学术论文

      底部框架砌体层间隔震结构隔震参数优化分析

      Parameter optimization of inter-storey isolation structure for lower masonry frame

      摘要:
      为了提高底部框架砌体结构的抗震性能,在上部砌体结构底部设置了隔震装置,形成底部框架砌体层间隔震结构.给出了该结构的振动方程,根据随机振动理论,采用非线性数学规划法研究了该结构下部框架顶层和上部砌体的位移响应方差,探究了隔震装置阻尼比及上下部结构频率比和质量比对位移响应方差的影响规律,表明该结构隔震层阻尼比宜大于0.2,上下结构频率比宜不超过0.8,上下结构质量比不宜小于0.5.
      Abstract:
      In order to improve the seismic performance of lower masonry frame, an isolation device was installed at the bottom of the upper structure of a multistory masonry building, and the storey isolation structure for lower masonry frame of the building was established.The vibration equation of the structure was derived, and according to the random vibration theory, the nonlinear mathematical programming method was adopted to study the variance of the displacement response of the top of the lower frame and the upper structure, from which the influence of the damp ratio of the isolation device were studied.The influence of frequency ratio and mass ratio of the upper structure to the lower frame on the displacement response variance was studied.The results indicate that the damp ratio of the isolation device should be larger than 0.2, that the frequency ratio of the upper structure to the lower frame should be less than 0.8, and that the mass ratio of the upper structure to the lower structure should not be less than 0.5.
      作者: 张敏 李亚飞
      Author: ZHANG Min LI Ya-fei
      作者单位: 广西科技大学土木建筑工程学院,广西柳州,545006
      年,卷(期): 2017, 42(2)
      分类号: TU352.1
      在线出版日期: 2017年5月16日
      基金项目: 国家自然科学基金资助项目,研究生教育创新计划项目