| 引用本文: | 曹正罡,王佳龙,王志成,赵林.输电塔K型纵板加劲相贯节点抗压承载力研究[J].哈尔滨工业大学学报,2020,52(10):28.DOI:10.11918/201905052 |
| CAO Zhenggang,WANG Jialong,WANG Zhicheng,ZHAO Lin.Study on compressive bearing capacity of K-type longitudinal plate stiffened tubular joints of transmission towers[J].Journal of Harbin Institute of Technology,2020,52(10):28.DOI:10.11918/201905052 |
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| 输电塔K型纵板加劲相贯节点抗压承载力研究 |
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曹正罡1,2,王佳龙1,2,王志成1,2,赵林1,2
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(1.结构工程灾变与控制教育部重点实验室(哈尔滨工业大学),哈尔滨150090; 2.土木工程智能防灾减灾工业和信息化部重点实验室(哈尔滨工业大学),哈尔滨150090;)
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| 摘要: |
| 特高压大跨越输电塔采用的纵板加劲节点研究一直较为滞后,设计过程中始终未考虑加劲对节点承载力的影响,中国规范也尚未有明确的计算方法.为此,重点针对K型纵板加劲圆管相贯节点开展系统弹塑性极限承载力研究,结合各几何参数变化,统计分析节点的极限承载力,进一步基于节点塑性区扩展过程,探寻其失效模式并揭示破坏机理；从设计角度总结各参数对节点极限承载力的影响规律.通过多元线性回归,确定了节点极限承载力计算公式,提出纵板加劲节点的承载力修正方法.与数值分析结果对比表明简化公式具有较好的精度,可有效简化计算纵板加劲相贯节点的承载力设计值,指导大跨越输电塔工程的节点设计. |
| 关键词: K型节点 纵板加劲 有限元分析 简化计算方法 抗压极限承载力 |
| DOI：10.11918/201905052 |
| 分类号:TU392.3 |
| 文献标识码:A |
| 基金项目:国家自然科学基金面上项目(51878218) |
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| Study on compressive bearing capacity of K-type longitudinal plate stiffened tubular joints of transmission towers |
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CAO Zhenggang1,2,WANG Jialong1,2,WANG Zhicheng1,2,ZHAO Lin1,2
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(1.Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, China; 2.Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters (Harbin Institute of Technology), Ministry of Industry and Information Technology, Harbin 150090, China)
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| Abstract: |
| The research on longitudinal plate stiffened joints used in UHV long-span transmission towers has been lagging behind. The effect of stiffening on the bearing capacity of joints has not been considered in design process, and there is no explicit calculation method in the national code. Therefore, emphasis was placed on the systematic research of elastic-plastic ultimate bearing capacity of K-type longitudinal plate stiffened tubular joints. The ultimate bearing capacity of the joints was analyzed combined with the variation of geometric parameters, and the failure modes and failure mechanism of the joints were further explored based on the expansion process of the plastic zone of the joints. Effect of each parameter on the ultimate bearing capacity of joints was summarized from the design point of view. Through multiple linear regression, the calculation formula of the ultimate bearing capacity of joints was obtained, and a method of modifying the bearing capacity of longitudinal stiffened joints was proposed. Compared with the results of numerical analysis, the simplified formula had good accuracy, which can effectively simplify the calculation of the bearing capacity of longitudinal stiffened tubular joints and guide the joint design of long-span transmission tower projects. |
| Key words: K-type joint longitudinal plate stiffened finite element analysis simplified calculation method ultimate bearing capacity |
