摘要
参照钢结构设计规范(GB50017-2003)和抗震设计规范(GB50011-2010)设计了一幢10层钢结构框架,并对结构进行简化。采用Perform-3d非线性分析软件进行建模,基于等能量和等效阻尼比原则,在原基本结构中加入合适尺寸的屈曲约束支撑(BRB)组合成屈曲约束支撑钢框架。对原结构和BRB结构进行了非线性推覆分析和动力时程分析,在此基础上分析结构的地震响应,对比原结构与BRB结构的屈服机制。研究结果表明,结构设计时加入屈曲约束支撑可以有效减少结构层间位移响应,大幅减少框架结构所承担的楼层剪力和框架结构构件的塑性耗能比例,充分发挥了屈曲约束支撑作为建筑结构消能构件的耗能作用,大幅提高了结构整体的抗震性能。
A 10 story steel structure frame is designed according to Code for Design of Steel Structures（ GB50017-2003） and Code for Seismic Design of Buildings（ GB50011-2010）. Based on equivalent energy rule and equivalent damping ratio principle,buckling restrained braces（ BRB） with appropriate size are added on the original steel frame model to simulate buckling restrained braced steel frame. Static elastic-plastic analysis and dynamic time-history analysis are carried out for the original steel structure model and the buckling restrained braced steel frame established by Perform-3D nonlinear analysis software to compare the yield mechanism and dynamic response of the two structures. The results show that buckling restrained braces play considerable role as energy dissipation components and can effectively decrease structure displacement response and story shear,substantially lead to the reduce of plastic energy dissipation ratio which is absorbed by the frame part. The use of BRB elements can greatly improve the seismic performance of the overall structure.
出处
《工程抗震与加固改造》
北大核心
2016年第2期86-93,共8页
Earthquake Resistant Engineering and Retrofitting
