环形加劲板方向受压钢管节点的承载力

Bearing capacity of steel tubular joints under compression in direction of annular ribbed plate

针对钢管节点环形加劲板受压的承载力问题,采用有限元分析和足尺试验进行研究.比较2种方法的计算结果,澄清中国的设计规定中承载力的物理含义,采用有限元方法系统研究多种参数下节点的承载力,并与规范公式结果进行比较.研究表明,通过有限元分析和足尺试验获得的荷载位移曲线比较接近;节点承载力随着主管厚度、环板宽度、环板厚度的增大而增大;不同参数下通过有限元计算获得的屈服承载力与规范公式结果的变化趋势基本一致.

Finite element simulations and full-scale tests were employed in order to analyze the bearing capacity of steel tubular joints under compression in the direction of annular ribbed plate. The results ob- tained from these two methods were compared. The physical meaning of the bearing strength of the joints regulated in the Chinese design code was clarified. The bearing strengths of the joints under different size parameters were calculated using finite element simulation, and the simulation results were compared with those calculated using the equations regulated by the Code. Results show that the load-displacement hehav iors of the joint obtained using finite element simulations and full-scale tests are quite close. The bearing strengths of the joints increase with the thickness of the chord or the width of the annular ribbed plate or the thickness of the plate. The variation trends of bearing strengths of the joints with respect to the geo metrical parameters of the joints obtained using finite element simulations are quite similar as those calcu lated with the equations regulated by the Code.