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Abstract
The use of fracture mechanics theory in the design of reinforced concrete retaining walls is an advanced method that helps to more accurately assess the load-bearing capacity and durability of the structure, especially when considering the formation and propagation of cracks in the material.
In this paper, the author analyzes the structural components of a revetment constructed from prestressed reinforced concrete piles and introduces a calculation method based on fracture mechanics theory. Through the comparison of calculation results from a specific example, the author evaluates the advantages and limitations of applying fracture mechanics theory and TCVN 5574:2018 in the design of retaining structures using prestressed reinforced concrete piles. The results of crack width calculations according to Eurocode 2-2004 are significantly smaller than those according to TCVN 5574:2018. Based on this, the author proposes applying crack width calculations based on Eurocode 2-2004, which utilizes the Linear Elastic Fracture Mechanics (LEFM) model. This model aligns with the assumptions of elastic behavior in concrete and reinforcement under normal loading conditions, simplifying the calculation process while ensuring the necessary accuracy. It is well-suited for the design of revetment structure using prestressed reinforced concrete sheet piles in Vietnam.