大连市体育馆圆钢管相贯节点足尺实验研究

大连体育馆主体屋盖钢结构中的关键相贯节点的性能对结构的工作性能影响至关重要,因此分别进行了两组节点实验,每组实验均采用两根试件,区别仅在于节点是否采取内置加强板这一节点加强措施。实验结果表明:未采取加强措施的节点在设计荷载作用下由于产生过大的塑性变形而破坏,而采取节点加强措施后,明显的改变了节点的工作性能,显著的提高了节点的极限承载力,采用有限元软件ANSYS对该节点进行的数值模拟结果也验证了实验结果的正确性。在此基础上,建议该工程施工时,在这些受力比较关键的节点处采取内置加强板的构造形式。

FULL-SCALE TEST ON CHS JOINTS OF DALIAN GYMNASIUM

The performance of some key joints with circular hollow sections(CHS) in the steel structure of Dalian gymnasium has an important influence on the performance of the whole structure.Therefore,two series of full-scale tests were conducted and whether the joint strengthened or not was the only different in each series.Results show that the CHS joints without strengthening are destructive due to the large plastic deformation under design loads.However,the performance of the CHS joints strengthened by an inside gusset plate is obviously improved and its performance is largely increased.Then,the comparison between the numerical values using ANSYS and the tested values was conducted.It is shown that both of the values are in good agreement with each other.Based on the mentioned above,some key CHS joint strengthening methods are suggested during a construction procedure.