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对10个X形圆管斜插板节点试件在插板轴压力作用下的承载性能进行单调加载试验研究。以插板厚度和插板平面与圆管轴线平面之间夹角为变化参数进行节点轴压性能试验,研究了X形圆管斜插板节点在插板轴压力作用下的破坏模式,分析了荷载-端板位移曲线,节点区域应变强度分布,以及插板相对厚度(插板与圆管厚度比值)、插板平面与管轴线之间夹角对节点轴向承载力和延性的影响。试验结果表明:当插板相对厚度较小时(取值为0.89),夹角基本不影响圆管斜插板节点的承载力;插板相对厚度较大时(取值为1.33),随着夹角增大圆管斜插板节点的轴压承载力呈逐渐增大的趋势;随着插板相对厚度的增大,轴压承载力增大;薄插板(插板厚度为4 mm)节点试件的大多数测点保持弹性;而厚插板(插板厚度为6 mm)节点试件的大多数测点进入塑性状态;插板相对比较薄的情况下,IIW规范的计算值偏于不安全;插板相对较厚时,IIW规范计算结果偏于安全。
The monotonous loading tests of ten X-shaped tube-splicing plate joints under monolithic loading were carried out. The joint axial compression test was carried out with the thickness of the insert and the angle between the plane of the insert plate and the plane of the circular tube axis. The failure mode of the X-shaped plate was analyzed under axial pressure of the insert plate. Load-end plate displacement curve, the distribution of strain intensity in the node area, and the relative thickness of the insert plate (the ratio of the insert plate to the pipe thickness), the influence of the included angle between the plane of the insert plate and the pipe axis on the axial bearing capacity and ductility of the joint. The test results show that: when the relative thickness of the insert plate is small (the value is 0.89), the included angle basically does not affect the bearing capacity of the node of the plate; When the relative thickness of the insert plate is larger (the value is 1.33) The axial load bearing capacity of the angle-slanting plate increases gradually with the increase of the angle. The bearing capacity increases with the increase of the relative thickness of the plate. The test of the thin plate (the thickness of the plate is 4 mm) Most of the measuring points remain elastic; while most of the measuring points of the thick flapper (the thickness of the flapper is 6 mm) enter the plastic state; in the relatively thin flapper, the calculated value of the IIW criterion is not Safety; When the board is relatively thick, the calculation result of IIW standard is biased to safety.