The Research Of Super Long, Super Thick Steel Plate Shear Wall Welding Deformation Control

Steel plate shear wall has high lateral stiffness, bearing capacity, good toughness, high ability of energy consumption and high security reserves. Welding is the main connection mode with a large amount of heat input which result in welding deformation and residual stress. For the simulation of large component welding which has the problem of low efficiency and low accuracy. Aiming at this problem, by combining the Visual- mesh, SYSWELD and Pam-Assembly to do the research of super long, super thick steel plate shear wall. The research as follows:Study on welding deformation numerical simulation analysis of research status at home and abroad, analysis the causes of welding deformation to study the basic theory, including thermal elastic-plastic theory, the welding temperature field theory, the inherent strain theory and unit to soften law theory.In view of the super thick plate is commonly used in high-rise multi-layer multipass welding structure. First using Visual mesh to set up five different partial models, through thermal cycle curve method to analysis multilayer welding temperature field and welding deformation results. This can be concluded that K type groove effectively reduce the welding deformation compared with V type groove."Local- whole" method is applied to simulate the whole section steel plate shear wall, by changing the welding sequence and the clamping conditions to simulate the whole model of welding ASSEMBLY. Combined with the actual construction survey data analysis show that give priority to finish vertical welds and then finish transverse weld, and adding constraints on top of the steel plate shear wall, it can get the minimum value of the welding deformation.