高效消能支撑在既有框架结构加固工程中的应用

高效消能支撑不但具有普通屈曲约束支撑耗能能力强的特点,还具备更小的屈服位移,可以更早地消耗能量、保护结构。本文将此支撑用于钢与混凝土组合结构加固改造工程,首先根据原结构的地震响应在结构薄弱位置布置支撑,然后对加固后结构进行多遇地震下的反应谱分析和罕遇地震下的时程分析。分析结果显示,加固后结构扭转周期得到改善,多遇地震及罕遇地震结构作用下层间位移角均满足规范限制,体现了高效消能支撑良好的减震效果。

Application of high efficiency energy dissipation brace in reinforcement of existing frame structures

High efficiency energy dissipation brace not only has the characteristics of high energy dissipation capacity of ordinary buckling-restrained braces,but also has smaller yield displacement,which can consume energy earlier and protect the structure.In this paper,the brace is used in the reinforcement and reconstruction of steel and concrete mixed structures.First,the brace is arranged in the weak locations of the structure according to the seismic response of the original structure.Then,the response spectrum analysis of the reinforced structure in frequent earthquakes and time history analysis of the reinforced structure in rare earthquakes are carried out.The analysis results show that the torsion period of the reinforced structure is improved,and the inter-story displacement angle of the structure under frequent earthquakes and rare earthquakes meets the code limit,which reflects the good damping effect of high efficiency energy dissipation brace.