高性能铝合金耗能支撑抗震性能研究  

Study on seismic behaviour of high-performance aluminium alloy energy dissipation braces

作　　者：贾斌[1] 罗晓群[1] 张其林[1] 丁娟[1,2] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]精工建筑设计研究总院,上海200233

出　　处：《世界地震工程》2014年第1期1-11,共11页World Earthquake Engineering

基　　金：上海市科技人才计划项目(11XD1404900)

摘　　要：对国外已进行的相关铝合金材料及其BRB构件试验进行了分类总结,从强度、延性、应变硬化以及疲劳等结构分析的要点进行了比较研究。经过热处理的铝合金材料其屈服强度较高但延性降低,不同牌号铝合金在循环加载下的应变硬化现象差别较大,但最大应变硬化率不超过1%。采用焊接加劲端板的铝合金BRB的低周疲劳性能比螺栓连接加劲端板的试件差,核芯板中部是否点焊限位塞对铝合金BRB(ALBRB)的低周疲劳性能影响很大。在试验研究的基础上推导了装配式铝合金BRB的整体稳定和局部稳定条件,并对相关设计参数进行了有限元分析验证。Classification and summarization were conducted for the aluminum alloy material tests and the corre- sponding buckling restrained brace （BRB） tests performed abroad. The current paper deals with the mechanical features of aluminum alloy , with particular regards to those parameters which are important for structural analysis. By the comparison of the stress-strain curves between the heat treated and non-heat treated aluminum alloy, it is ob- served that the yield strength of the former is greater than that of the latter, but the ductility is in lower level. The strain hardening vary greatly among different brands of material, but the maximum strain hardening is no more than 1%. It is clear that the low-cycle fatigue strength of the bolt-assembled aluminium alloy buckling restrained brace （ALBRB） was much better than that of the welded one, and the bolt-assembled BRB without spot-welded stoppers possess better low-cycle fatigue performances in contrast with that having spot-welded stoppers. Overall stability and local stability conditions were derived based on relevant experiments, and using finite element method to verify the rationality of the desizn parameters.

关 键 词：铝合金 屈曲约束支撑 螺栓装配 抗震设计 有限元分析 

分 类 号：TU512.4[建筑科学—建筑技术科学] TU311.2