Keywords
Field test
Finite element calculation
Hazard analysis
Submitted : 2025-02-10
Accepted : 2025-02-25
Published : 2025-03-12
Abstract
The longitudinal cracks distributed along the dam axis in the corridor of a dam may have potential safety hazards. According to the detection results of crack depth and width and the analysis of monitoring data, a three-dimensional finite element model is established for numerical simulation calculation and the influence of cracks on the safety of dam structure is analyzed from different aspects such as deformation, stress value, and distribution range. The calculation results show that the maximum principal tensile stress value and the location of the dam body are basically independent of the change of crack depth (within 1.0 m). Regarding local stress around the corridor, the high upstream water level causes cracks to deepen, resulting in an increase in the maximum tensile stress near the crack tip and an expansion of the tensile stress region.
References
Han S, Gen W, 2004, Guide for Crack Control of Reinforced Concrete Structures. Chemical Industry Press, Beijing.
Zhu B, 2009, Principle and Application of Finite Element Method. China Water Power Press, Bei-jing.
Henshell R, Shaw K, 1975, Crack Tip Finite Elements Are Unnecessary. International Journal for Numerical Methods in Engineering, 9: 495–507.
Xing L, 2002, New Progress in Dam Safety Evaluation of Hydropower Stations in China. Water Power, 7: 64–67.
Gioda G, 1980, Indirect Identification of the Average Elastic Characteristics of Rock Masses. Proc. Int. Conf. on Structure Foundations on Rock, Sydney, 1: 30–35.
Okodi A, Lin M, Yoosef-Ghodsi N, 2020, Crack Propagation and Burst Pressure of Longitudinally Cracked Pipelines Using Extended Finite Element Method. International Journal of Pressure Vessels and Piping, 184(5): 1–10.
Sanchez-Rivadeneira A, Shauer N, Mazurowski B, 2020, A Stable Generalized/Extended p-Hierarchical FEM for Three-Dimensional Linear Elastic Fracture Mechanics. Computer Methods in Applied Mechanics and Engineering, 364(4): 1–46
Jiang Y, Dong J, Nie D, 2021, XFEM With Partial Heaviside Function Enrichment for Fracture Analysis. Engineering Fracture Mechanics, 241: 107375.
Liu Y, Zhang G, Tan Y, 2021, Key Techniques for Dam Construction Simulations. Journal of Tsing-hua University (Science & Technology), 61: 714–723.
Lin P, Ning Z, Shi J, 2021, Study on the Gallery Structure Cracking Mechanisms and Cracking Control in Dam Construction Site. Engineering Failure Analysis, 121(2): 105135.
Wei P, Lin P, Peng H, 2021, Analysis of Cracking Mechanism of Concrete Galleries in a Super High Arch Dam. Engineering Structures, 248(1): 113227.