Design Method Of Outer Wall Plate And Joint Of Steel Structure Building

The non-structural component is an important part of the building.The destruction of the nonstructural component leads to the loss of the building function in the earthquake,fire and other disasters.The proportion of the external wall,the internal wall and the wall decoration in the total cost of the building is higher and higher.The use of the flexible connection node in the assembly building can make the external wall panel and the node coordinate deformation to achieve the protection The function of wallboard.The "down support up pull" connection node belongs to the semi-rigid connection node.The advantages of the semi-rigid connection node are energy efficiency reducing the stress concentration of the external wall panel;strengthening after a disaster is easy to achieve;absorbing and dissipating energy to reduce the displacement response of the external wall panel when the structure is subjected to the earthquake.The working principle of "lower bracket and upper pull" is that in the wall panel,the joint provides rigidity for the structure under small earthquake,the joint does not slide or rotate,the seismic force increases,the screw connecting the wall panel slides along the oblong hole of the upper joint,in this process,it plays the role of friction energy consumption,the seismic force increases again,the joint is in the state of tensile deformation;outside the wall panel,the joint and the external wall panel change together Shape,like the "Z"spring,reduces the displacement response of the wall panel,thus protecting the wall panel from damage.In order to quantitatively describe the protection effect of the joint on the wall panel,the structural deformation process is simulated according to the sequence of single joint,joint system,and external wall panel joint system.The stiffness of the joint along each direction is different,and the influence of the joint thickness,the bending angle of the upper joint and the bolt preload on the stress deformation of the joint is analyzed respectively.The joint stress,displacement and u-rf diagram(displacement reaction)are used to describe the results,and the deformation performance of the joint is analyzed and observed.The existing shaking table tests have verified that the joint is safe and reliable under 9-degree earthquake.The rotational failure and bending failure of the joint are analyzed from displacement and strain,and the cooperative deformation ability of the four joints is studied.The prefabricated ribbed composite wallboard is selected.When the middle span displacement of the wallboard reaches 20 mm,the bottom of the wallboard is 1.7 mm and the top of the wallboard is 3.7 mm;the bottom of the wallboard is 4.28 mm and the top of the wallboard is 3.67 mm.Compared with the displacement deformation and stress of the joint,the performance of the joint is good,which can play the advantages of semi-rigid joint,and achieve the purpose of protecting the wall panel.