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横向分布系数的计算跨中横向力分布系数:%HY$i+Z7z*A9^'~对于板梁和小箱梁由于横向联系比较薄弱,所以采用铰接板梁法对于T梁有横隔板比较多,认为是刚接,所以采用刚接板梁法对于整体箱梁,其刚度很大,采用修正偏压法,在实际工程中,采用偏载系数法,如:梁端横向力分布系数::对于板梁、T梁和小箱梁通常采用杠杆法对于整体箱梁,其刚度很大,采用偏压法,即刚性横梁法。下面就讲一下30米简支转连续T梁横向力分布系数计算主梁横断面其分布调整系数就是其所承受的汽车总列数,考虑纵横向折减、偏载后的修正值。例如,对于一个跨度为230米的桥面4车道的整体箱梁验算时,其横向分布系数应为4x0.67(四车道的横向折减系数)x1.15(经计算而得的偏载系数)x0.97(大跨径的纵向折减系数)=2.990。汽车的横向分布系数已经包含了汽车车道数的影响。一、计算抗弯惯距、抗扭惯距1、中梁跨中抗弯惯距、抗扭惯距用迈达斯软件计算MIDASSPCTEXTOUTPUTFILE*A:8559.999999999918*Asx:4007.443150449152*Asy:3544.016051445182*Ixx:42269666.651099205000抗弯惯距*Iyy:14234083.333334446000*Ixy:0.000001907349*J:1494026.255774231600抗扭惯距*(+)Cx:107.500000000000*(-)Cx:107.500000000000*(+)Cy:70.235981308412*(-)Cy:129.764018691588----------------------------------------------------*(+)1/Sx:0.000002543195*(-)1/Sx:0.000002543195*(+)1/Sy:0.000004934352*(-)1/Sy:0.000009116430====================================================Ixx=0.423m**4J=0.0149m**42、边梁跨中抗弯惯距、抗扭惯距MIDASSPCTEXTOUTPUTFILE*A:8439.999999999964*Asx:3914.883748423421*Asy:3557.794766375056*Ixx:41795700.063194275000抗弯惯距*Iyy:12923468.108212471000*Ixy:785854.620852470400*J:1476463.213086383400抗扭惯距*(+)Cx:106.024881516587*(-)Cx:101.475118483413*(+)Cy:71.120853080569*(-)Cy:128.879146919431*(+)1/Sx:0.000002536741*(-)1/Sx:0.000002427884*(+)1/Sy:0.000005503233*(-)1/Sy:0.000009972489Ixx=0.418m**4J=0.0147m**4二、抗弯刚度修正系数的计算K=δ0/δ1、 抗弯刚度换算系数K的计算:由于结构是多跨连续梁(本文假定是3x30简支转连续T梁),所以应该考虑抗弯刚度修正系数.,简支梁不考虑抗弯修正系数跨度比L2:L1边跨L1中跨L2边跨L1中跨L2边跨L1中跨L20.81.4971.78911.3921.3921.4291.8181.4321.861.11.3661.4171.4041.8761.4041.891.21.3431.4421.3821.8311.3811.9191.41.3061.4481.3442.0341.3411.9741.51.291.511.3282.0791.32421.61.2761.5291.3142.1251.3092.0221.81.2521.5671.2892.2091.2822.07921.2311.61.2672.2861.2622.105内插得项目边跨中跨K1.4291.818则在计算边跨横向力分布系数,边跨的中梁和边梁的抗弯惯矩需要乘以1.4294u*Y2e.U3S7c中梁修正抗弯惯距= 0.604边梁修正抗弯惯距= 0.597而在计算中跨横向力分布系数,中跨的中梁和边梁的抗弯惯矩需要乘以1.818~9t/z6`.l:O2B!j中梁修正抗弯惯距= 0.769边梁修正抗弯惯距= 0.760三、左板惯矩右板惯矩计算中跨:边跨=30:30=1:1由《梁桥下册》P204页等截面连续梁等效简支梁刚度修正系数表:左板惯矩右板惯矩就是等刚度桥面板抗弯惯矩,他是考虑相邻两片主梁间桥面板的连接作用,其宽度取相邻横梁间距,翼板厚度取靠近主梁梁肋d1/3处的厚度,详细说明请参照《公路桥梁荷载横向分布计算》李国豪石洞编第22页.v+C,A&E:q't3g二跨连续梁三跨连续梁四跨连续梁下面就输出2列车的横向力分布系数,其他的只需把车列数修改一下就可以了,这里就不再输出了.1、边跨横向分布系数计算文档描述:边跨跨中横向分布系数任务标识:边跨跨中计算方法:刚接板梁法------------------------------------------------------------结构描述:主梁跨径:30.000m材料剪切模量/弯曲模量=0.430梁号梁宽弯惯矩扭惯矩左板宽左惯矩右板宽12.0750.5970.0150.900.97522.150.6040.0150.9750.3010.97532.150.6040.0150.9750.3010.97542.150.6040.0150.9750.3010.97552.150.6040.0150.9750.3010.97562.0750.5970.0150.9750.3010.9------------------------------------------------------------桥面描述:人行道分隔带车行道中央分隔带车行道分隔带人行道0.5011.750.0000.000000.5左车道数=2,右车道数=0,不计车道折减汽车等级:汽车-20级挂车等级:无挂车荷载人群集度:0.000KPa------------------------------------------------------------影响线数值:坐标X1#梁2#梁3#梁4#梁5#梁00.5620.4080.2460.085-0.074桥面中线距首梁距离:对于杠杆法和刚性横梁法为桥面的中线到首梁的梁位线处的距离;对于刚接板梁法则为桥面中线到首梁左侧悬臂板外端的距离,用于确定各种活载在影响线上移动的位置。这里所说的桥面的中心线仅指图示中的中央分隔带中心线,当我在左面输入L4=0.5L2=11.75右侧输入R4=0.5时,桥面中线距首梁是12.25;如果我在左面输入L4=0.5,右面输入R2=11.75 R4=0.5,这是桥面中线距首梁就是0.5,这么说大家应该知道怎么回事了吧,其实很简单的10.4970.3690.2330.099-0.0352.0750.4320.330.2210.1130.0053.150.3650.2890.2080.1270.0454.2250.2980.2490.1950.1410.0865.30.2310.2080.1820.1550.1276.3750.1640.1670.1680.1680.1677.450.0980.1270.1550.1820.2088.5250.0320.0860.1410.1950.2499.6-0.0340.0450.1270.2080.28910.675-0.10.0050.1130.2210.3311.75-0.164-0.0350.0990.2330.36912.75-0.227-0.0740.0850.2460.408------------------------------------------------------------横向分布系数计算结果:梁号汽车挂车人群满人特载车列10.690000020.5540000030.4080000040.4080000050.5540000060.68900000文档描述:边跨支点横向分布系数在桥博士中采用杠杆法文档描述:边跨支点横向分布系数任务标识:边跨支点计算方法:杠杆法------------------------------------------------------------结构描述:主梁间距:5*2.15m------------------------------------------------------------桥面描述:人行道分隔带车行道中央分隔带车行道分隔带人行道0.5011.750.0000.000000.5左车道数=2,右车道数=0,不计车道折减汽车等级:汽车-20级挂车等级:无挂车荷载人群集度:0.000KPa------------------------------------------------------------影响线数值:坐标X1#梁2#梁3#梁4#梁5#梁0100002.15010004.3001006.45000108.60000110.7500000------------------------------------------------------------横向分布系数计算结果:梁号汽车挂车人群满人特载车列10.5790000020.780000030.780000040.7790000050.7790000060.58100000------------------------------------------------------------计算成功完成2、中跨横向分布系数计算文档描述:中跨跨中横向分布系数任务标识:中跨计算方法:刚接板梁法结构描述:主梁跨径:30.000m材料剪切模量/弯曲模量=0.430梁号梁宽弯惯矩扭惯矩左板宽左惯矩右板宽12.0750.760.0150.900.97522.150.7680.0150.9750.3010.97532.150.7680.0150.9750.3010.97542.150.7680.0150.9750.3010.97552.150.7680.0150.9750.3010.97562.0750.760.0150.9750.3010.9------------------------------------------------------------桥面描述:人行道分隔带车行道中央分隔带车行道分隔带人行道0.5011.750.0000.000000.5左车道数=2,右车道数=0,不计车道折减汽车等级:汽车-20级挂车等级:无挂车荷载人群集度:0.000KPa------------------------------------------------------------影响线数值:坐标X1#梁2#梁3#梁4#梁5#梁00.5690.4110.2460.084-0.07710.5020.3720.2340.098-0.0382.0750.4360.3320.2220.1120.0023.150.3680.2910.2090.1260.0434.2250.2990.250.1960.140.0855.30.2310.2090.1830.1550.1266.3750.1640.1670.1690.1690.1677.450.0960.1260.1550.1830.2098.5250.030.0850.140.1960.259.6-0.0370.0430.1260.2090.29110.675-0.1040.0020.1120.2220.33211.75-0.168-0.0380.0980.2340.37212.75-0.232-0.0
本文标题:简支T梁(30m)横向分布系数计算
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