加连梁柱串联隔震系统的弹性屈曲  

Elastic buckling of serial seismic isolation system connected with column and coupling beam

作　　者：杜永峰[1,2] 朱前坤[1] 李慧[2] 

机构地区：[1]兰州理工大学防震减灾研究所,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《中南大学学报（自然科学版）》2012年第5期1902-1907,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50778087,50978130);甘肃省科技支撑计划项目(090-GKCA040)

摘　　要：为了解决工程界比较关注的隔震建筑串联隔震系统的稳定性问题,建立基于传递矩阵法的临界荷载求解方法。该方法首先建立稳定性分析单个支座的场矩阵和连梁等效成抗弯弹簧的点矩阵;其次根据传递矩阵法建立串联隔震系统稳定性分析的特征矩阵,并根据所得特征矩阵建立其临界荷载的控制方程,该方法避免了繁琐的力学推导过程;最后通过计算两种不同型号的串联隔震系统的临界荷载和探讨参数变化对柱串联隔震系统稳定性的影响。研究结果表明:加连梁对提高柱串联隔震体系临界荷载不明显,建议隔震建筑下部结构应优先选用地下室悬臂柱方案。To solve the stability of series seismic isolation system connected with column and coupling beam,which concerned engineering field,the critical load governing equation based on transfer matrix method was established.First,field matrix of stability on single laminated rubber bearing and point matrix of stability on coupling beam were established;Secondly,characteristic matrix of the stability on series seismic isolation system and the stability governing equation based on the characteristic matrix were established,which avoided tedious mechanical derivation;Finally,the stability of two kinds of series seismic isolation system using semi-analytic method was calculated,and influence of parameters variation on the stability of series seismic isolation system was investigated.The results show that it is not obvious for the added coupling beam to improve the two columns in series of critical load of the isolation system and the basement cantilever column scheme should be preferred in the lower part of the structure of the isolated building.

关 键 词：串联隔震系统 稳定性 传递矩阵法 临界荷载 

分 类 号：TU352.1[建筑科学—结构工程]