水平和竖向地震作用下梁桥的地震反应分析

The Seismic Analysis of Beam Bridge with Combined Excitation of Vertical and Horizontal Shock

以某高速公路跨线四跨连续梁桥为研究对象,以El-centro波为激励,采用动态时程分析方法对该桥梁进行了考虑水平和竖向地震作用的地震反应分析。结果表明,相对于水平和竖向两向地震作用,仅考虑水平地震作用,桥梁的地震反应偏小,计算结果偏于不安全。

With the expressway over 4span beam bridge as the research objective and ELcentro wave as the excitation,the dynamic time history analysis method is adopted to carry out the seismic response of beam bridge in considering the vertical and horizontal seismic shocks. The results indicate that being relative to vertical and horizontal two dimentional seismic shocks,the seismic response of beam bridge with the horizontal shock is deviated to be small so that the calculation results are liable to unsafety.