框剪结构基于性能的减震设计方法研究  

Research on the performance-based damping design of frame-shear structures

作　　者：陈子安 黄小宁 CHEN Zi'an;HUANG Xiaoning(School of Civil Engineering,Qinghai University,Xining 810016,China;Key Laboratory of Energy-saving Building Materials and Engineering Safety of Qinghai,Xining 810016,China)

机构地区：[1]青海大学土木工程学院,青海西宁810016 [2]青海省建筑节能材料与工程安全重点实验室,青海西宁810016

出　　处：《青海大学学报》2023年第1期49-56,共8页Journal of Qinghai University

基　　金：青海省科学技术厅项目(2018-ZJ-938Q,2018-ZJ-T01);青海大学中青年科研基金项目(2018-QGY-4)。

摘　　要：为了降低建筑结构在地震作用下的动力响应,本文针对框剪结构提出一种基于性能的减震设计方法。通过对原结构进行静力弹塑性分析,在能力谱法的基础上求得结构的附加阻尼比,将附加阻尼比分配到结构的每一层,确定耗能减震装置的形式和布置方案,并使用该方法对一栋12层的框剪结构进行减震设计。同时,对采用减震设计的结构和不采用减震设计的结构进行动力弹塑性分析与对比。结果表明:基于性能的减震设计方法,可以有效减小结构的最大层间位移角和楼层最大位移,结构的基底剪力和层间最大加速度也相应减小,对于增强结构自身的耗能作用效果明显;相比于原结构减震率为34.84%,基于性能的减震设计方法取得较好的减震效果,且整个过程无需迭代。该方法适用于所提性能目标为主体结构保持弹性状态下的情况,采用该方法对结构进行减震设计可以实现既定水准下结构的抗震性能目标。A performance-based seismic design method for frame-shear structures is proposed to reduce the dynamic response of building structures under the earthquake.Through static elastoplastic analysis of the original structure,the additional damping ratio of the structure is obtained based on the capacity spectrum method.The additional damping ratio is allocated to each floor of the structure to determin the form and layout of energy dissipation devices.The method is used to design a 12-story frame shear wall structure for vibration reduction.Dynamic elastic-plastic analysis and comparison are carried out for the structure with and without damping design.The results show that the performance-based damping design method can effectively reduce the maximum inter story displacement angle and the maximum floor displacement of the structure.The base shear force and maxi-mum acceleration between floors are also reduced accordingly.It has obvious effect on increasing the energy consumption of the structure.The damping ratio is 34.84% compared with the original structure.The performance-based damping design method achieves good vibration reduction effect,which does not require iteration in the whole process.The method is applicable to the case where the proposed performance objective is to maintain the elastic state of the main structure.The damping performance target of the structure can be achieved by using the method under the given level.

关 键 词：能力谱法 弹塑性时程分析 基于性能设计 减震设计方法 

分 类 号：TU375[建筑科学—结构工程] TU352.1