串联隔震构件非线性力学性能试验研究

赵丽洁1,2,3,景烜光2,杜永峰3,沈金生1,2

振动与冲击 ›› 2023, Vol. 42 ›› Issue (5) : 21-29.

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (5) : 21-29.
论文

串联隔震构件非线性力学性能试验研究

  • 赵丽洁1,2,3,景烜光2,杜永峰3,沈金生1,2
作者信息 +

Test study on nonlinear mechanical properties of series isolation components

  • ZHAO Lijie1,2,3, JING Xuanguang2, DU Yongfeng3, SHEN Jinsheng1,2
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摘要

串联隔震构件作为变刚度、强非线性的组合构件,是柱顶隔震结构最脆弱且最敏感的部位。为能够对串联隔震构件的非线性力学性能有更深入地认识,本文对不同长细比和轴压比下串联隔震构件进行拟静力加载试验,分析不同长细比和轴压比下串联隔震构件的破坏现象和特点;分析长细比与轴压比对串联隔震构件的水平刚度、强度及力和位移关系等力学性能的影响,探究串联隔震构件在多次实时往复荷载作用下串联隔震构件非线性累积损伤引起力学性能演化规律。经对试验结果分析表明,构件的延性、耗能能力、极限位移均与长细比和轴压比呈负相关且表现出明显的非线性特征,长细比和轴压比的增加会对串联隔震构件的水平刚度、强度等一些非线性力学性能造成损伤劣化。

Abstract

As a combination of variable stiffness and strong nonlinear components, series isolation members are the most vulnerable and sensitive parts of column top isolation structures.In order to have a deeper understanding of the nonlinear mechanical properties of the series isolation members, this paper carried out pseudo-static loading tests on the series isolation members with different slenderness ratios and axial compression ratios, and analyzed the failure phenomenon and characteristics of the series isolation members with different slenderness ratios and axial compression ratios.The effects of slenderness ratio and axial pressure ratio on the horizontal stiffness, strength, force and displacement relations of series isolation components were analyzed, and the evolution law of mechanical properties of series isolation components caused by nonlinear cumulative damage under multiple real-time reciprocating loads was investigated. The analysis of test results shows that ductility, energy dissipation capacity and ultimate displacement of components are negatively correlated with slenderness ratio and axial compression ratio and show obvious nonlinear characteristics. The increase of slenderness ratio and axial compression ratio will cause damage and deterioration of some nonlinear mechanical properties such as horizontal stiffness and strength of series isolation components.

关键词

串联隔震构件 / 拟静力试验 / 非线性

Key words

series isolation member / quasi static test / nonlinear

引用本文

导出引用
赵丽洁1,2,3,景烜光2,杜永峰3,沈金生1,2. 串联隔震构件非线性力学性能试验研究[J]. 振动与冲击, 2023, 42(5): 21-29
ZHAO Lijie1,2,3, JING Xuanguang2, DU Yongfeng3, SHEN Jinsheng1,2. Test study on nonlinear mechanical properties of series isolation components[J]. Journal of Vibration and Shock, 2023, 42(5): 21-29

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