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采用有限元软件ABAQUS对节点域箱形弱轴连接普通节点和翼缘板式加强型节点进行有限元分析,研究了翼缘过渡板的长度、翼缘过渡板的厚度、轴压比、钢材强度对节点域箱形弱轴连接翼缘板加强型节点滞回性能的影响。分析结果表明:在循环荷载作用下,翼缘板厚度对节点的滞回性能影响较小,建议翼缘过渡板tf的厚度取值范围为1.2t≤tf≤1.6t(t为梁翼缘厚度);翼缘板长度对节点的滞回曲线影响较明显,建议翼缘加强板长度l_p的取值范围为0.6h_b≤l_p≤0.8h_b(h_b为梁的高度);轴压比不宜过大,建议取0.6以下,否则无法满足“强柱弱梁”的抗震设防要求;随着钢材强度的提高,节点的屈服承载能力和极限承载能力随之也提高,但其延性也在降低,Q390以上的中高强度钢材不满足延性大于3的要求,因此中高强度钢材的应用有待进一步的研究。
The finite element software ABAQUS was applied to the finite element analysis of box-shaped, weak-axis connection common node and flange-stiffened node in the node domain. The influences of the length of the flange transition plate, the thickness of the flange transition plate, the axial compression ratio and the strength of the steel Effect of Hysteretic Behavior of Reinforced Joints with Box Shaped Shaft Joint Flange in Joint Domain. The results show that under the cyclic loading, the thickness of the flange plate has little effect on the hysteretic behavior of the joint. It is suggested that the thickness of the flange plate tf should be 1.2t≤tf≤1.6t (t is the thickness of the beam flange). The length of the flange plate has a significant effect on the hysteresis curve of the joint. The recommended value of the flange plate l_p is 0.6h_b≤l_p≤0.8h_b (h_b is the height of the beam). The axial compression ratio should not be too large. 0.6 or less, or can not meet the “strong column weak beam ” seismic fortification requirements; with the increase of steel strength, node yield load capacity and ultimate bearing capacity also increased, but its ductility is also reduced, Q390 above High-strength steel does not meet the requirements of ductility greater than 3, so the application of high-strength steel needs further study.