Seismic Response Analysis Of Joint Between Braced Steel Frame And External Composite Wall

The connection between the exterior wall and steel frame has a great effect on the overall seismic performance of the house.After the earthquake,a good connection will help to ensure the safety of life and property,which is beneficial to the disaster relief and rescue work.Based on the traditional node,this paper presents a new type joint.Firstly,a new anti-seismic connection node of wall and steel structure is proposed.The detail design is presented in chapter two.After towards,finite element simulation of connection node is carried out to discuss the influence of parameters such as section size,bending angle of joints and position of ribs on the performance of nodes,in which the bending angle is found to be the most significant effect on the performance of the joints.It is found that the thickness of 6mm is most beneficial.The influence of thickness of joint on stiffness is significant.However,the contribution to stiffness is not noticeable with the increasing of plate thickness.Secondly,a full scale shaking table test is conducted on the new anti-seismic connection node based on theoretical analysis.The failure modes and the overall working performance of the connected nodes under different seismic responses are studied.Four obvious failure modes,slippage,rotation,bending and peeling were observed with slight damage of structure.There is no visible cracks on the wall,which is well protected since the interlayer displacement is offset through the slip and rotation of the node.Finally,ABAQUS analysis is re-carried out.It is found that the stress-time curve of the joint is in good agreement comparing simulation result with theoretical results and experimental results.