摘要
以某高地震烈度区住宅工程为背景,结构形式为剪力墙结构,并在X、Y两个主轴方向设置连梁阻尼器进行消能减震结构设计,由于连梁阻尼器的非线性属性,对消能减震结构进行动力时程反应分析,重点介绍了连梁阻尼器等效刚度及减震结构附加阻尼比的计算步骤及取值方法建议。为了后续施工图设计阶段的便捷,提出采用等效模型振型分解反应谱法的计算分析。结果表明,通过能量消耗原理计算的连梁阻尼器等效刚度及减震结构附加阻尼比的取值方法合理可行,等效模型和真实非线性模型相似度高且偏于安全。利用振型分解反应谱法计算分析的等效结构各种计算指标和结果均满足规范要求,说明采用等效结构进行结构配筋设计是安全可靠的。最后,对消能减震结构进行了大震弹塑性分析,通过滞回曲线看到连梁阻尼器在提供抗侧刚度的同时耗能明显,有效保护了主体结构构件的损伤,且大震弹塑性位移角满足规范相应要求。
Taking a residential project in a high seismic intensity area as the background,the structural form is a shear wall structure,and coupling beam dampers are set in the X and Y axes for energy dissipation and vibration reduction design.Due to the nonlinear properties of coupling beam dampers,the dynamic time history response analysis of the energy dissipation and vibration reduction structure was first carried out,and the calculation steps and value selection methods of the equivalent stiffness of coupling beam dampers and the additional damping ratio of the vibration reduction structure were mainly introduced.For the convenience of subsequent construction drawing design stage,the mode-superposition response spectrum method of equivalent structure was proposed for seismic calculation and analysis.The results show that the method of calculating the equivalent stiffness of the coupling beam damper and the additional damping ratio of the damping structure calculated by the energy consumption principle is reasonable and feasible,and the similarity between the equivalent model and the real nonlinear model is high and tends to be safe.All the calculation items and results of equivalent structure calculated and analyzed by the mode-superposition response spectrum method meet the requirements of the codes,which shows that it is safe and reliable to use the equivalent structure for structural reinforcement design.Finally,the elastic-plastic analysis of the energy dissipation structure was carried out.Through the hysteretic curve,it can be seen that the coupling beam damper can provide the lateral stiffness and obviously consume energy,effectively protect the main structural members from seismic damage,and the elastic-plastic displacement angle under the rare earthquake meets the corresponding requirements of the codes.
作者
王江龙
高扬
赵冬
王丽梅
张晨
Wang Jiang-long;Gao Yang;Zhao Dong;Wang Li-mei;Zhang Chen(Gansu Institute of Architectural Design and Research Co.Ltd,Lanzhou 730030,China;Department of Engineering Mechanics,Xi’an University of Architecture and Technology,Xi’an 710055,China)
出处
《工程抗震与加固改造》
北大核心
2024年第3期26-33,63,共9页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金青年科学基金项目(52008332)
地震联合基金项目(U1939209)
甘肃省建筑设计研究院有限公司科技研发项目(KY2022-JG02)。
关键词
连梁阻尼器
消能减震结构
等效刚度
附加阻尼比
等效结构
时程分析
coupling beam damper
energy dissipation and shock absorption structure
equivalent stiffness
additional damping ratio
equivalent structure
time history analysis
