【摘要】 随着我国大跨度桥梁结构的发展,反应谱与桥梁结构的发展不相适应性日益严重。本文对大跨度桥梁结构应用规范反应谱时存在的若干问题,其中包括长周期反应谱值、反应谱组合方法、考虑地震动空间变化的反应谱方法、反应谱输入方向、综合影响系数和阻尼比等进行了总结和探讨,并指出值得进一步研究的问题,对于修正桥梁抗震设计规范具有一定的参考意义。更多还原

【Abstract】 The response spectrum has been developing along with the development of long span bridges.In the paper,some exiting problems in code response spectrum for long span bridges,such as long period spectrum value,techniques for response spectrum combination,seismic input direction,synthetical effect coefficient and damping ratio are summarized and discussed.The problems for future studies are pointed out.The results obtained in this paper provide reference values for revising the aseismic design specification of long span bridges.更多还原