| 金属橡胶支座剪切性能试验研究 |
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| 引用本文： | 杜骞,夏修身.金属橡胶支座剪切性能试验研究[J].西北地震学报,2021,43(5):1176-1182,1196. |
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| 作者姓名： | 杜骞 夏修身 |
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| 作者单位： | 兰州交通大学 土木工程学院, 甘肃 兰州 730070 |
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| 基金项目： | 国家自然科学基金项目（52068041）；兰州交通大学青年科学基金项目（2020020）；兰州交通大学天佑创新团队（TY202007） |
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| 摘 要： | 针对一种金属橡胶支座，研究其剪切性能。进行3种压应力下的拟静力试验，分析竖向压力和水平剪切变形对支座剪切性能的影响；以试验数据为基准，建立支座剪切性能与压应力之间的相关性经验公式，提出能够近似模拟试验曲线的三线性恢复力模型。试验研究表明，随着支座剪切变形的增大，支座等效刚度及耗能增大，等效阻尼比减小，屈服力基本保持不变，滞回曲线由梭形逐渐变为反S型，当剪切应变大于25%时支座出现刚度硬化现象；随着支座压应力增大，支座的耗能、屈服力、等效刚度及等效阻尼比均增大。
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| 关 键 词： | 金属橡胶支座 剪切性能 拟静力试验 滞回性能 三线性恢复力模型 |
| 收稿时间： | 2021/4/9 0:00:00 |
Experimental study on shear behavior of metal rubber bearings |
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| DU Qian,XIA Xiushen.Experimental study on shear behavior of metal rubber bearings[J].Northwestern Seismological Journal,2021,43(5):1176-1182,1196. |
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| Authors: | DU Qian XIA Xiushen |
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| Institution: | School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China |
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| Abstract: | To study the shear performance of a kind of metal rubber bearing, the influences of vertical pressure and horizontal shear deformation on the shear performance of metal rubber bearing were analyzed by quasi-static tests under three kinds of compressive stress. Through the analysis of test data, the empirical formula of the correlation between the bearing shear performance and the compressive stress was established, and a trilinear restoring force model which can approximately simulate the test curve was proposed. The results showed that with the increase of bearing shear deformation, the equivalent stiffness and energy consumption of the bearing increase and the equivalent damping ratio decreases, while the yield force basically remains unchanged, and the hysteretic curve gradually changes from shuttle shape to anti-S shape. When the shear strain is greater than 25%, the stiffness hardening phenomenon appears. With the increase of compressive stress, the energy consumption, yield force, equivalent stiffness and equivalent damping ratio of the bearing increase. |
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| Keywords: | metal rubber bearing shear performance quasi-static test hysteretic performance trilinear restoring force model |
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