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MECHANISM OF SEISMIC RESPONSE OF A PC CABLE-STAYED BRIDGE SUBJECTED TO A LONG-PERIOD SEISMIC EXCITATION

机译:长期地震作用下PC悬索桥的地震反应机理

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摘要

In this study, the mechanisms associated with the seismic response of a long-period structure when subjected to a long-period seismic excitation are clarified. A typical scale cable-stayed bridge with prestressed concrete girders (PC cable-stayed bridge) was selected for analysis. First, we simulated long-period components of the ground motion at the site of the Ji-Lu Bridge, which was damaged in the 1999 Chi-Chi, Taiwan earthquake, and the damage of the bridge was assessed by nonlinear seismic analysis using the simulated ground excitations. Second, shaking table tests of a model PC cable-stayed bridge were carried out, in consideration of the similarity law, to clarify the mechanisms involved, focusing on the linear and nonlinear seismic responses of the tower and cables.
机译:在这项研究中,阐明了与长周期结构在长期地震激励作用下的地震响应相关的机制。选择典型的带有预应力混凝土梁的斜拉桥(PC斜拉桥)进行分析。首先,我们模拟了在1999年台湾集集地震中遭到破坏的吉鲁大桥工地的长周期分量,并通过非线性地震分析对该桥的损伤进行了评估。地面激励。其次,考虑到相似定律,对模型PC斜拉桥进行了振动台测试,以阐明所涉及的机理,重点是塔和电缆的线性和非线性地震响应。

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