Research on Seismic Performance of Steel Frames with Blind Bolted Connections
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摘要: 单边螺栓的国产化推动了力学性能优越的方钢管构件在钢结构工程中的应用。H型钢梁、方钢管柱通过T型钢连接件和单边螺栓连接技术形成新型装配式钢框架结构。为了研究这种新型钢框架结构的抗震性能,依据规范设计单层单跨的单边螺栓连接钢框架试验模型并对其进行拟静力试验研究,同时建立精细化有限元模型进行非线性分析,根据试验结果验证有限元模型的准确性。通过研究获得单边螺栓连接钢框架的滞回性能、破坏模式,并分析钢框架的塑性发展特性、侧向刚度退化规律和框架的延性变形能力。研究成果表明:单边螺栓连接钢框架具有较好的抗震性能,能够承受一定的地震作用,研究成果可为装配式钢结构的应用提供一定的参考和借鉴价值。Abstract: The localization of blind bolt production has promoted the application of square steel tube members with excellent mechanical properties in steel structure engineering. A new type of prefabricated steel frame structure is formed by connecting H-shaped steel beams and square steel tube columns using T-stubs and blind bolt connection technology. In order to study the seismic performance of this type of structure, a single-layer single-span steel frame connected by T-stubs and blind bolts was designed and subjected to quasi-static testing.. At the same time, a refined finite element model was established for nonlinear analysis, and the model was verified based on the test results. The hysteresis performance and failure modes of the steel frame connected with blind bolts were obtained, and the plastic development characteristics, lateral stiffness degradation law, and ductility deformation capacity of the steel frame were analyzed. The research results showed that the steel frame connected with blind bolts exhibited good seismic performance and could withstand certain seismic effects. The results provide a certain reference and reference value for the application of prefabricated steel structures.
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Key words:
- steel frame structure /
- T-stub /
- blind bolt /
- quasi-static test /
- seismic performance
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