基于履带式阻尼器的框架-摇摆墙耗能结构抗震性能研究

Research on seismic performance of rocking wall-frame structure with crawler damper

介绍了基于履带式阻尼器的框架-摇摆墙耗能结构及其抗震性能的研究分析.框架-摇摆墙结构能改善结构的变形机制,提高结构抗震性能,缺点是削弱了结构刚度,使各层位移加大.而履带式阻尼器构造简单、安装方便、价格低廉,且能在2个方向上帮助结构耗能,帮助结构提升抗震性能.通过对框架剪力墙结构、框架-摇摆墙结构及基于履带式阻尼器的框架-摇摆墙耗能结构进行静力非线性推覆分析及动力非线性时程分析,对比研究3种结构的抗震性能.结果表明:框架-摇摆墙结构较框架剪力墙结构层间变形趋于一致,结构损伤趋于均匀,属整体破坏机制,相比框架剪力墙结构更加符合规范要求的"强柱弱梁""强剪弱弯"的设计原则;而履带式阻尼器可有效降低框架-摇摆墙结构的层位移及层间位移角,基于履带式阻尼器的框架-摇摆墙结构在承受地震荷载时层位移小,层间位移变化均匀,抗震性能更加优越.

This paper investigates the research on seismic performance of rocking wall-frame structure with crawler damper.The rocking wall-frame structure changes the mechanism of structural deformation which enhances the seismic ability of structure,but enlarges the interstory drifts,as it decreases the stiffness of structure.Crawler damper,simple configurations,less expensive price and easy installation could effectively control the structural deformation and distribution,and enhance the capacity of energy dissipation.The paper describes the analytical and numerical investigation of rocking wall-frame structure with crawler damper subjected to both static nonlinear analysis（Pushover）and dynamic nonlinear time history analysis.Different structures including frame-shear wall structure,rocking wallframe structure and rocking wall-frame structure with crawler damper have been analyzed numerically in comparison with their energy dissipation characteristics and seismic performance.The results indicate that rocking wall structure has a better seismic performance suppressing the bottom story failure mechanism,and meets well the ＂strong column-weak beam＂and＂strong shear-weak bending＂conception in Chinese seismic design code.Besides,the use of crawler damper provides an effective method of adding strength and energy dissipation to the structure.