Effect of Rocking Foundations on Seismic Behavior of Horizontally Curved Bridges with Different Degrees of Curvature
Effect of Rocking Foundations on Seismic Behavior of Horizontally Curved Bridges with Different Degrees of Curvature
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发表时间：
2012
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通讯作者：
A. Saad;D. Sanders;I. Buckle
中科院分区：
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作者：
A. Saad;D. Sanders;I. Buckle
设计在中小地震后无损伤，在大地震后损伤有限的桥梁是很重要的。实现这一目标的一种方法是允许桥墩的基础摇摆。在这项研究中，不同曲率的桥梁进行了分析，不同的基础尺寸下的地震荷载，使用时程分析。对不同桥梁构件的需求分布与无摇摆系统进行了比较。初步研究结果表明，摇摆减少了下部结构的损坏，但增加了上部结构和桥台的需求。水平弯曲度也是影响地震荷载需求分布的一个因素。作为该项目的一部分，使用振动台对其中一座分析过的曲线桥进行了五分之二比例的测试。本文还解释了实验装置。
It is important to design bridges that can have no damage after small and medium earthquakes and limited damage after significant earthquakes. One method for achieving this objective is to allow the foundations of the bridge piers to rock. In this study, bridges with different curvatures were analyzed with different footing sizes under seismic loads, using time history analyses. Distribution of the demands on different bridge components were compared to systems without rocking. Initial findings indicate that rocking reduces the damage in the substructures, but increases the superstructure and the abutments demands. The degree of horizontal curvature is also a factor that contributes to the distribution of the seismic load demands. As part of the project, a two-fifth scale of one of the analyzed curved bridges was tested using shake tables. The experimental setup is also explained in this paper.