环口板加固T型方钢管节点在轴压作用下极限承载力研究  

RESEARCH ON THE STATIC STRENGTH OF SQUARE TUBULAR T-JOINTS REINFORCED WITH COLLAR PLATE UNDER AXIAL COMPRESSION

作　　者：王文杰[1] 邵永波[1] 夏辉[1] 

机构地区：[1]烟台大学土木工程学院,烟台264005

出　　处：《工程力学》2012年第6期138-145,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(50808153)

摘　　要：从理论分析、试验测试及有限元模拟三个方面对环口板加固T型方钢管节点的极限承载力进行了初步的研究工作。首先基于塑性铰线模型推导出了环口板加固T型方钢管节的极限承载力计算公式。然后对2个环口板加固T型方钢管节点试件及2个对应的未加固节点试件进行了在轴压作用下的承载力试验测试,结果表明环口板可以明显提高管节点的极限承载力。通过有限元法对试验试件进行了数值模拟,其结果与试验结果吻合较好,因而使用有限元法对9个不同节点尺寸的加固模型及对应的9个未加固节点模型进行了模拟,结果发现加固后节点的承载力均大于未加固节点的承载力。环口板加固T型方钢管节点的极限承载力计算公式在环口板有足够刚度,节点破坏模式为由局部屈曲导致形成塑性铰线破坏时可以获得较为精确的结果。The fundamental research work on the square tubular T-joints reinforced with collar plate is carried out incluing theoretical analysis, experimental tests and finite element simulation. Firstly, the equation for predicting the static strength of a collar plate reinforced square tubular T-joint under axial compression loading is deduced based on the yield line model. Thereafter, two collar plate reinforced square tubular T-joints and two corresponding unreinforced T-joints are analyzed through experimental tests and finite element simulation, it is found that the collar plate can improve the bearing capacity of the T-joints significantly. Additionally, a total of 18 square tubular T-joints are analyzed by using the finite element method. The results show that the static strength of collar plate reinforced T-joints, compared with the corresponding unreinforced T-joints, has a significant improvement, and the equation for predicting the static strength of a collar plate reinforced square tubular T-joint is reasonably accurate when the collar plate has enough stiffness and the failure mode is mainly local buckling.

关 键 词：环口板 T型方钢管节点 轴压作用 极限承载力 塑性铰线 

分 类 号：TU398[建筑科学—结构工程]