论文部分内容阅读
以一座在建的多跨预应力混凝土连续梁桥为研究对象,建立空间有限元模型分析了其动力特性,进行了减隔震方案设计。分别通过反应谱法和非线性时程法分析了该桥采用减隔震措施前后的地震动力响应特性。通过抗震性能对比分析,研究了设置钢阻尼器对连续梁桥的减震效果。结果表明:阻尼器可以减小连续梁桥的地震反应,使墩底的内力分配均匀,有利于提高该类桥梁的抗震性能。
Taking a multi-span prestressed concrete continuous girder bridge under construction as a research object, a finite element model of the space was established to analyze the dynamic characteristics of the multi-span prestressed concrete continuous girder bridge. The dynamic response characteristics of the bridge before and after the anti-seismic measures were analyzed by response spectrum method and nonlinear time-history method respectively. By comparing the seismic performance, the damping effect of the steel damper on the continuous girder bridge is studied. The results show that the damper can reduce the seismic response of the continuous girder bridge and distribute the internal forces at the pier bottom uniformly, which is good for improving the seismic performance of such bridges.