Performance of Circular CFST Column to Steel Beam Frames under Lateral Cyclic Loading
首发时间:2010-12-16
Abstract:This paper presents the study on the behavior of composite frames with circular concrete filled steel tubular (CFST) columns to steel beam. Six composite frames were tested under a constant axial load on the CFST columns and a lateral cyclic load on the frame. Each frame specimen consisted of two CFST columns and a steel beam to represent an interior frame in a building. A finite element analysis (FEA) model was developed to investigate the behavior of the composite frame. The results obtained from the FEA model were verified against those experimental results. Detailed analysis was carried out on longitudinal stress in steel beams, axial stress distribution in concrete, concrete stress along the column height and at the connection panel. Parametric studies were conducted to investigate the influence of axial load level, beam-to-column linear stiffness ratio on the structural behavior of composite frames. A simplified hysteretic lateral load versus lateral displacement model was proposed for such composite frames.
keywords: Structural Engineering Concrete-Filled Steel Tube (CFST) Frame Seismic Behavior Ductility Finite Element Analysis (FEA) Model Mechanical Behavior
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圆钢管混凝土柱-钢梁框架在水平往复荷载下的性能
摘要:本文介绍了圆钢管混凝土柱-钢梁组合框架的力学性能。6个组合框架进行了在柱端恒定轴力和梁端往复荷载作用下的试验研究,每个框架试件为从框架结构中选取的单元,包括两个钢管混凝土柱和一个钢梁。建立了该组合框架的有限元分析模型,有限元分析结果和试验结果吻合良好,校验了模型的正确性。基于此模型,细致分析了钢梁纵向应力分布、柱核心轴向及沿柱高度的应力分布和节点域的应力分布。分析了柱轴压比及梁柱线刚度比对此类框架的力学性能影响,最终提供了此类组合框架的荷载-位移滞回模型。
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