新型钢结构装配式节点有限元分析

Finite element analysis of fabricated joints for new steel structure

在既有的钢结构梁柱外伸端板连接节点的基础上,提出一种新型钢结构装配式节点,利用ANSYS有限元软件进行单调递增荷载和循环往复荷载作用下的数值分析.通过将新型节点在单调递增荷载作用下的节点抗弯刚度与EC3规范下的节点刚度量化规定进行对比,得出结论:新型节点是一种刚性节点.通过将新型节点与既有的梁柱外伸端板连接节点在单调递增荷载下的破坏模式、屈服位移、极限位移进行对比;在往复荷载作用下的滞回曲线、粘滞阻尼系数进行对比,得出结论:新型节点具有更好的节点强度、延性和耗能性能,新型节点破坏处外移至节点核心区以外,满足“强节点弱构件”的抗震要求,端板厚度增加,可提高节点承载能力.

Based on the existing steel structure beam-column extension slab joints,a new fabricated joints of steel structure is proposed,and the numerical analysis under monotone increasing load and cyclic load is carried out by ANSYS finite element analysis.By comparing the bending resistance of the new joints under monotone increasing load with the quantification of joints stiffness under EC3 code,it is concluded that the new joints is a rigid joints.The failure modes,yield displacements and limit displacements of the new joint and the existing extension slab joints at the beam and column out ends are compared under monotone increasing load,by comparing the hysteretic curve and viscous damping coefficient under the reciprocating load,it is concluded that the new joints has better strength and ductility and energy performance,the failure of the new joints is moved outside the core area of the joints,the seismic performance of"strong joints and weak component"is satisfied,and the bearing capacity of the node can be improved by increasing the thickness of the end plate.