X型矩形管斜插板节点轴压性能试验研究

发布时间：2018-04-14 10:24

本文选题：X型矩形管斜插板节点 + 轴压性能　；参考：《土木工程学报》2014年09期

【摘要】：对X型矩形管斜插板节点在插板轴压力作用下的极限承载性能进行单调加载的试验研究。实施10个不同插板的厚度和插板平面与矩形管轴线之间夹角的节点轴压性能试验。介绍节点试验方案,描述X型矩形管斜插板节点在插板轴压力作用下的破坏模式,给出荷载-端位移曲线以及节点区域应变强度分布曲线,并将插板相对厚度(插板与矩形管厚度比值)τ、插板平面与管轴线之间夹角θ对节点轴向极限承载力和延性的影响进行讨论。试验研究结果表明:随着夹角θ的增大,节点轴压极限承载力呈增大趋势;θ为0°时,τ值对节点轴压极限承载力的影响很小;其余夹角θ节点试件极限承载力随着插板厚度的增大而增大;节点应变强度最大均发生在插板与矩形管连接的焊缝端部区域。最大应变强度在此区域的分布不同,则节点的破坏模式不同;IIW规范计算公式中未考虑τ值的影响,而试验中τ值对节点极限承载力有很大的影响,所以规范还有待完善,需要进行深入的有限元参数分析。
[Abstract]:Experimental study on limit inclined plate inserted in node in the axial pressure tube under monotonic loading bearing capacity of X type rectangular. The implementation of 10 different plate thickness and the nodal axis plane and a rectangular tube inserted in the angle between the axis compression test. The test scheme of node failure mode description of inclined plate node the board shaft under the pressure of X type rectangular tube, given the load displacement curves and the node area strain strength distribution curve, and the inserting plate thickness (insert plate and rectangular tube thickness ratio) is, between the inserting plate plane and the angle between the axis of pipe joint axial ultimate bearing capacity and ductility of discussion. Test results show that: with the increase of the angle between the nodes, axial compression bearing capacity increases to 0 degrees; theta, tau values affect the ultimate bearing capacity of the node pressure axis is very small; the rest angle joints with ultimate bearing capacity With the increase of plate thickness increasing; strain strength maximum node occurred in the inserting plate and the rectangular pipe connection weld end region. The distribution of the maximum strain intensity in different regions, different failure modes of the node; IIW specification does not consider the impact of T value formula, and the test value of the node in t the ultimate bearing capacity has great influence, so the standard should be improved, the need for finite element parameters of in-depth analysis.

【作者单位】：长江大学;华侨大学;
【基金】：国家自然科学基金(51008133,51278209) 福建省自然科学基金(2012J01219,2012J05095)
【分类号】：TU392.3

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