Research on Seismic Performance of Connections in Integrated Assembled Box Buildings
In order to solve the limitation of high requirement of on site construction operation space,a new type of corner connections of integrated prefabricated box building is studied.The finite element software ABAQUS was used to establish a refined joint model.On the basis of verifying the effectiveness of the numerical simulation method,the bearing capacity,stiffness,deformation capacity,hysteresis curves and energy dissipation capacity of the connect were studied,and the effects of different axial compression ratios,connection angle thickness and edge thickness ratio on the failure mode and seismic performance of the joint were analyzed.The results show that the failure mode of the node is close to the node domain ceiling beams and floor beams form plastic hinges at the end of the beams,the flange of the end of the beams bulging damage,modular columns and connecting corners are part of the region of the plastic deformation,but did not occur,has good seismic performance,in line with the"strong columns and weak beams,strong nodes and weak components"design principle.The seismic performance of the node is greatly affected by the axial compression ratio,and the bearing capacity and seismic performance of the node can be effectively improved by changing the thickness of the connecting corners and adding rolled edges.It is suggested that the axial pressure ratio should be controlled within 0.3;the thickness of the connecting corner piece should not be lower than 12mm;the addition of rolled edge can improve the stability of the connecting corner piece flange plate,preventing the corner piece flange from buckling deformation.
万方数据
维普
