| 引用本文: | 吴琼尧,王化杰,钱宏亮,韩康,范峰.拧入缺陷对螺栓球节点受力性能影响[J].哈尔滨工业大学学报,2017,49(12):53.DOI:10.11918/j.issn.0367-6234.201703115 |
| WU Qiongyao,WANG Huajie,QIAN Hongliang,HAN Kang,FAN Feng.Study on influence caused by bolt-connection defect on mechanical properties of bolt-ball joint[J].Journal of Harbin Institute of Technology,2017,49(12):53.DOI:10.11918/j.issn.0367-6234.201703115 |
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| 拧入缺陷对螺栓球节点受力性能影响 |
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吴琼尧1,王化杰1,2,钱宏亮1,2,韩康1,范峰2
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(1.哈尔滨工业大学(威海)土木工程系,山东 威海 264209;2.哈尔滨工业大学 土木工程学院,哈尔滨 150090)
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| 摘要: |
| 螺栓球节点在空间网格结构中应用广泛，然而由于其组成构件较多，在安装过程中容易出现高强螺栓拧入长度不足的初始缺陷.为研究该缺陷对螺栓球节点受力性能的影响，采用ANSYS软件建立了带有螺纹的螺栓球节点精细化模型，通过改变螺纹的啮合数来模拟高强螺栓的拧入长度，并利用已有试验数据对模拟方法的准确性进行了验证.在此基础上，对M20、M24、M27三种常用节点在不同拧入长度下的抗弯性能进行分析，结果表明螺栓球节点随着拧入长度的变化主要存在三种工作及破坏模式，高强螺栓拧入长度不足可严重降低节点刚度及其极限承载力.最后对上述三种节点在不同拧入长度下的抗拉性能进行模拟分析，得到了不同拧入长度下螺栓球节点抗拉承载力的退化规律及可能的破坏模式，给出了抗拉承载力降低比例与螺栓拧入长度的关系曲线，研究成果可为螺栓球节点的施工控制及相似结构的安全性能评估提供技术参考.
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| 关键词: 螺栓球节点 拧入缺陷 螺纹 弯曲刚度 数值模拟 |
| DOI：10.11918/j.issn.0367-6234.201703115 |
| 分类号:TU393.3 |
| 文献标识码:A |
| 基金项目:国家自然科学基金青年基金(51308154)；威海市科技发展计划(2016DXGJMS03)；国家重点研发计划(2016YFC0802003) |
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| Study on influence caused by bolt-connection defect on mechanical properties of bolt-ball joint |
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WU Qiongyao1,WANG Huajie1,2,QIAN Hongliang1,2,HAN Kang1,FAN Feng2
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(1.Department of Civil Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, Shandong, China; 2.School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)
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| Abstract: |
| The bolt-ball joint, which have wide application in spatial lattice structure, have too many components, so the initial defect may be caused by the screw length insufficiency of the high-strength bolt during installation process. To study the effect of the defect on the mechanical properties of these joints, a sophisticated FEM simulation model of the bolt-ball joint with thread was calculated by ANSYS. The number of thread engagement was changed to simulate the screw length of high-strength bolt, and the simulation method was verified by existing experimental data. The flexural behavior of three common joints (M20, M24, M27) under different screw length was analyzed. The result shows that the bolt-ball joints mainly have three work and failure modes when the screw length is changed. The screw length insufficiency of the high-strength bolt significantly reduces stiffness and bearing capacity of the joint. The tensile property of three joints under different screw length was analyzed, and the deterioration law of the tensile bearing capacity and the possible failure modes were found. The curve which shows the relationship between the reduced proportion of the tensile bearing capacity and the screw length was given. This study can provide technical references for the construction control of the bolt-ball joint and the safety performance evaluation of the similar structure.
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| Key words: bolt-ball joint bolt-connection defect thread bending stiffness numerical simulation |
