模块化装配式多高层钢结构全螺栓连接节点静力及抗震性能试验研究

为研究模块化装配式多高层钢结构的全螺栓梁柱连接节点的受力性能，采用GB 50017-2003《钢结构设计规范》中的设计方法，设计了4个该类型节点，对其进行了静力、滞回性能试验和有限元分析，获得了节点的静力性能和滞回性能、骨架曲线、延性性能、转动能力、刚度退化等。结果表明：焊缝质量、板件厚度、螺栓布置等因素对节点破坏模式和各项力学性能影响较大，在弦杆与柱座间的焊缝不过早断裂以及盖板与弦杆接触面不滑移的条件下，该类节点转动刚度较大，节点的承载能力高，延性、耗能能力、塑性转动能力较好。减小桁架梁弦杆和腹杆厚度会显著降低节点承载能力，但对节点的延性性能和耗能能力影响不大。

Experimental study on static and seismic performance of bolted joint in modularized multi-layer and high-rise prefabricated steel structures

In order to study the mechanical property of the bolted beam-column connection applied in modularized multi-story and high-rise prefabricated steel structure, the calculation method in GB 50017—2003 ‘Code for design of steel structures’ was used to design the connection. The static test,quasi-static test and finite element analysis were carried on four connections. The static performance and seismic performance including hysteretic performance, skeleton curve, ductility performance, rotational capacity and stiffness degradation of the connection were obtained. The result shows that the weld quality, plate thickness and bolt arrangement have great influences on failure mode and many mechanical properties of the connection. The rotational stiffness is great, the bearing capacity of this connection is high, and the ductility performance, energy dissipation capacity and the plastic rotation capacity is good under the condition that the welds between chord and column base do not prematurely fracture and the contacting surface between cover plate and chord don’t slip. Reducing the thickness of the chord and web of truss girder will significantly reduce the bearing capacity of this connection, but it has little influence on ductility performance and energy dissipation capacity of the connection.