曲面隔震结构的动力模型与振动台试验研究

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (9) : 35-43.

论文

曲面隔震结构的动力模型与振动台试验研究

田坤，刘文光，孙实，何文福

作者信息 +

Dynamic model and shaking table tests for curved surface isolated structures

TIAN Kun, LIU Wenguang, SUN Shi, HE Wenfu

Author information +

文章历史 +

摘要

近年来超越最初设计地震的强震频繁发生，普通隔震结构在超设计地震作用下存在隔震层位移过大、支座剪断、甚至会造成隔震建筑与周围挡土墙发生严重碰撞的风险。本文提出了利用隔震层曲面特征及结构重力效应的曲面隔震新型隔震结构体系，控制隔震结构在强震作用下的隔震层位移响应。针对新提隔震结构体系建立了将隔震支座倾斜布置的简化单质点分析模型，并且对其加速度传递系数和位移传递系数进行了理论分析。设计制作了曲面隔震结构5层钢框架模型，与平面隔震结构模型和非隔震结构模型分别进行了地震模拟振动台试验。试验结果表明，曲面隔震结构加速度响应较普通隔震结构有所放大，显著小于抗震结构，曲面隔震结构的隔震层位移则比普通隔震结构明显减小，试验结果与理论研究结果相符。

Abstract

Ordinary isolated structure exists excessive displacement of isolation layer, bearing damage and even the collision of isolated structure and retaining walls under beyond-design basis earthquake. This paper puts forward a curved surface isolated structure system which using the surface characteristics of the isolation layer and the gravity effect of the structure to reduce the displacement of the isolation layer. A simplified single-particle model of the curved surface isolated structure is set up which the isolators are arranged inclined and the acceleration transfer factor and displacement transfer factor are analyzed theoretically. Finally, a five-story steel frame model of curved surface isolated structure is produced and the shaking table tests are conducted on the curved surface isolated structure model, normal isolated structure and non-isolated structure. The test results show that the acceleration response of the curved surface isolated structure is increased but the displacement of the isolation layer in reduced compare to the normal isolated structure, and the acceleration response of the curved surface isolated structure is obviously reduced relative to the non-isolated structure.

导出引用

田坤，刘文光，孙实，何文福. 曲面隔震结构的动力模型与振动台试验研究[J]. 振动与冲击, 2019, 38(9): 35-43

TIAN Kun, LIU Wenguang, SUN Shi, HE Wenfu. Dynamic model and shaking table tests for curved surface isolated structures[J]. Journal of Vibration and Shock, 2019, 38(9): 35-43

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