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尽管不锈钢与碳素钢的机械性能有显著的不同,但是现有规范关于不锈钢连接节点的设计规定都基于碳素钢的设计准则。对于不锈钢螺栓连接节点的设计抗力,EN1993-1-4和SCI/EuroInox(美国《科学引文索引》/欧洲不锈钢协会)的不锈钢设计手册基于EN1993-1-8和EN1993-1-3作了一些小修改。研究了厚板和薄板的不锈钢螺栓连接节点的承载性能。提出了一个奥氏体不锈钢和铁素体不锈钢试件的数值分析模型,并证明其正确性。将该模型用于螺栓节点承载力的参数分析,可研究主要变量对其影响。这些参数包括螺栓边距e2,端距e1和板厚t。结果表明,不锈钢螺栓节点的变形性能与碳钢节点存在某种程度的不同。数值模型中最初出现裂纹的部位与试验中观察到的不锈钢节点和碳素钢节点相符,这种相符性被作为定义一种强度失效准则的基础。以参数分析结果为基础的不锈钢螺栓连接节点承载能力极限状态和正常使用极限状态设计法则比现行的EC3法则更加经济和简捷。
Although the mechanical properties of stainless steels and carbon steels are significantly different, the existing specifications for the design of stainless steel joints are based on the design guidelines for carbon steels. For design resistance of stainless steel bolted joints, the stainless steel design manuals EN1993-1-4 and SCI / EuroInox (American Science Citation Index / European Stainless Steel Association) made some small based on EN1993-1-8 and EN1993-1-3 modify. The bearing capacity of stainless steel bolted joints between thick slab and thin slab was studied. A numerical analysis model of austenitic stainless steel and ferritic stainless steel was proposed and proved its correctness. The model is used to analyze the bearing capacity of bolt joints, and the influence of main variables can be studied. These parameters include bolt edge distance e2, end distance e1 and board thickness t. The results show that the deformation behavior of stainless steel bolt joints is somewhat different from that of carbon steel joints. The first cracks in the numerical model coincide with the joints of stainless steel and carbon steel observed in the experiment, and this coincidence is used as a basis for defining an intensity failure criterion. Based on the results of parametric analysis, the design rules of ultimate load capacity and limit state of stainless steel bolted joints are more economical and simpler than the current EC3 law.