【摘要】 根据多跨连续梁桥的主要结构特点,采用简化的模型来模拟纵桥向的地震动力反应。通过求解简化模型的动力方程,分析了质量比对连续梁桥纵桥向的动力特性的影响,并用能量法推导了低阶振型地震反应的近似公式。通过与有限元方法的比较,验证了采用几个低阶振型组合计算的反应谱方法的可行性。更多还原

【Abstract】 Based on the key dynamic characteristics of multispan continuous bridges,a simplified analytical model was adopted to simulate the seismic response in span direction.The effects of mass ratio on dynamic Characteristics were investigated by solving the dynamic equation of the model.The approximate formula of seismic response were deduced based on Energy Conservation Law.Finally,in contrast with the finite element method,the feasibility of the proposed seismic response spectrum method of the combination of some lower modes was verified.更多还原