Numerical investigation of nonlinear static and dynamic behaviour of self-centring rocking segmental bridge piers
Numerical investigation of nonlinear static and dynamic behaviour of self-centring rocking segmental bridge piers
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DOI：
10.1016/j.soildyn.2019.105876
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发表时间：
2020
影响因子：
4
通讯作者：
E. Ahmadi;M. Kashani
中科院分区：
文献类型：
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作者：
E. Ahmadi;M. Kashani
加速桥梁施工 (ABC) 理念导致了预制后张分段 (PPS) 桥墩在桥梁施工中的广泛发展。目前，关于 PPS 桥墩非线性力学和动力学的文献非常缺乏。因此，该工作使用有限元 (FE) 框架对 PPS 桥墩的非线性静态和动态行为进行数值研究。进行了非线性静态和动态分析，并对非锥形和锥形 PPS 以及现浇 (CIP) 桥墩的结果进行了比较。结果发现，后张力、高宽比、桥墩轴力和节段数量对 PPS 桥墩的非线性行为有很大影响。高水平的激励振幅在 PPS 桥墩的共振频率处和周围表现出共存（高/低）振幅响应，并且逐渐变细增强了 PPS 桥墩中动态不稳定的可能性。还表明，PPS 桥墩的基本模式与 CIP 桥墩的第一种模式相似。
Accelerated Bridge Construction (ABC) philosophy has resulted in extensive developments of precast post-tensioned segmental (PPS) bridge piers in the bridge construction. Currently, there is a significant paucity in the literature on nonlinear mechanics and dynamics of PPS piers. Hence, this wok numerically investigates the nonlinear static and dynamic behaviour of PPS piers using a finite element (FE) framework. Nonlinear static and dynamic analyses are performed, and the results are compared for non-tapered and tapered PPS as well as cast-in-place (CIP) piers. It is found that post-tensioning force, aspect ratio, axial force of the pier, and number of segments highly affect nonlinear behaviour of the PPS piers. High levels of excitation amplitudes exhibit co-existing (high/low) amplitude responses at and around the resonant frequency of the PPS piers, and tapering enhances the probability of dynamic instability in the PPS pier. It is also shown that the fundamental mode of the PPS piers is similar to the first mode of a CIP bridge pier.