超高层建筑施工整体钢平台钢梁螺栓节点刚度影响因素研究

RESEARCH ON THE INFLUENCING PARAMETERS OF STEEL BEAM BOLTED CONNECTIONS STIFFNESS OF INTEGRAL STEEL PLATFORM FOR SUPER HIGH BUILDINGS CONSTRUCTION

为研究模块化整体钢平台钢梁间连接节点刚度的影响因素,对8个不同构造的主次梁螺栓连接节点进行有限元数值模拟,并通过试验与有限元模拟结果进行对比验证。分析了螺栓规格、节点螺栓数量以及翼缘连接等因素对主次梁螺栓连接节点抗弯刚度的影响。研究结果表明:螺栓孔间隙减小、螺栓个数增加、翼缘连接设置可提高钢平台主次梁螺栓连接节点的抗弯刚度。根据数值模拟结果,对整体钢平台标准化以及主次梁螺栓连接节点构造提出建议。

This article presented a series of numerical parametric investigations on the behavior of steel beam-to-beam bolted connections,which were located in the integral steel platform. The main focus of this research was to investigate the influencing parameters on the connection’s stiffness. A total of 8 finite element models,using the ABAQUS,were built.First of all,one of the FE model was compared with an existing test data to verify the validation and the accuracy of the FE model. Then,some parameters,including bolt size,the number of bolts and flange connection,were analyzed one by one.It was found that decreasing of bolt hole clearance,increasing of bolt numbers and the connection of flanges,would be helpful to improve the bending stiffness of the beam-to-beam connections. This research results could provide guidelines for the design of modular integral steel platform.