焊接过程对方钢管-C型钢焊接混凝土组合剪力墙受力性能影响研究

EFFECT OF WELDING PROCESSES ON MECHANICAL PERFORMANCES FOR COMPOSITE SHEAR WALLS REINFORCED WITH STEEL TUBES WELDED WITH SQUARE STEEL TUBES AND C TYPE STEEL

方钢管-C型钢焊接内填混凝土组合剪力墙是一种新型的双钢板混凝土组合剪力墙。为分析焊接残余应力对墙体抗震性能的影响,首先基于ABAQUS有限元软件,采用间接耦合法对该新型组合剪力墙进行三维数值模拟分析,得到了焊接温度场和残余应力场的分布规律及特点。结果表明:墙体横向和沿厚度方向的残余应力都很小,分析时可以忽略。在此基础上,对比了有纵向残余应力、无残余应力的剪力墙的抗震性能,如滞回曲线、最大承载力、弹性刚度等,发现由于应力重分布原因,焊接残余应力对方钢管-C型钢焊接填内混凝土组合剪力墙抗震性能影响很小。

A composite shear wall reinforced with steel tubes welded with square steel tubes and C type steel was a new type of composite double steel plate shear walls.In order to analyze the influence of welding residual stress on the seismic performances of the walls,a three-dimensional numerical simulation analysis on the new composite shear wall was conducted using the indirect coupling method based on ABAQUS,and the distribution rules and characteristics of welding thermal fields and residual stress fields were obtained.The results indicated the residual stress in the transverse and thickness directions of the walls were so small that it could be ignored during analysis.On the basis,the seismic performances of shear walls with and without longitudinal residual stress were compared,such as hysteresis curves,maximum bearing capacity,elastic stiffness,etc.It was found that due to the redistribution of stress,the welding residual stress had a little effect on the seismic performances of composite shear walls.