【摘要】 以某曲线梁桥为对象,研究了梁端碰撞对该类型桥梁地震反应的影响。通过有限元软件SAP2000,建立空间杆系模型,采用时程法模拟分析多联曲线桥在地震荷载作用下的碰撞现象。分析结果表明,曲线桥在地震下的梁端纵桥向位移明显大于直线桥。对于多联曲线桥梁,即使各联情况完全相同,相邻联的主梁仍会产生碰撞。另外,随曲率半径的减小,碰撞向梁端的圆弧外侧集中。更多还原

【Abstract】 Taking some curved beam bridge for example,the influence of beam end collision to this type bridge earthquake response is researched in this paper.On the basis of finite element software SAP2000,space pole model is built to simulate and analyze collision phenomenon of multiple curved bridge under seismic load with time interval method.The results can show that:1) the longitudinal beam end displacement of curved bridge is bigger than that of linear bridge obviously;2) for multiple curved bridge,the main beam of adjacent group will still appear collision even if every group has same condition;3) collision will concentrate on arc outside with the reducing of curvature radius.更多还原