| 引用本文: | 钟紫蓝,张亚波,罗盼盼,韩俊艳,侯本伟.球墨铸铁管道新型抗震接口力学性能试验及数值模拟[J].哈尔滨工业大学学报,2024,56(6):72.DOI:10.11918/202302003 |
| ZHONG Zilan,ZHANG Yabo,LUO Panpan,HAN Junyan,HOU Benwei.Experimental study and numerical simulations of mechanical properties of anti-seismic joints for ductile iron pipes[J].Journal of Harbin Institute of Technology,2024,56(6):72.DOI:10.11918/202302003 |
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| 摘要: |
| 有效的管线接口抗震措施是优化城市供水管网抗震性能和震后功能恢复能力的关键。为此,基于机械自锚设计和自变形补偿等思想,提出一种球墨铸铁管道新型自锚式抗震接口。开展普通承插式接口和新型抗震接口的轴向拉伸拟静力试验及抗震接口精细化三维有限元数值模拟,研究新型管道接口的抗拉承载能力、初始抗拉刚度、抗变形能力和极限破坏状态等力学特性。结果表明:0.2 MPa以内的水压变幅对普通承插式接口的轴向力学性能和破坏方式的影响不大,接口初始漏水至功能失效状态的过渡变形约为2.5 mm；新型自锚式抗震接口具备良好的承载能力和抵抗大变形能力,其抗拉力学性能曲线分为3个阶段,即胶圈受力阶段、卡环受力阶段和卡环失效破坏,其中,在卡环变形量为9 mm左右时,达到峰值承载力330 kN左右。 |
| 关键词: 球墨铸铁管道 新型抗震接口 力学性能 抗拉强度 数值模拟 |
| DOI：10.11918/202302003 |
| 分类号:TU990.3 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2022YFC3003603);国家自然科学基金面上项目(51978020) |
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| Experimental study and numerical simulations of mechanical properties of anti-seismic joints for ductile iron pipes |
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ZHONG Zilan,ZHANG Yabo,LUO Panpan,HAN Junyan,HOU Benwei
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(Key Lab of Urban Security and Disaster Engineering (Beijing University of Technology), Ministry of Education, Beijing 100124, China)
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| Abstract: |
| Effective seismic measures for pipeline joints are the key to optimizing the seismic performance and post-earthquake functional recovery capability of urban water supply pipeline networks. In this paper, a new type of self-anchored anti-seismic joint for ductile iron pipes is proposed based on the thoughts of mechanical self-anchoring design and self-deformation compensation. This article conducted axial tensile quasi-static tests and refined three-dimensional finite element numerical simulations of anti-seismic joint, and studied the mechanical characteristics of the anti-seismic joint, including tensile bearing capacity, initial tensile stiffness, deformation resistance, and ultimate damage state. The research results show that the water pressure variation within 0.2 MPa has little effect on the axial mechanical properties and damage mode of the common push-on joint, and the transition deformation from the initial leakage to the functional failure state of the joint is about 2.5 mm; the new self-anchored anti-seismic joint has good tensile bearing capacity and resistance to large deformation, and its tension resistance curve is divided into three stages: the gasket bearing stage, the snap ring bearing stage and failure damage. When the deformation of the snap ring is about 9 mm, it reaches a peak bearing capacity of about 330 kN. |
| Key words: ductile iron pipe anti-seismic joint mechanical properties tensile strength numerical simulation |
