钢支撑稳定计算.xls

钢支撑稳定计算.xls

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基基坑坑横横向向钢钢支支撑撑截截面面设设计计计计算算书书（*（*里里程程处处）一、计算原则：

1.支撑结构竖向荷载设计值包括构件自重及施工荷载、安装误差产生的偏心荷载2.支撑结构按压弯构件进行计算3.依据规范：

钢结构设计规范GB50017-2003、建筑基坑支护技术规程JGJ120-99、建筑基坑工程技术规程DB29-202-2010、建筑结构荷载规范GB50009-2001（2006年版）二、设计计算：

输入参数：

支撑轴力Nc（kN/m）30003000支撑间距s（m）钢管直径D（m）0.6090.609支撑长度L（m）钢管壁厚d（m）0.0160.016截面类型钢材牌号Q235Q235钢钢施工荷载M施（kN/m）基坑安全等级一一级级基坑重要性系数o永久荷载的分项系数G1.251.25施工荷载分项系数Q等效弯矩系数x11截面塑性发展系数x长度系数11弹性模量E（kN/m2）钢材屈服强度fy（N/mm2）235235钢材强度设计值f（N/mm2）计算结果：

计算长度（m）lc=L10.310.3钢管面积（m2）A=（D2-（D-2d）2）/4要求的偏心距e01（m）0.0400.040计算的偏心距（m）e02=lc2/1000惯性矩（m4）Ix=（D4-（D-2d）4）/640.00130.0013支撑轴力（kN）N=1.25oNcs截面系数（m3）Wx=Ix2/D0.00430.0043钢支撑自重（kN/m）M自重=g钢AG回转半径（m）ix=SQRT（Ix/A）0.20970.2097施工荷载设计值（kN/m）M施=M施Q构件长细比x=lc/ix49.110049.1100初始偏心距e0=MAX（e01,e02）截面稳定性系数0.8600.860x（fy/235）（1/2）自重及施工弯矩（kNm）M1=1/8（M自重+M施）lc238.78738.787附加弯矩（kNm）M2=Ne0三、强度和稳定性验算：

一一、强强度度计计算算1=N/An138.388138.3882=Mx/（*Wx）41.15341.153=1+2179.542179.542满满足足二二、稳稳定定性性计计算算Nex=2EA/1.1x222843.3522843.351=N/（*A）160.832160.8322=mx*Mx/（*Wx*（1-0.8N/Nex））48.10248.102=1+2208.935208.935满满足足表表格格黄黄底底红红字字部部分分为为设设计计者者需需要要填填写写部部分分绿绿色色部部分分为为截截面面验验算算结结果果1110.310.3bb类类001.11.11.41.41.151.152060000002060000002152150.02980.02980.0210.0214125.004125.002.9252.925000.0400.04049.11049.110165.000165.0003.依据规范：

钢结构设计规范GB50017-2003、建筑基坑支护技术规程JGJ120-99、建筑基坑工程技术规程DB29-202-2010、建筑结构荷载规范GB50009-2001（2006年版）（N/mm2）（N/mm2）（N/mm2）（N/mm2）（N/mm2）（N/mm2）x（fy/235）（1/2）x（fy/235）（1/2）01.00049.109950850.91911.00021.00031.00040.99950.99960.99870.99880.99790.996100.995110.994120.993130.992140.991150.989160.988170.986180.985190.983200.981210.979220.977230.976240.974250.972260.970270.968280.966290.964300.963310.961320.959330.957340.955350.952360.950370.948380.946390.944400.941410.939420.937430.934440.932450.929460.927470.924480.921490.919500.916510.913520.910530.907540.904550.900560.897570.894580.890590.886600.883610.879620.875630.871640.867650.863660.858670.854680.849690.844700.839710.834720.829730.824740.818750.813760.807770.801780.795790.789800.783810.776820.770830.763840.757850.750860.743870.736880.728890.721900.714910.706920.699930.691940.684950.676960.668970.661980.653990.6451000.6381010.6301020.6221030.6151040.6071050.6001060.5921070.5851080.5771090.5701100.5631110.5551120.5481130.5411140.5341150.5271160.5201170.5141180.5071190.5001200.4941210.4881220.4811230.4751240.4691250.4631260.4571270.4511280.4451290.4401300.4341310.4291320.4231330.4181340.4121350.4071360.4021370.3971380.3921390.3871400.3831410.3781420.3731430.3691440.3641450.3601460.3561470.3511480.3471490.3431500.3391510.3351520.3311530.3271540.3231550.3201560.3161570.3121580.3091590.3051600.3021610.2981620.2951630.2921640.2891650.2851660.2821670.2791680.2761690.2731700.2701710.2671720.2641730.2621740.2591750.2561760.2531770.2511780.2481790.2461800.2431810.2411820.2381830.2361840.2331850.2311860.2291870.2261880.2241890.2221900.2201910.2181920.2151930.2131940.2111950.2091960.2071970.2051980.2031990.2012000.1992010.1982020.1962030.1942040.1922050.1902060.1892070.1872080.1852090.1832100.1822110.1802120.1792130.1772140.1752150.1742160.1722170.1712180.1692190.1682200.1662210.1652220.1642230.1622240.1612250.1592260.1582270.1572280.1552290.1542300.1532310.1522320.1502330.1492340.1482350.1472360.1462370.1442380.1432390.1422400.1412410.1402420.1392430.1382440.1362450.1352460.1342470.1332480.1322490.1312500.130x（fy/235）（1/2）x（fy/235）（1/2）01.00049.109950850.86011.00021.00030.99940.99950.99860.99770.99680.99590.994100.992110.991120.989130.987140.985150.983160.981170.978180.976190.973200.970210.967220.963230.960240.957250.953260.950270.946280.943290.939300.936310.932320.929330.925340.922350.918360.914370.910380.906390.903400.899410.895420.891430.887440.882450.878460.874470.870480.865490.861500.856510.852520.847530.842540.838550.833560.828570.823580.818590.813600.807610.802620.797630.791640.786650.780660.774670.769680.763690.757700.751710.745720.739730.732740.726750.720760.714770.707780.701790.694800.688810.681820.675830.668840.661850.655860.648870.641880.635890.628900.621910.614920.608930.601940.594950.588960.581970.575980.568990.5611000.5551010.5491020.5421030.5361040.5291050.5231060.5171070.5111080.5051090.4991100.4931110.4871120.4811130.4751140.4701150.4641160.4581170.4531180.4471190.4421200.4371210.4321220.4261230.4211240.4161250.4111260.4061270.4021280.3971290.3921300.3871310.3831320.3781330.3741340.3701350.3651360.3611370.3571380.3531390.3491400.3451410.3411420.3371430.3331440.3291450.3261460.3221470.3181480.3151490.3111500.3081510.3041520.3011530.2981540.2951550.2911560.2881570.2851580.2821590.2791600.2761610.2731620.2701630.2671640.2651650.2621660.2591670.2561680.2541690.2511700.2491710.2461720.2441730.2411740.2391750.2361760.2341770.2321780.2291790.2271800.2251810.2231820.2201830.2181840.2161850.2141860.2121870.2101880.2081890.2061900.2041910.2021920.2001930.1981940.1971950.1951960.1931970.1911980.1901990.1882000.1862010.1842020.1832030.1812040.1802050.1782060.1762070.1752080.1732090.1722100.1702110.1692120.1672130.1662140.1652150.1632160.1622170.1602180.15