Cho Chang Beck, Kim Young Jin, Chin Won Jong, Lee Jin-Young
Department of Infrastructure Safety Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea.
School of Agricultural Civil & Bio-industrial Engineering, Kyungpook National University, Daegu 41566, Korea.
Materials (Basel). 2020 Nov 20;13(22):5247. doi: 10.3390/ma13225247.
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.
隔震系统已在世界各地的桥梁结构中得到应用，以减少振动并避免坍塌。在桥梁的抗震设计中，通常采用隔震器、阻尼器和冲击传递单元（SUT），以提高其抗震安全性并兼顾经济性。有几种隔震系统，如天然橡胶支座（NRB）、铅芯橡胶支座（LRB）和地震消除系统（EQS）。EQS作为一项新技术，有望有效降低地震力和位移，但仍有必要验证它是否能为桥梁隔震系统提供一种经济实用的策略。此外，通过质量控制来保证隔震器性能的一致性也很重要。因此，有必要对现有隔震器的基本性能进行比较评估，以便在成本效益和桥梁在极端荷载作用下的预期性能之间取得平衡。相应地，在本研究中，通过对NRB、LRB和EQS进行压缩试验和压缩剪切试验，研究了桥梁隔震系统的地震响应特性。
