地震作用下曲线连续刚构桥的响应分析与损伤评估

Abstract

曲线桥具有线形适应性强、造型美观等优点，在我国的公路和城市桥梁中得到了广泛的运用。而连续刚构的形式因为能合理调整结构的受力情况，且避免设置支座，也深受设计者的青睐。近年来，地震频发，曲线桥与相同跨径的直线桥相比震害显著，连续刚构桥也显示出一些自身的震害特点。本文在总结曲线桥抗震研究进展、常见震害特点以及地震反应计算理论与损伤评估方法的基础上，以一座曲线连续刚构桥为工程背景，进行反应谱分析与时程分析，研究该桥在地震作用下的响应以及对其进行地震作用下的损伤评估。首先通过计算对比，选择了脊梁单元模型模拟曲线连续刚构桥的主梁，并建立了演武大桥三维有限元模型。在E1地震作用水平下，通过0～180°旋转激...

Curved bridges have the advantages of great adaptability of roads and handsome shape, which has been widely used in high way and urban bridges; The continuous rigid frame bridge can adjust the force of bridge reasonably and avoid setting up bearing, so it has been favored by designers. In recent years, earthquakes occur frequently, the seismic damage of curved bridges are more significantly than t...