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Development and Mechanical Performance of a New Kind of Bridge Seismic Isolator for Low Seismic Regions

机译:低地震区新型桥梁隔震器的研制与力学性能

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摘要

The concept of fibre-reinforced plate elastomeric isolator (FRPEI) is introduced firstly in this paper. Three FRPEI specimens have been constructed to evaluate the mechanical performance of the isolators by performing vertical and horizontal tests. The research focuses on the compression stiffness, the shear stiffness, the hysteretic characteristic and the vertical bearing capacity of the isolators. The experimental results show that the mechanical performance of FRPEIs can meet the requirements of bridge rubber bearings and the energy dissipation capacity is better than that of general laminated rubber bearings. Therefore, it is feasible to use FRPEIs in seismic isolation of short span bridges in low seismic regions. Theoretical and finite element methods have also been employed and the deformation assumptions applied in the theoretical method are also verified by FEM. By comparing the differences of the results of different methods, the effectivenesses of the theoretical and finite element methods are evaluated and some considerations on isolator design are proposed.
机译:本文首先介绍了纤维增强板式弹性体隔离器(FRPEI)的概念。已经构建了三个FRPEI标本,以通过执行垂直和水平测试来评估隔离器的机械性能。研究重点是隔离器的压缩刚度,剪切刚度,滞后特性和竖向承载力。实验结果表明,FRPEIs的力学性能可以满足桥梁橡胶轴承的要求,其耗能能力优于普通的叠层橡胶轴承。因此,在低地震区的短跨度桥梁隔震中使用FRPEI是可行的。还采用了理论和有限元方法,并且通过有限元方法验证了在理论方法中应用的变形假设。通过比较不同方法结果的差异,评估了理论方法和有限元方法的有效性,并提出了隔离器设计的一些注意事项。

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