【作者】 高鹏； 杨锦程； 胡大柱； 刘文武； 宋勇；

【Author】 GAO Peng;YANG Jincheng;HU Dazhu;LIU Wenwu;SONG Yong;School of Civil Engineering, Hefei University of Technology;School of Urban Construction and Safety Engineering, Shanghai Institute of Technology;Hefei Branch Institute,Shenzhen General Institute of Architectural Design and Research Co., Ltd.;

【机构】 合肥工业大学土木与水利工程学院； 上海应用技术大学城市建设与安全工程学院； 深圳市建筑设计研究总院有限公司合肥分院；

【摘要】 随着设防类别标准的提高,既有钢筋混凝土框架结构在改造时普遍存在因抗震等级提高而相对于设计水准的性能不足情况。以某既有公共建筑改造为医院为例,结构在拆分和改造后存在扭转效应和大量梁柱构件配筋面积不足的问题,通过增设屈曲约束支撑和黏滞阻尼墙的方法进行混合减震设计。使用SAUSG软件建立含普通屈曲约束支撑、双阶屈服屈曲约束支撑和黏滞阻尼墙的钢筋混凝土框架结构的混合减震模型,并对结构进行非线性时程分析,比较不同方案结构在地震作用中的位移响应和耗能能力等。分析结果表明:采用混合减震提高了结构的抗震承载能力,抗震构造措施可适当降低。串联双阶屈服屈曲约束支撑的混合减震体系在小震和中震下控制结构基底剪力和峰值加速度的效果更好。并联双阶屈服屈曲约束支撑的混合减震体系控制结构位移响应效果最好,且在大震下能提供更多的附加阻尼比;结构的抗震韧性等级达到二星级,在震后能够快速修复并投入使用。更多还原

【Abstract】 With the improvement of fortification category standards, the performance of existing reinforced concrete frame structures is generally insufficient compared with the design level due to the improvement of seismic grade. Taking the transformation of an existing public building into a hospital as an example, the structure had the problem of torsion effect and insufficient reinforcement of a large number of beam and column members after splitting. The hybrid damping design was carried out by adding buckling restrained brace and viscous fluiddamping wall. The hybrid damping models of reinforced concrete frame structure including ordinary buckling restrained brace, double-level yield buckling restrained brace and viscous fluid damping wall were established by using SAUSG software, and the nonlinear time history analysis of the structure were carried out to compare the displacement response and energy dissipation capacity of different schemes. The analysis results show that the hybrid damping improved the seismic bearing capacity of the structure, and the seismic structural measures are appropriately reduced.The hybrid damping system with double-levelyield buckling restrained brace in series has better control effect on the base shear force and peak acceleration of the structure under small and medium earthquakes. The hybrid damping system with parallel double-level yield buckling restrained brace has better effect on controlling the displacement response, and can provide more additional damping ratios under large earthquake; The seismic resilience level of the structure reach two stars, whichcan be quickly repaired and put into use after the earthquake.更多还原