基于响应比的简化黏滞阻尼器弹塑性设计方法研究  

Simple Elastic-plastic Design Method with Viscous Dampers Based on Structural Response Ratio

作　　者：沈华 翁大根[1] 张瑞甫[1] 王庆华[1,2] SHEN Hua;WENG Dagen;ZHANG Ruifu;WANG Qinghua(Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China;College of Civil Engineering Department,Nantong Vocational University,Nantong 226007,China)

机构地区：[1]同济大学防灾减震工程系,上海200092 [2]南通职业大学建筑工程学院,江苏南通226007

出　　处：《结构工程师》2019年第1期1-9,共9页Structural Engineers

基　　金：国家自然科学基金(51308418);南通市科技计划项目(MS12017027-4);上海浦江人才计划(17PJ1409200)

摘　　要：安装黏滞阻尼器能有效提高结构的抗震性能,已在工程实践中被大量应用。引入结构响应比的概念,并在响应比的基础上给出了简化黏滞阻尼器的弹塑性设计方法。在设计过程中,首先,使用pushover方法确定黏滞阻尼器的安装楼层并计算响应比值;然后,根据响应比直接求出黏滞阻尼器需提供的近似附加阻尼比;最后,计算并确定黏滞阻尼器的相关设计参数。为验证提出设计方法的合理性和有效性,对一个六层的钢筋混凝土框架结构进行了时程分析验证,结果表明:设计的减震结构能很好地满足不同地震水准下的性能设计目标,并可以直接求出阻尼器提供的附加阻尼比,避免了大量的迭代计算。Viscous damper can effectively improve the seismic performance of structure and have been widely applied in practical engineerings. In this paper,a simple elastic-plastic design method is proposed for structure with viscous damper based on structural response ratio. In the design process, firstly, the arrangement of viscous dampers and the structural response ratio are determined according to the result of pushover analysis;secondly, the require damping ratio that should be provided by the additional viscous dampers is directly evaluated based on the structural response ratio;lastly, the design parameters of viscous dampers can be calculated. To illustrate and verify the effectiveness of the proposed design method,a six-story reinforced concrete frame is analyzed by using time history analysis. It is found that the proposed design method can adequately satisfy seismic performance targets under different seismic levels,and the addtional damping ratio that is provided by viscous dampers can be directly calculated without iterative calculations.

关 键 词：结构响应比 黏滞阻尼器 弹塑性设计方法 反应谱 

分 类 号：TU352.1[建筑科学—结构工程]