五边形空翼缘梁的承载力研究

Bearing Capacity of Pentagon Hollow Flange Beam

对五边形空翼缘梁(简称PHFB)在承受跨中集中荷载作用下的破坏过程进行了试验测试和数值模拟,发现该形式的梁在承受集中荷载作用下容易在力作用点处发生局部屈曲,说明在集中力荷载作用下五边形空翼缘梁受局部屈曲作用控制,而传统的工字梁则容易发生整体失稳.在试验测试的基础上,通过有限元模型分析研究了空翼缘梁的几何参数对承载力的影响规律,为空翼缘梁的设计提供参考意见.

Experimental test and finite element analysis are both carried out to analyze the failure process of Pentagon Hollow Flange Beam（PHFB） under concentrated load at the mid-span.It is found that local buckling easily occurs at the loading point for the PHFB,whearas global buckling is the main failure mode for conentional I-shape beam.Based on the experimental result,the effect of some geometrical parameters on the bearing capacity of the PHFB is investigated,and some advice for engineering design is also presented.