新型模块化钢结构梁柱装配节点及其承载性能分析

Analysis on the Bearing Capacity of a Novel Modular Steel Structure Beam-Column Assembly Joint

摘要: 针对传统模块化钢结构闭口截面内部施焊困难及螺栓连接削弱截面等局限，本文提出了一种集成“十字型导向槽”与“工字型卡槽”的新型全焊接装配式方钢管梁柱节点。该节点借助专用连接件实现了吊装过程的精准定位与自动对中；其采用的外部全焊接工艺，有效避免了柱壁开孔导致的性能削弱，确保了构件截面的力学完整性。本文深入剖析了该节点的传力机制，分别构建了其在受拉、受剪及受弯工况下的承载力理论计算模型，并利用ABAQUS有限元软件进行了可靠性验证。分析结果表明：该节点传力路径明确且顺畅，符合“强节点、弱构件”的抗震设计原则；各工况下的理论计算值与有限元模拟值高度吻合，充分证明了理论公式的准确性与工程安全性。本研究可为该类新型装配式节点的工程推广与应用提供重要的理论参考。

Abstract: In response to the limitations of traditional modular steel structures, such as the difficulty in internal welding of closed sections and the weakening of the section due to bolt connections, this paper proposes a new fully welded prefabricated square steel tube beam-column joint that integrates a “cross-shaped guide slot” and an “I-shaped slot”. This joint uses a dedicated connection component to achieve precise positioning and automatic centering during the hoisting process; its external full welding process effectively avoids the performance weakening caused by column wall openings, ensuring the mechanical integrity of the component section. This paper deeply analyzes the force transmission mechanism of this joint, respectively constructs theoretical calculation models for its bearing capacity under tension, shear and bending conditions, and uses ABAQUS finite element software for reliability verification. The analysis results show that the force transmission path of this joint is clear and smooth, in line with the seismic design principle of “strong joint, weak member”; the theoretical calculation values under each condition are highly consistent with the finite element simulation values, fully demonstrating the accuracy of the theoretical formula and the engineering safety. This research can provide important theoretical references for the engineering promotion and application of this type of new prefabricated joint.