建筑结构学报2024，Vol.45Issue(8)：141-153,13.DOI:10.14006/j.jzjgxb.2023.0342
形状记忆合金摩擦摆层间隔震结构抗震性能研究
Study on seismic performance of inter-story isolation structure with shape memory alloy friction pendulum bearings
摘要
Abstract
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％.关键词
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Key words
inter-story isolation/friction pendulum bearing/shape memory alloy/optimized design/numerical modeling/seismic performance分类
建筑与水利引用本文复制引用
冼志彬,谭平,郑文智,陈华霆,刘彦辉,杨奎..形状记忆合金摩擦摆层间隔震结构抗震性能研究[J].建筑结构学报,2024,45(8):141-153,13.基金项目
国家重点研发计划(2021YFC3100700),国家自然科学基金项目(52378292,52108278),教育部创新团队项目(IRT13057). （2021YFC3100700）
