摘要
建立了层间隔震结构的多质点系简化模型及结构动力方程,采用Newmark时程分析法,利用MTALAB对层间隔震结构上下部结构采用Rayleigh阻尼模型时的不同参数取值方法进行研究.结果表明:采用不同振型阻尼比时,层间变形差异较小,但加速度响应特别是下部结构的加速度响应差异较大,取振型阻尼比ξ数值为1%时计算偏于安全;采用不同振型频率时,第2阶和第3阶2种情况的层间变形和加速度响应差别较小,取第3阶的情况下地震响应要大于取第2阶的情况,在实际工程中按第3阶取值时计算偏于安全;采用刚度相关型和Rayleigh型2种情况的层间变形和加速度响应差别较小,采用质量相关型加速度地震响应较大,在实际工程中采用质量相关型计算时偏于安全.
Multi-particles simplified model of inter-story isolated structure is constructed so as to analyze the taking values methods for different parameters when upper-lower structure of inter-story isolated structure adopts the Rayleigh damping mode. Result shows that when different model-damping ratios are utilized, the inter-story deformations differ slightly, but the acceleration responses are quite different, especially in the lower structure. When model-damping ratio is set as 1%, the calculation will be simply safe;if the structures are adopted with the 2order and the 3order, the differences of inter-story deformations and acceleration responses are small. The seismic response generated from the 3order is larger than the 2order, which means if the value is taken based on the 3order in practical engineering, the calculation would be safer;and if stiffness-related model and Rayleigh model are used respectively, the inter-story deformations and acceleration responses show small difference. However, when quality-related model is used, the seismic responses of accelerations are more violent. That is to say, in practical engineering, it is safer when the quality-related model is used to calculate the seismic responses of inter-story isolated structure.
作者
刘德稳
招继炳
盛冬发
周旺旺
Kaiming Bi
LIU Dewen;ZHAO Jibing;SHENG Dongfa;ZHOU Wangwang;Kaiming Bi(College of Civil Engineering,Southwest Forestry University,Kunming 650000,China;Key Laboratory of Earthquake Resistance and Absorption Engineering&Structure Safety of Ministry of Education,Guangzhou University,Guangzhou 510405,China;College of Civil Engineering,Curtin University,Perth,Western Australia,Australia)
出处
《湖南科技大学学报（自然科学版）》
CAS
北大核心
2022年第3期27-34,共8页
Journal of Hunan University of Science And Technology：Natural Science Edition
基金
国家自然科学基金资助项目(52168072,51808467)
云南省“万人计划”高层次人才支持项目资助(2020)。
