Seismic Analysis of Semi-rigid Frames using Skeleton Joints

This study proposes a new type of flange-widened bone-type semi-rigid frame node, and takes a 4-story frame as an example, uses the finite element software Abaqus to analyze its seismic performance under different seismic waves, and compares it with the traditional rigid connection frame. The results show that the stiffness of the new node frame is slightly lower than that of the tradition rigid node frame, which reduces the horizontal displacement of each layer under the action of earthquake, optimizes the deformation capacity, and enhances the force performance and ductility, the maximun value of the base shear force is lower than that of the traditional rigid frame, which can effectively disperse and dissipate the seismic energy andimprove the overall stabitity of the structure; the elastic-plastic interlayer displacement angle is less than 1/50 under rare earthquakes, which meets the requirements of the specification and can achieve the goal of “no collapse in a large earthquake”. In addition, the node can effectively improve the safety and reliability of the structure in actual engineering.