中文摘要：

鉴于曲线桥每个墩柱的最大反应依赖于不同的地震输入角度,运用时程分析工作量大,本文基于Pushover法基本原理,考虑曲线桥墩柱底部曲率与地震动力反应的关系,提出了曲线桥在地震作用下动力响应的最不利角度的简化计算方法.通过具体曲线桥动力反应分析算例,采用非线性静力Pushover分析方法,计算了曲线桥的地震动最不利输入角度;同时结合0～180°区间内的动力时程分析方法结果比较,验证了该方法在确定曲线桥地震反应最不利输入角度方面的适用性.

英文摘要：

Considering the complexity of time history analysis on each curved bridge pier whose maximum response relies on the seismic angle, a relationship between the curvature at the bottom of the pier and the seismic response was presented based on the prin- ciple of Pushover method. The formula to calculate the critical angle was gained with non-liner Pushover method. Through the ease of a curved bridge, the critical angle to the seismic response of the curved bridge was calculated with the non-linear statically analytical method. The results of dynamical time history analysis in the range from 0° to 180° indicate that the formula is accurate to determine the critical angle to the seismic response of curved bridges.