首页|形状记忆合金摩擦摆层间隔震结构抗震性能研究

形状记忆合金摩擦摆层间隔震结构抗震性能研究

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为了提升层间隔震结构的抗震性能,提出形状记忆合金摩擦摆(shape memory alloy friction pendulumn bearing,SMAFP),并基于形状记忆合金旗帜形滞回特性给出形状记忆合金摩擦摆及其层间隔震结构参数优化方法.以形状记忆合金和传统摩擦摆支座的理论模型为基础推导得到形状记忆合金摩擦摆模型的理论模型,并通过OpenSees平台建立形状记忆合金摩擦摆数值模型,通过与试验结果对比验证数值模型可靠性.在此基础上,以某大底盘单塔层间隔震结构为研究对象,以所提出的SMAFP层间隔震结构参数优化方法对形状记忆合金摩擦摆中形状记忆合金装置的屈服力进行优化,并基于最优屈服力进一步研究该参数优化方法的有效性及形状记忆合金摩擦摆层间隔震结构的抗震性能.结果表明:基于韧性性能的参数优化方法可有效得到形状记忆合金摩擦摆的最优参数;采用最优参数的形状记忆合金摩擦摆层间隔震结构复位性能显著提升,可有效减小支座峰值位移、支座残余位移,同时可有效控制结构柱底剪力、顶层绝对加速度、层间位移增量;支座峰值位移减幅达11.4％,支座残余位移减幅达48.5％,结构柱底峰值剪力、顶层峰值绝对加速度增幅均控制在10.0％以内.
Study on seismic performance of inter-story isolation structure with shape memory alloy friction pendulum bearings
To improve the seismic performance of the inter-story isolation structures,a shape memory alloy friction pendulum bearing(SMAFP)was proposed and a parametric optimal design method for SMAFP system was also developed based on the flag shape hysteretic behavior of the SMA.First,the hysteretic force-displacement relationship of the SMAFP was derived based on those of the SMA device and FPB.The numerical model of the SMAFP was developed in OpenSees platform.The reliability of the numerical model was validated by comparing with the test results.Then,a single tower structure with large podium inter-story structure was selected as an example structure.Optimization of the yield force of SMA device in SMAFP was conducted by using the proposed parametric optimal design method for SMAFP system.Using the optimal yield force,the effectiveness of the parametric optimal design method and the seismic mitigation efficiency of the inter-story isolation structure with SMAFPs were further investigated.Results show that the optimum parameters of the SMAFP system are achieved based on the parametric design method with resilient design concept.The re-centering performance of the inter-story isolation structure with SMAFP system are effectively improved using the optimum parameters.The SMAFP system can effectively reduce the residual displacement and peak displacement of bearings,and also effectively suppress the increments of the base shear of the columns,peak acceleration at the top of the structure and inter-story displacement.In particular,the reduction in the peak displacement of bearings reaches 11.4％,that in the residual displacement reaches 48.5％.The increases in the peak base shear of the columns,peak acceleration at the top of the structure are all suppressed to be within 10％.

inter-story isolationfriction pendulum bearingshape memory alloyoptimized designnumerical modelingseismic performance

冼志彬、谭平、郑文智、陈华霆、刘彦辉、杨奎

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广州大学土木工程学院,广东广州 510006

广州大学工程抗震减震与结构安全教育部重点实验室,广东广州 510006

层间隔震 摩擦摆支座 形状记忆合金 优化设计 数值建模 抗震性能

国家重点研发计划国家自然科学基金项目国家自然科学基金项目教育部创新团队项目

2021YFC31007005237829252108278IRT13057

2024

10.14006/j.jzjgxb.2023.0342

建筑结构学报
中国建筑学会

建筑结构学报

CSTPCD北大核心
影响因子：1.546
ISSN：1000-6869
年,卷(期)：2024.45(8)
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