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我国北方寒区常发生桁架拱轻钢大棚在暴风、暴雪共同作用下破坏。以桁架拱轻钢大棚骨架的薄弱部位即K型节点[1-3]为研究对象,采用ANSYS有限元分析软件对灌浆K型节点及空心K型节点进行模拟静力分析,同时进行了灌浆K型节点及空心K型节点静力加载试验,验证了有限元分析结果的正确性。分析结果表明,灌浆K型节点与空心K型节点的最大应力均出现在受压支杆与主管焊接处,且灌浆K型节点应力明显小于空心K型节点应力,灌浆改善了桁架拱轻钢大棚骨架K型节点的受力性能,为灌浆桁架拱轻钢大棚骨架的整体分析提供了依据。
Frequently occurred in northern China cold truss arch steel shed in the storm, Blizzard damage. Taking the K-type node [1-3], which is the weak part of the truss arch steel shed structure, the ANSYS finite element analysis software was used to simulate the static analysis of the grouted K-type node and the hollow K type node, and the grouting K Type nodes and hollow K-type nodes static load test, verify the correctness of the finite element analysis results. The results show that the maximum stresses of K-joints and K-joints are found at the welding place between the compression strut and the main pipe. The stress of K-joints at grouting is obviously lower than that of hollow K-joints. The mechanical properties of the K-joints of the skeleton provide the basis for the overall analysis of the skeleton of light-weight steel sheds with grouted truss arch.