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采用钢框架-屈曲约束支撑结构体系以增强整体结构的抗震性能;在小震作用下,通过对钢框架和屈曲约束支撑结构进行弹性对比分析,表明屈曲约束支撑能更有效提高结构的平动、抗扭刚度;采用SAUSAGE对设屈曲约束支撑结构进行大震下的动力弹塑性分析,研究结构在大震下塑性发展过程、滞回曲线、最大层间位移角及能量消耗分布情况,表明屈曲约束支撑耗能占比较大,能有效保护主体结构;用ABAQUS对典型支撑连接节点进行有限元分析,保证节点在大震下保持弹性,表明整体结构和节点满足大震下的变形和承载力要求。
The structure of steel frame-buckling restraint system is adopted to enhance the seismic performance of the whole structure. The elastic contrast analysis of steel frame and buckling restrained structure under the action of small earthquake shows that buckling restrained brace can effectively improve the translation of the structure, The dynamic elasto-plastic analysis of the buckling-restrained support structure under large earthquake is carried out by SAUSAGE. The plasticity development process, hysteresis curve, maximum inter-floor displacement angle and energy consumption distribution under high earthquake are studied. It is shown that the buckling restraint Which can effectively protect the main structure. Using ABAQUS, the finite element analysis of the typical support joints is carried out to ensure that the joints remain elastic under large earthquakes, indicating that the whole structure and joints meet the requirements of deformation and bearing capacity under major earthquakes.