Research and Development of Large-Diameter Bolted Spherical Joints for Spatial Grid Structures and the Compilation of Their Standards
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摘要: 为了满足超大跨度空间网格结构对大直径螺栓球节点的应用需求,设计了M90×6~M120×6的大直径螺栓,并对10个M100×6大直径螺栓实物试件和9个M120×6大直径螺栓的机械加工试件进行了单向拉伸试验,试验结果得到的力学性能指标均满足要求。对M90×6~M120×6大直径螺栓配套锥头进行了设计,采用ABAQUS有限元软件对M90×6~M120×6大直径螺栓配套锥头进行了受拉和受压力学性能的研究,验证了锥头设计的合理性。基于上述研发成果,申报立项并编制完成了M90×6~M120×6大直径螺栓标准。Abstract: In order to meet the application requirements of super-long-span spatial grid structures for large-diameter bolted spherical joints, M90×6 to M120×6 large-diameter bolts were designed. Uniaxial tensile tests were conducted on ten full-scale M100×6 specimens and nine machined M120×6 specimens. The test results showed that their mechanical property indicators all met the requirements. The corresponding tapered heads for M90×6 to M120×6 large-diameter bolts were also designed, and their tensile and stress properties were investigated using ABAQUS. The simulation results validated the rationality of the tapered head design. Based on the above research and development outcomes, the standard for M90×6 to M120×6 large-diameter bolts was successfully applied for project approval and compiled.
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