In prefabricated modular steel building, joint plays an important role in the structural behaviour and transfer of load among connected modules. In this paper, a new type of bolted joint with tenon-gusset plate as horizontal connection and long beam bolts as vertical connection has been proposed. The nonlinear structural behaviour of the novel joint was analysed against static and quasi-static cyclic loadings by using finite element (FE) software ABAQUS. Numerical study was carried out to predict the lateral load carrying capacity, bending moment capacity, rotational stiffness, failure modes and seismic behaviour of the joint. Connection was simplified with nonlinear spring connector and 3-D beam elements. Parametric study was carried out on the length of column tenon and gap between adjacent modular units. The results revealed that against lateral loads, the gap was generated between the upper and lower parts of joint which resulted in the bearing failure of floor beam (FB). The length of column tenon has obvious while gap between modules showed marginal effect on load carrying capacity and structural behaviour of joint. The simplified joint accurately mimicked load–displacement curve and structural behaviour of detailed joint. Then, FE analysis was justified by analysing test results of innovative connection in the reference. With these evidences, the veracity of the FE analysis for studying nonlinear behaviour of novel joint was confirmed.

中文翻译：

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预制模块化钢结构建筑新型节点抗震性能的有限元分析

在预制的模块化钢结构建筑中，接头在结构行为和连接模块之间的荷载传递中起着重要作用。提出了一种以榫-板为水平连接，以长梁螺栓为垂直连接的新型螺栓连接。使用有限元（FE）软件ABAQUS分析了新型接头在静态和准静态循环载荷下的非线性结构行为。进行了数值研究，以预测接头的侧向承载能力，弯矩能力，旋转刚度，破坏模式和地震行为。非线性弹簧连接器和3-D梁元件简化了连接。对柱榫的长度和相邻模块单元之间的间隙进行了参数研究。结果表明，在承受侧向载荷的情况下，接头的上部和下部之间会产生间隙，从而导致地板梁（FB）的轴承失效。柱榫的长度很明显，而模块之间的间隙对接头的承载能力和接头的结构性能影响很小。简化的接头精确地模仿了详细的接头的荷载-位移曲线和结构行为。然后，通过在参考文献中分析创新连接的测试结果来证明有限元分析是合理的。利用这些证据，证实了有限元分析在研究新型接头非线性行为方面的准确性。柱榫的长度很明显，而模块之间的间隙对接头的承载能力和接头的结构性能影响很小。简化的接头精确地模仿了详细的接头的荷载-位移曲线和结构行为。然后，通过在参考文献中分析创新连接的测试结果来证明有限元分析是合理的。利用这些证据，证实了有限元分析在研究新型接头非线性行为方面的准确性。柱榫的长度很明显，而模块之间的间隙对接头的承载能力和接头的结构性能影响很小。简化的接头精确地模拟了载荷-位移曲线和细部接头的结构行为。然后，通过在参考文献中分析创新连接的测试结果来证明有限元分析是合理的。利用这些证据，证实了有限元分析在研究新型接头非线性行为方面的准确性。