摘要
以某长江大桥非通航桥段的112m简支钢桁梁公铁两用桥作为工程背景,借助有限元软件Midas civil对全桥在不同移动荷载工况和不同时速的移动荷载作用下对主桁位移、内力和应力的最不利位置处进行时程分析,得到对主桁结构最不利影响的移动荷载工况和时速;将全桥移动荷载的动力放大系数(位移、应力)计算值与公路、铁路桥梁设计规范中移动荷载冲击系数的计算相比较和分析。
the 112m simple steel truss bridge of the non navigable section of a Yangtze River Bridge is taken as the engineering background.With the help of finite element software MIDAS civil,the time history analysis of the most unfavorable position of the main truss displacement,internal force and stress of the whole bridge under different moving load conditions and moving loads at different speeds per hour is carried out,and the moving load conditions and speeds that have the most adverse impact on the main truss structure are obtained;The dynamic amplification factor(displacement and stress)of the moving load of the whole bridge is compared and analyzed with the calculation of the impact factor of the moving load in the code for design of highway and railway bridges.
作者
周鹏
ZHOU Peng(Guangdong Provincial Railway Planning And Design Institute Co.,Ltd,Guangzhou 510000)
出处
《铁道勘测与设计》
2022年第4期25-30,共6页
Railway Survey and Design
关键词
钢桁梁桥
公铁两用桥
时程分析
动力放大系数
Steel truss bridge
Railway and Highway bridge
Time-history analysis
Dynamic amplification factor
