4BaseShearCoefficientofSuperstructure9第二節(jié)非正交阻尼結(jié)構(gòu)2.1Significanceofoff-diagonaldampingterms10112.2Ignoringoneofoff-diagonaldampingtermsModalLoadFactorResultingEquation12132.3InterstoryDrift14(i)thatcontributedbytheuncoupledfirstmode(ii)thatfromtheuncoupledsecondmodeThreeItems15(iii)thatfromthecoupledtermRelationwithResponseSpectrum1617I3SVI4SV18ConstantVelocitySpectra注意：H()修正與我國規(guī)范的差異例如，H()可取19Ig吊no齡re2an督d育i畏n京th誦e帥3rdte透rm20Ka眨wa染sh爹im粘a-漠Ai西za壇wa玩F板un雅ct驗io虹nR=蓋0.循33甲w離he堡nb=0.疲1R=悅1.礙80鋼w生he兇nb=0.韻5Ex者am巴pl刪e212.陜3暈Fl驚oo皆r迎Ac自ce千le班ra淚ti鬧on22算例已知煉：隔聾震結(jié)浩構(gòu)重于量為聾W，現(xiàn)周期述為2賤.5緞s，晌阻尼粘比5液％，=魄1/班25僚，飯=1堂/2。按路規(guī)范漂算得紀的隔鳳震層碌位移晚為7把6c屈m，燈為減浸小位采移在大隔震嚇層設(shè)嬸置粘發(fā)滯阻個尼器絹，其汁阻尼于比為磁50內(nèi)％。稀求增設(shè)球粘滯洞阻尼隙器后夜的隔震主層位竿移、基底仔剪力和屋描面加司速度餃。解：(1萌)隔晨震層休位移赴為23最大培位移連時的鉗底部躲剪力貍為阻尼燒力最大始剪力偽速齊度譜怠值按p窗22堡頁公界式計對算樓勿面加曲速度晌，結(jié)返果如嫁下：基底槍剪力屋面名加速劑度2425參考跳文獻1.敘N渡ae財im值F葉a絡(luò)nd街K走el說ly脖J嗚M,盡“查De戴si萄gn攤o后f燈se太is門mi你c燒is憐ol斑at嶄ed爸s提t(yī)r齡uc卵tu恐re稀s”哀J甘oh湯n統(tǒng)Wi剝