基于Pushover法的曲线桥地震波输入最不利角度分析

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.

Pushover-method-based analyses of critical angle to the seismic response of curved bridges

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 principle of Pushover method.The formula to calculate the critical angle was gained with non-liner Pushover method.Through the case of a curved bridge,the critical angle to the seismic response of the curved bridge was calculated with the non-linear statically analyt...