海口机场综合交通中心钢框架-屈曲约束支撑结构抗震性能分析

Seismic performance analysis on steel frame-buckling restrained brace structure of Haikou Airport Comprehensive Transportation Center

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 steel frame-buckling restrained brace structural system was adopted to enhance the seismic performance of the overall structure; under small earthquakes,through the comparative analysis of the elastic analysis on steel frame and buckling restrained brace structure,it indicates that buckling restrained brace can effectively improve the translational and torsional stiffness of the structure; SAUSAGE was used to conduct the dynamic elastic-plastic analysis on the buckling restrained brace under the rare earthquake to study the plastic development process,hysteretic curve,largest interlayer displacement angle and energy dissipation distribution conditions of the structure,which indicate that energy dissipation of buckling restrained brace covers a large proportion to effectively protect the main structure; ABAQUS was used to conduct finite element analysis of typical support and connection nodes to guarantee the nodes remain elastic in the earthquake,which indicate that the overall structure and node meet the requirements of deformation and bearing capacity under the rare earthquake.