耗能减振结构基于性能简化抗震设计方法研究  

A study on simplified performance-based seismic design method for structures with dampers

作　　者：周云[1] 汤统壁[1] 邓雪松[1] 吴从晓[1] 

机构地区：[1]广州大学,广东广州510006

出　　处：《土木工程学报》2008年第6期14-21,共8页China Civil Engineering Journal

基　　金：国家自然科学基金(50678040);科技部重大基础研究前期研究专项项目(2004CCA03300);广州市科技攻关重大项目(2004Z1-E0051)

摘　　要：介绍位移相关型耗能器的性能特性及其分析模型,针对安装位移相关型耗能器结构的特点,在现有耗能减振结构性能设计研究成果的基础上,提出耗能减振结构基于性能的简化抗震设计方法;采用SAP2000软件对某7层钢框架进行性能设计和基于不同性能目标的多种方案的对比分析。分析结果表明:采用等效单自由度(SDOF)耗能减振结构性能点对应的周期和阻尼比来预估加入耗能减振装置后原结构的实际周期和阻尼比是可行的;提出基于性能简化抗震设计方法是合理的,并且该种方法可判断耗能支撑应给结构提供附加刚度及初始屈服位移的较优的性能参数。The properties and analysis model of displacement-dependent dampers are introduced. Based on relevant research results, a simplified performance-based seismic design method for structures with displacement-dependent dampers is developed. Utilizing the SAP2000 finite-element program, a 7-story steel frame structure with displacement-dependent energy dissipation devices is designed using the performance-based method, and comparisons and analyses of several schemes with different performance objectives are conducted. The results indicate that it is reasonable for estimating the periods and damping of the original structure with energy dissipation devices by utilizing performance points of the equivalent single-degree-of-freedom （SDOF） system with damper, the proposed method is valid, and the added optimum stiffness and initial yield displacement of dissipation energy brace can be estimated by using the method.

关 键 词：基于l生能抗震设计 耗能器 性能目标 

分 类 号：TU352.1[建筑科学—结构工程]