基于ABAQUS及MIDAS空间梁格法分析宽箱梁偏载系数  

Deflection coefficient of wide section box girder based on ABAQUS and MIDAS spatial beam lattice

作　　者：吴桐 王路遥 饶金成 窦传冬 李焕哲 WU Tong;WANG Lu-Yao;RAO Jin-Cheng;DOU Chuan-Dong;LI Huan-Zhe(School of Civil Engineering,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学建筑工程学院,哈尔滨150080

出　　处：《黑龙江大学工程学报（中英俄文）》2023年第3期97-104,共8页Journal of Engineering of Heilongjiang University

基　　金：黑龙江省省属高等学校基本科研业务费科研项目(2022-KYYWF-1055)。

摘　　要：宽箱梁结构体系偏载效应比较显著,计算不当可降低结构的安全储备,在极限状态下还可造成支座脱空,使结构处于及其危险的状态。采用ABAQUS及MIDAS空间梁格法对实例桥梁进行有限元建模,得到偏载系数理论值,并将其与CDN加载试验验证过的偏载系数实测值、通过经验系数法、偏心压力法、修正的偏心压力法、模态分析法等方法得到的偏载系数计算值进行比较,结果表明,模态分析法更适合于宽桥偏载系数的计算,对今后的桥梁设计有一定的指导意义。Wide box girder is a complex spatial structure system with large cantilever width and web spacing,The deflection effect of this structural system is significant.If the calculation is not done properly without sufficient safety reserve,the support overhang may occur in the limit state,thus putting the structure in a dangerous condition.For this reason,ABAQUS and MIDAS spatial beam lattice method is used to finite element model the example bridge,and obtains the theoretical calculated value of eccentricity coefficient,and compares it with the measured value of eccentricity coefficient verified by CDN loading test and the calculated value of eccentricity coefficient obtained by empirical coefficient method,eccentric pressure method,modified eccentric pressure method and modal analysis method.The results show that the modal analysis method is more suitable for the calculation of the eccentricity coefficient of wide bridges,which is a guideline for the future bridge design.

关 键 词：ABAQUS MIDAS 宽箱梁 偏载系数 有限元建模 CDN荷载试验 简化计算 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]