钢结构模块新型自锁-可解锁式连接节点的抗拉研究

Research on tensile performance of new self⁃locking⁃unlockable joints of steel structure modules

为提高建筑用钢结构模块的施工效率、实现模块单元的快捷装配与拆卸,提出一种新型自锁-可解锁式连接节点方法,用Abaqus数值模拟软件建立了节点的精细化与半精细化有限元模型,探究了摩擦因数对节点抗拉承载性能的影响。选取上限位板厚度、下限位板厚度和上部滑块宽度为关键参数进行有限元模拟,研究各参数对节点抗拉承载力及破坏模式的影响。最后与实际节点抗拉承载力进行对比。结果表明:当摩擦因数为0.3时,新型节点承受最大拉力为1345.49 kN,较角件旋转式连接节点提升约为152%。节点抗拉承载力受上部滑块宽度影响较大,受上限位板厚度与下限位板厚度影响相对小。当上、下限位板厚度均为25mm时,在10~12mm内增加上部滑块宽度可提升节点承载拉力。

In order to improve the construction efficiency of building steel structure modules and realize quick assembly and disassembly of module units,a new method of self-locking-unlockable joint was proposed.The fine and semi-fine finite element models of the joints were established by Abaqus numerical simulation software,and the influence of friction factor on the tensile load performance of the joints was investigated.The upper limit plate thickness,lower limit plate thickness and upper slide block width were selected as the key parameters for finite element simulation,and the influence of each parameter on the tensile capacity and failure mode of the joint was studied.Finally,it was compared with the actual joint tensile capacity.The results show that when the friction factor is 0.3,the maximum tensile force of the new joint is 1345.49 kN,which is about 152%higher than that of the rotary inter-module connection joint.The tensile load of the joint is greatly affected by the width of the upper slide block,and relatively little affected by the thickness of the upper and lower limit plate.When the thickness of the upper and lower limit plate is 25 mm,increasing the width of the upper slide block within the range of 10-12 mm can increase the bearing tension of the joint.