屋架桁架計算書

屋架桁架計算書計算軟件：MTS鋼結(jié)構(gòu)設(shè)計系列軟件MTSToolv2.0.1.20計算時間：2009年03月11日19:03:51一.設(shè)計資料桁架跨度為10000mm,高度為0mm構(gòu)件總重：168.003公斤,構(gòu)件每米單重：16.8003公斤/米結(jié)構(gòu)簡圖如下所示：二.截面布置桿件編號圖如下所示：表1桿件截面信息桿件號截面材料1L-63*5Q2352L-90*6Q2353L-50*5Q2354L-63*5Q235

5L-90*6Q2356L-50*5Q2357L-50*3Q2358L-63*5Q2359L-90*6Q23510L-50*5Q23511L-50*3Q23512L-63*5Q23513L-90*6Q23514L-50*5Q23515L-50*3Q23516L-63*5Q23517L-90*6Q23518L-50*5Q23519L-50*3Q23520L-63*5Q23521L-90*6Q23522L-50*5Q23523L-50*3Q23524L-63*5Q23525L-90*6Q23526L-50*5Q23527L-50*3Q23528L-63*5Q23529L-90*6Q235三.荷載布置恒載荷載下面簡稱:D）布置圖如下所示:另疊加桁架自重?；钶d荷載1（下面簡稱:L1）布置圖如下所示:風(fēng)荷載1（下面簡稱:W1）布置圖如下所示:四.位移結(jié)果1.0D+1.0L撓度圖如下所示:1.0D撓度圖如下所示:內(nèi)力結(jié)果考慮的荷載組合：1.35D+0.7xl.4L+0.6x1.4Wi1.2D+1.4L+0.6X.4Wi1.2D+1.4Wi+0.7x1.4Li內(nèi)力包絡(luò)圖如下所示：525f752引52575257710525f752引52575257710表1桿件內(nèi)力結(jié)果桿件號DL1W1最大拉力最大壓力135.0718.09-1.1467.402-35.88-18.5-0.1590-69.13-0.287-0.1820.00940-0.598435.0718.09-1.1467.405-33.96-17.480.130-65.236-2.85-1.520.09760-5.567-1.69-0.8990.08250-3.28827.5914.19-0.85752.9709-34.11-17.560.5130-65.5110-0.0204-0.04850.00340-0.0924116.83.52-0.23413.0801227.5914.19-0.85752.97013-22.86-11.750.5070-43.88146.383.23-0.10112.18015-5.98-3.080.2020-11.491627.5914.19-0.67452.97017-22.86-11.750.8540-43.8818-0.0204-0.04850.00190-0.092419-5.98-3.08-0.01090-11.52027.5914.19-0.67452.97021-34.11-17.560.8510-65.5122-2.85-1.520.01180-5.56236.83.52-0.005613.0802435.0718.09-0.61867.4025-33.96-17.480.8490-65.2326-0.287-0.1820.00560-0.59827-1.69-0.899-0.06240-3.332835.0718.09-0.61867.4029-35.88-18.50.790-68.96表2支座反力結(jié)果支座DL1W1最大壓力最大拉力左支座7.043.630.031218.320右支座7.043.63-0.15518.30應(yīng)力結(jié)果最大應(yīng)力簡圖如下所示：表1桿件驗算結(jié)果桿件號強度應(yīng)力穩(wěn)定應(yīng)力應(yīng)力限值長細(xì)比長細(xì)比限制通過否1109.73-215154.64350是2-106.84-169.84215107.53200是3-1.25-1.3021522.96200是4109.73-215154.64350是5-103.21-162.68215107.53200是6-11.57-13.2321545.92200是7-11.05-23.73215114.73200是886.23-215154.64350是9-103.47-163.19215107.53200是10-0.192-0.2521568.88200是

1144.031144.03-215131.23501286.23-215154.6435013-83.13-123.14215107.532001425.36-21591.8435015-38.69-101.27215131.22001686.23-215154.6435017-83.13-123.14215107.5320018-0.192-0.2521568.8820019-38.72-101.35215131.22002086.23-215154.6435021-103.47-163.19215107.5320022-11.57-13.2321545.922002344.03-215131.235024109.73-215154.6435025-103.21-162.68215107.5320026-1.25-1.3021522.9620027-11.22-24.11215114.7320028109.73-215154.6435029-106.72-169.59215107.53200是是是是是是是是是是是是是是是是是是是最不利構(gòu)件應(yīng)力詳細(xì)校核最不利下弦1號桿件，采用截面L-63*5-Q235截面面積：A=6.143cm2強度驗算：單角鋼強度折減系數(shù)：1單角鋼修正強度取值：215xl=215N/mm2°=67.405/6.143xl0=109.726N/mm2〈215MPa，合格最不利上弦2號桿件，采用截面L-90*6-Q235截面面積：A=10.637cm2強度驗算：單角鋼強度折減系數(shù)：1單角鋼修正強度取值：215xl=215N/mm2o=69.097/10.637X0=-64.959N/mm2〈215MPa,合格上弦桿件考慮節(jié)間彎距補充計算上弦桿件彎距設(shè)計值計算考慮構(gòu)件自重：0.0835kN/m考慮恒載：1.575kN/m考慮活載：0.9kN/m活載控制荷載設(shè)計值：1.2X0.0835+1.575)+1.4X.9=3.25kN/m恒載控制荷載設(shè)計值：1.35x(0.0835+1.575)+0.98X.9=3.121kN/m上弦荷載設(shè)計值：max(3.25,3.121)=3.25kN/m上弦繞x軸彎矩設(shè)計值：3.25x1x1.275x1.275/10=0.5282kNxn上弦繞y軸彎矩設(shè)計值：3.25x4.647e-014x1.275x1.275/10=2.454e-014kNxn上弦桿件考慮節(jié)間彎距強度:o=69096.712/1063.7-528157.586/12610-2.454e-008/12610=T06.843N/mm2〈215MPa，合格穩(wěn)定驗算：對主軸x計算長度：Lx=1.275m對主軸y計算長度：Ly=3m對主軸x長細(xì)比：久x=1.275/2.79xl00=45.69對主軸y長細(xì)比：Ay=3/2.79x100=107.527最大長細(xì)比：Amax=107.527等邊單角鋼強度折減系數(shù)：1單角鋼修正強度取值：215xl=215N/mm2穩(wěn)定系數(shù)：0=0.5077穩(wěn)定驗算：^=-69.097/10.637/0.5077X0=-127.952N/mm2〈215MPa,合格疊加桿件荷載后上弦對主軸x壓彎穩(wěn)定驗算：0x=0.8753幾x=l?0幾y=1.0Nex=3.141x3.141x206000x10.637/45.69/45.69/l.l/10=941.778kN0by=1^=-69.097/10.637/0.875310-1.0>0.5282/12.61/(1-0.89.097/941.778)-11.0>2.454e-014/12.61/l%000=-118.708N/mm2118.708〈=215，合格！疊加桿件荷載后上弦桿件對主軸y壓彎穩(wěn)定驗算：0y=0.5077幾x=i.0幾y=1.0Ney=3.141x3.141x206000x10.637/107.527/107.527/l.l/10=941.778kNn=i.00bx=1°=69.097/10.637/0.507710-lx1.0>0.5282/12.61/l-1.02x454e-014/12.61/(l-0.86x9.097/170.043)=-169.836N/mm2169.836〈=215，合格！最不利豎桿14號桿件，采用截面L-50*5-Q235截面面積：A=4.803cm2強度驗算：單角鋼強度折減系數(shù)：1單角鋼修正強度取值：2151=215N/mm20=12.18/4.803x10=25.36N/iw〈215MPa,合格最不利斜桿19號桿件，采用截面L-50*3-Q235截面面積：A=2.971cm2強度驗算：單角鋼強度折減系數(shù)：1單角鋼修正強度取值：2151=215N/mm20=-11.503/2.97110=-38.719N/mm2〈215MPa，合格穩(wěn)定驗算：對主軸x計算長度：Lx=1.166m對主軸y計算長度：Ly=1.458m對斜平面主軸u計算長度：Lu=1.312m對主軸x長細(xì)比：Ax=1.166/1