装配式预应力短索自复位钢框架数值模拟

NUMERICAL SIMULATION OF PREFABRICATED SELF-CENTERING STEEL FRAME WITH PRESTRESSED SHORT STRANDS

在已经完成的预应力短索自复位钢框架节点试验和数值模拟的基础上,采用ABAQUS有限元分析软件将装配式预应力短索自复位钢框架和普通自复位钢框架、刚接钢框架进行静力往复加载和动力时程的数值模拟结果进行对比分析,结果表明:两种自复位钢框架较刚接框架而言可有效减少结构损伤,且残余力较小,具有良好的自动复位和恢复结构功能的能力;装配式预应力短索自复位钢框架可以避免高空张拉钢绞线,减小了张拉难度,保证了张拉质量,具有更广阔的应用前景。

Based on the self-centering steel frame with prestressed short strands,through the finite element analysis software ABAQUS,the prefabricated self-centering steel frame with short strands,the common self-centering steel frame and the rigid-jointed steel frame were simulated and compared.The results of quasi-static loading test and dynamic time history analysis showed that the two self-centering steel frames could effectively reduce structural damage compared with the rigid-jointed frames,and the residual force was small.They had good self-centering capacity to restore structural functions;the new type of prefabricated self-centering steel frame with prestressed short strands could avoid aerial tension,reduce the difficulty of construction,ensure the quality of tension and facilitate engineering application.