网壳结构钢与混凝土组合节点力学性能试验

发布时间：2018-10-11 07:47

【摘要】：为研究钢与混凝土组合的网壳节点在轴压和压弯荷载作用下的力学性能,对10个不同参数的钢与混凝土组合的节点进行试验研究.试验构件主要变化参数包括:内圆钢管的壁厚和半径、外圆钢管的壁厚及矩形钢管与外圆钢管的不同连接方式.试验研究表明:在轴压和压弯荷载作用下节点表现出了与钢管混凝土相似的特点,具有较高的承载力和良好的塑性变形能力;内圆钢管的壁厚和半径对节点承载力影响较大,外圆钢管的壁厚对节点承载力影响较小;连接方式对节点承载力影响较大,圆钢管高于矩形钢管的节点承载力比圆钢管与矩形钢管齐平的承载力至少提高15%;轴压荷载作用下节点的破坏方式可以分为中心压缩和梭形偏转破坏;压弯荷载作用下节点的破坏方式分为节点和钢管屈服破坏.
[Abstract]:In order to study the mechanical properties of reticulated shell joints combined with steel and concrete under axial compression and flexural load, 10 steel and concrete joints with different parameters were tested. The main parameters of the test components include the wall thickness and radius of the inner circular steel tube, the wall thickness of the outer circular steel pipe and the different connection modes between the rectangular steel tube and the outer circular steel pipe. The experimental results show that the joints show similar characteristics to concrete filled steel tube under axial compression and bending load, and have high bearing capacity and good plastic deformation capacity, and the wall thickness and radius of inner circular steel tube have great influence on the bearing capacity of joints. The wall thickness of the outer circular steel tube has little effect on the bearing capacity of the joints, while the connection mode has a great effect on the bearing capacity of the joints. The joint bearing capacity of circular steel pipe higher than that of rectangular steel pipe is at least 15 times higher than that of circular steel tube and rectangular steel tube, and the failure mode of joint under axial compression load can be divided into central compression and spindle deflection failure. The failure modes of joints under compression and bending loads can be divided into joint and steel pipe yield failure.
【作者单位】：中北大学土木工程学科管理部;
【基金】：国家自然科学基金青年科学基金(51208473)
【分类号】：TU398.9

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