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近年来装配式建筑在我国得到了大力推广,其应用越来越广泛。针对预制混凝土梁和型钢混凝土柱的装配式结构体系,提出了一种新型节点:在预制混凝土梁的端部预埋一定长度槽钢,然后通过高强度螺栓与型钢混凝土柱连接。采用ABAQUS有限元软件建立数值模型,研究了槽钢预埋长度、预埋偏心、端部加密箍筋和梁跨中空腔等因素对节点承载力的影响。数值分析结果表明,槽钢预埋长度在100~300mm范围内对承载力影响不是很明显;端部箍筋加密能提高节点的承载力;当槽钢形心轴偏离梁截面形心轴时,因梁受到额外扭转作用而导致承载力下降;梁跨中空腔有利于减小构件自重,但对节点的承载力影响不大。
In recent years, the assembly-type building has been vigorously promoted in our country, and its application is more and more widely. Aiming at the prefabricated concrete beam and steel reinforced concrete column assembly system, a new type of node is proposed: a certain length of channel steel is embedded in the end of prefabricated concrete beam, and then connected to the steel reinforced concrete column by high strength bolts. ABAQUS finite element software was used to establish the numerical model. The influence of embedding length of channel, embedded eccentricity, end confining stirrups and hollow cross-beam cavity on the joint bearing capacity was studied. The results of numerical analysis show that the influence of embedded length of channel on bearing capacity is not obvious in the range of 100-300 mm. The reinforcement of the end stirrup can increase the bearing capacity of the node. When the channel mandrel is deviated from the beam axis, Due to the additional torsion of the beam, the bearing capacity decreases. The hollow space spanning the beam is conducive to reducing the self-weight of the member, but has little effect on the bearing capacity of the joint.