摘要
本文应用一维复合应变波理论和特征线差分法,研究覆盖土层的非线性地震响应。为了较真实地反映土在不规则循环加载条件下的本构关系,本文采用了多屈服面运动硬化弹塑性模型。此外,在覆盖层与基岩半空间的界面上,本文引进了弹性边界条件,它能模拟波在半空间介质中的传播过程,从而使数值分析结果更加接近实际。本文为南浦大桥提供的16组沿深度分布的地震加速度时程,已经应用于南浦大桥的抗震设计中。
In this paper, nonlinear earthquake responses of horizontal soil layers are considered based on the theories of one-dimensional strain waves and finite difference method along the characteristic lines. The elasto-plastic multiyield surface constitutive model with a kinematic hardening rule is adopted to model the nonlinear hysteretic behavior of soil under irregular cyclic loading. In addition,the bedrock is modelled as a half space so that the radiation damping is included in the analysis. The earthquake acceleration time histories of 16 groups along the main piers of Nanpu Bridge which are calculated using the present method have been used for the seismic design of the bridge.
出处
《地震工程与工程振动》
CSCD
北大核心
1992年第4期30-39,共10页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金
