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Comparing Rubber Bearings and Eradi-Quake System for Seismic Isolation of Bridges

机译:比较橡胶轴承和Eradi-Quake系统用于桥梁的地震隔离

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摘要

Seismic isolation systems have been used worldwide in bridge structures to reduce vibration and avoid collapse. The seismic isolator, damper, and Shock Transmission Unit (SUT) are generally adopted in the seismic design of bridges to improve their seismic safety with economic efficiency. There are several seismic isolation systems, such as Natural Rubber Bearing (NRB), Lead Rubber Bearing (LRB), and the Eradi-Quake System (EQS). EQS as a new technology is expected to effectively reduce both seismic force and displacement, but there is still some need to verify whether it might provide an economical and practical strategy for a bridge isolation system. Moreover, it is important to guarantee consistent performance of the isolators by quality control. A comparative evaluation of the basic properties of the available seismic isolators is thus necessary to achieve a balance between cost-effectiveness and the desired performance of the bridge subjected to extreme loading. Accordingly, in this study, the seismic response characteristics of the seismic isolation systems for bridges were investigated by conducting compressive test and compressive-shear test on NRB, LRB, and EQS.
机译:地震隔离系统已在全球范围内使用桥梁结构,以减少振动并避免崩溃。岩壁隔离器,阻尼器和冲击传动装置(SUT)通常采用桥梁的地震设计,以提高其具有经济效率的地震安全性。有几种地震隔离系统,如天然橡胶轴承(NRB),铅橡胶轴承(LRB)和Eradi-Quake系统(EQS)。 EQS作为一种新技术有望有效减少地震力和位移,但仍有一些需要验证它是否可以为桥隔离系统提供经济和实用的策略。此外,重要的是保证通过质量控制的隔离器的一致性性能。因此,需要对可用地震隔离器的基本性质进行比较评价,以实现成本效益与经过极端负荷的桥梁所需性能之间的平衡。因此,在本研究中,通过在NRB,LRB和EQS上进行压缩测试和压缩剪切测试,研究了桥梁地震隔离系统的地震反应特性。

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