PCCP管承插口力學性能與失效模式仿真分析
[1]翟科杰,方宏遠,張沖博,等.PCCP管承插口力學性能與失效模式仿真分析[J].中國給水排水,2020,36(20):10-18.
ZHAI Ke-jie,FANG Hong-yuan,ZHANG Chong-bo,et al.Mechanical Properties and Failure Mode Simulation Analysis of Joints in PCCP[J].China Water & Wastewater,2020,36(20):10-18.
點擊復制
ZHAI Ke-jie,FANG Hong-yuan,ZHANG Chong-bo,et al.Mechanical Properties and Failure Mode Simulation Analysis of Joints in PCCP[J].China Water & Wastewater,2020,36(20):10-18.
PCCP管承插口力學性能與失效模式仿真分析
中國給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第36卷 期數: 2020年第20期 頁碼: 10-18 欄目: 出版日期: 2020-10-17
- Title:
- Mechanical Properties and Failure Mode Simulation Analysis of Joints in PCCP
- Keywords:
- prestressed concrete cylinder pipe (PCCP); joint; relative angle; mechanical response; failure analysis
- 摘要:
- 預應力鋼筒混凝土管（PCCP）承插口接頭是易發生破壞的位置。為了研究承插口在發生相對轉角時的受力特性與失效模式，基于非線性有限元建立了PCCP承插口精細化三維模型，結合承插口處各材料應力分布與橡膠圈的滑出失效分析，研究了相對轉角、接頭間隙和配合間隙對承插口的影響。結果表明，當相對轉角達到1.434°時，承插口會因橡膠圈的完全滑出而失效，且承插口處混凝土最易發生拉裂破壞；配合間隙的增加會使橡膠圈滑出量增大，但有助于減小各材料的應力；接頭間隙的增加不利于承插口接頭保護。研究結果可為PCCP管道設計、施工與維護提供依據。
- Abstract:
- The joint of prestressed concrete cylinder pipe (PCCP) is the most vulnerable location. In order to study the mechanical response and failure mode of the joint when the relative angle occurs, a refined three-dimensional model of the PCCP joint was established based on nonlinear finite element method. Combining the stress distribution of each material at the joint and the slip-out failure analysis of the rubber, the effects of the relative angle, joint gap, and the fit clearance on the joint were studied. The results showed that when the relative angle reached 1.434°, the joint would fail due to the rubber slipping out completely, and the concrete at the joint was the most vulnerable to tensile cracking. The slip out of the rubber would increase with the development of fit clearance, but it would help reduce the stress of each material. The increase of the joint gap was not conducive to the protection of the joint. The research results can provide basis for the design, construction and maintenance of PCCP.
更新日期/Last Update: 2020-10-17
