新建减震结构优化设计方法-《建筑科学与工程学报》

文章信息/Info

Author(s):: CHEN Min, LIU Chang, ZOU Yin-sheng; School of Civil Engineering and Mechanics, Central South University of Forestry and Technology

Keywords:: damping structure; optimal design; vibration isolation; vibration modal analysis; timehistory analysis

摘要:: 基于隔震理论提出减震结构优化设计方法，对某8度区11层框架结构进行了减震设计，通过附加粘滞阻尼器达到设防目标，根据振型分析调整隔震层层高，使安装阻尼器楼层位置降低至底部2层；将选取的7组加速度时程曲线分为4种工况，采用ETABS对减震结构进行了多遇地震作用下的时程分析，比较了各工况下阻尼器耗能总量和最大层间位移角。研究结果表明：将主体结构与减震装置看作有机整体对减震结构进行设计可取得较好的减震效果；将隔震层主体结构抗侧刚度作为减震装置设计参数，使隔震层基本周期与场地特征周期相等可取得最佳减震效果。

Abstract:: According to the theory of vibration isolation, optimal design method for damping structure was proposed. The authors conducted a seismic design for an 11storey frame structure in the 8 degree seismic area by the viscous dampers. Based on adjusting the storey height of isolation layer by vibration modal analysis, the viscous dampers were installed in the two bottom storeys. The selected 7 groups of acceleration timehistory curves were divided into four work conditions, the timehistory of the energy dissipation structure under the frequent earthquake was analyzed with ETABS, and the total energy consumption of damper and the maximum interstory drift under each work condition were compared. The study results show that treating the main structure and damping device as an integrated whole to design can produce more desirable energy dissipation effects. The lateral stiffness of the main structure of isolation layer can be used as the design parameter of damping devices, so that the fundamental period of isolation layer can equal to the site characteristic cycle to obtain the best energy dissipation effects.