【摘要】 针对铁路桥梁中应用广泛的单柱式桥墩 ,考虑多种跨度 ,多种墩高和多种场地及多种地震烈度的情况 ,在进行大量的桥墩结构线性和非线性弹塑性动力计算分析的基础上 ,通过对大量数据的统计分析 ,得到桥墩线弹性最大弯矩比和非线性位移延性比参数的变化规律 ,基于概率性的结构随机地震反应理论 ,建立了由线弹性动力分析结果来估算桥墩结构的位移延性响应的方法。更多还原

【Abstract】 A new method for evaluating the ductile seismic response of bridges is developed. The study is based on the assumption that the ductile response of the bridge structure is related to the linear response, and the variation of which could cover the non-linear one. Statistic and analysis of a large amount of data are done considering different spans, pier heights, section sizes, site conditions as well as the seismic intensity. It is proved that the assumption complies with results of statistic analysis. A simplified method, which could evaluate ductile seismic responses according to linear analysis results, is proposed.更多还原