- 張 寬1,馮 新1,李海珍1,劉賢良2
2022年第7期
摘要
引用本文
摘 ? 要:為研究腐蝕斷裂對預應力鋼筒混凝土管(PCCP)失效的影響,建立了PCCP雙區域斷絲三維非線性管-土相互作用有限元模型,得到了不同間距軸向雙區域斷絲情況下管道的損傷演化、失效模式和極限承載能力。結果表明,斷絲區域間距越大,相互影響越小,當間距大于150 cm后,兩個區域之間基本沒有相互作用,其極限內水壓力與單區域斷絲的結果差別顯著。研究結果可為PCCP實際工程中的雙區域斷絲損傷評價及承載能力分析提供參考。
Abstract: In order to study the effect of corrosion fracture on the failure of prestressed concrete cylinder pipe (PCCP), the 3D nonlinear finite element model of PCCP with double-zone broken wires was established to investigate the structural responses and the ultimate internal pressure by considering the pipe-soil interaction. The results show that the greater the distance between the two regions, the smaller the mutual influence. When the interval is greater than 150 cm, it can be considered that there is no interaction between the two regions, and the ultimate internal pressure is much larger than that of the single-zone broken wires with the same axial length. The research results can provide the theoretical basis for multi-region broken wire damage evaluation and bearing capacity analysis in real applications.
張寬,馮新,李海珍,等.雙區域斷絲PCCP極限內水壓力及破壞模式研究[J].混凝土與水泥制品,2022(7):45-49,68.
ZHANG K,FENG X,LI H Z,et al.Study on Failure Modes and Ultimate Internal Pressure for PCCP with Double-zone Broken Wires[J].China Concrete and Cement Products,2022(7):45-49,68.