【摘要】 结合某城市一立交工程匝道高架曲线箱梁桥的工程实例,采用大型有限元分析程序ANSYS,选取空间梁单元建立动力计算模型,研究了曲线箱梁桥的动力特性;并选取三条地震波在桥的纵、横向同时进行桥梁地震作用下的时程分析,给出了曲线箱梁和桥墩的内力、位移时程反应,并与反应谱法的计算结果进行了比较。结果表明:低阶振型对桥墩的弯扭变形影响较大,反应谱法的计算结果偏小。更多还原

【Abstract】 Taking an engineering design case about a curved box-girders bridge,the dynamic calculating model of the curved box-girders bridge is created by the finite element analysis program ANSYS.The dynamic characteristic of the curved box-girders bridge is discussed,a time history analysis is conducted for the curved box-girders bridge subjected to three earthquake waves in the longitudinal and the lateral direction,and the internal force,displacement and the time history response of the curved box-girders and bridge pier are obtained,and are compared with the results of response spectrum method.The results indicate that lower frequency models of vibration have significant influence on bending and torsion deformation of bridge pier,the results of response spectrum method are smaller.更多还原