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为了使盖板可以应用于工字形柱弱轴连接,提出了一种新型的节点域箱形加强式工字形柱弱轴连接形式.首先,对盖板节点在循环荷载作用下的受力性能进行有限元模拟和试验对比验证;然后,对新型弱轴盖板连接边框节点进行低周反复荷载作用下的一系列有限元变参数分析,研究各种因素的变化对该类节点滞回性能的影响.研究结果表明:新型弱轴盖板连接节点在低周反复荷载作用下,塑性转动能力可达0.03 rad,塑性铰出现在盖板末端的梁截面上,节点域基本处于弹性状态,能较好地满足“强柱弱梁”和“强节点域”的抗震设计理念.建议新型弱轴连接节点选用矩形盖板,盖板最大长度取0.5倍梁截面高度,盖板厚度取0.5倍梁翼缘厚度,且设计中宜控制钢柱的轴压比不超过0.6.
In order to make the cover plate can be used to connect the I-shaped weak axis, a new type of box-shaped I-shaped box-shaped weak axis connection is proposed.Firstly, the mechanical behavior of the cover node under cyclic loading Finite element simulation and experimental comparison. After that, a series of finite element parametric analysis under the condition of low cycle repeated load is carried out to study the influence of various factors on the hysteretic behavior of such joints The results show that the plastic hinge can reach 0.03 rad under the low cyclic load and the plastic hinge appears on the beam cross section at the end of the cover plate, and the node area is basically in the elastic state, which can be better Earthquake-resistant design concept of “strong column weak beam ” and “strong node domain ” is proposed.Recommended the new type of weak axis connection node use rectangular cover plate, cover the maximum length to take 0.5 times the beam cross-section height, cover thickness to take 0.5 Beam flange thickness, and the design should control the axial compression ratio of steel columns does not exceed 0.6.