矩形钢管混凝土上翼缘梁静力性能参数分析

Parameter analysis on static behavior of rectangular concrete-filled steel tube top flange beams

利用有限元软件ABAQUS对集中荷载作用下矩形钢管混凝土上翼缘梁(RCFSTB)的静力性能进行分析,并对主要几何参数和材料参数变化对静力性能的影响进行了研究.研究结果表明:增加腹板厚度和上翼缘高度、提高钢材强度可以显著增强承载力和减小变形;砼强度对于梁稳定承载力和破坏变形没有明显的影响;梁跨度增大时,梁的稳定性降低.

RCFSTB is the beam whose rectangular top flange adopts concrete filled steel tube.The static behavior of RCFSTB subjected to concentrated load was calculated by the finite element software ABAQUS.The effect of main geometry and material parameters on static behavior was analyzed.Results show that increasing of the web thickness,top flange height and steel strength all can significantly enhance capacity and reduce the deformation.While concrete strength has no apparent impact on stability capacity and deformation of beam.Stability of the beam decreases with the increase of beam span.