Abstract

Joints are the key factors that determine the construction difficulty and structural safety of prefabricated steel structures. However, the existing prefabricated joints of square steel tube and H-shaped steel beam frame have few reference forms, and there are still a series of problems in practical engineering applications, such as construction difficulties and poor applicability. Therefore, a new type of column-column-beam joint with variable beam height and its construction scheme are designed in this paper. The joint is bolted rather than welded in the process of field prefabricated. It can solve the problem of vertical and horizontal connection of steel frame structure through one joint at the same time, thus effectively saving construction cost and ensuring construction quality. In addition, the detailed modeling and comprehensive mechanical properties analysis of the joint scheme are carried out in this paper. The ultimate bearing capacity, stiffness characteristics, failure modes and hysteretic behavior of joint schemes under low cyclic loading are also evaluated.

摘要

节点是决定预制钢结构施工难度和结构安全的关键因素。但是，现有的方钢管和H型钢梁框架的预制节点很少有参考形式，在实际工程应用中仍然存在施工困难，适用性差等一系列问题。因此，本文设计了一种新型的变高梁柱-梁-梁节点及其施工方案。在现场预制的过程中，用螺栓连接而不是焊接接头。它可以同时解决一个框架通过一个接缝进行纵横连接的问题，从而有效地节省了施工成本，保证了施工质量。此外，对接头方案进行了详细的建模和综合力学性能分析。还评估了低循环载荷下节点方案的极限承载力，刚度特性，破坏模式和滞回行为。