【摘要】 介绍了阻尼器直接与梁柱节点相连的改进肘型斜撑阻尼器的安装方式,引入了这种阻尼器位移和力的放大系数表达式。为了便于工程应用,基于中国抗震规范设计反应谱提出了附加改进肘型斜撑阻尼器结构的简化设计和分析方法。在该设计方法中,阻尼器的阻尼系数按正比于其所在楼层层间模态位移的原则进行分配,以满足给定的性能水平要求。使用与设计反应谱相匹配的人工波对采用3种阻尼器安装方式的结构进行了时程分析,验证该方法的有效性。结果表明:与传统肘型斜撑阻尼器体系和对角斜撑阻尼器相比,改进阻尼器安装方式不仅能显著减少楼层位移反应,而且能降低楼层剪力需求。更多还原

【Abstract】 An enhanced toggle-brace-damper installation configuration with the damper directly connected to the beam-column joint was introduced,and the magnification factors for damper displacement and force were investigated.Expression for prediction of equivalent linear viscous damping ratio provided by the enhanced toggle-damper-brace systems installed in a building was introduced.For practical application,a simplified design and analysis method of structure with additional improved toggle-brace-damper systems was proposed based on Chinese code for seismic design of response spectrum,in which the damping coefficients of the dampers proportional to the relative modal displacements in the corresponding stories were distributed over the height of a structure to satisfy the given performance objective.The validity of this method was verified by nonlinear dynamic analyses.The results show that compared with the conventional installation configurations of toggle-brace-damper and diagonal brace-damper,this improved damper installation configuration not only decreases significantly floor displacement response but also reduces story shear demands.更多还原