A method to analyze the long-term durability performance of underground reinforced concrete culvert structures under coupled mechanical and environmental loads

Abstract

Keywordsunderground structures reinforced concrete (RC) coupling calculation sensitivity analysis top plate deflection durabilityThe coupling effect of mechanical and environmental loads is the main cause of deterioration in the performance of reinforced concrete (RC) structures. However, most studies on the durability of RC structures have focused only on mechanical or environmental loads. As a result, it is difficult to fully capture the effects of dry shrinkage and creep caused by temperature and humidity changes within the structure, as well as their impact on the overall deformation of the structure. To address this gap, this paper presents a numerical simulation of underground culvert projects using the durability concrete model-complex three-dimensional (DuCOM-COM3D) analysis software. The results of the simulation demonstrate that this approach offers a more precise characterization of the porosity, temperature, and humidity inside the concrete, resulting in improved accuracy in predicting the longterm deflection, crack width, and other macro-mechanical indices of the structure. Despite these advantages, some discrepancies were observed between the calculated and measured long-term deflection values. Additionally, a limit analysis was conducted to investigate the potential causes of the large deformation observed in the measurements. Overall, the results contribute to a better understanding of the complex mechanical and environmental loads affecting RC structures and provide a methodology for accurately simulating their long-term behavior.

Resilient and Sustainable Structures through EMI-Based SHM Evaluation of an Innovative C-FRP Rope Strengthening Technique

“…In recent decades, fiber-reinforced polymers (FRPs) bonded externally with epoxy resins have emerged as go-to solutions for rehabilitating [17][18][19], reinforcing, upgrading, and repairing reinforced concrete (RC) structures. These applications span various structural elements [20], including shear-reinforced beams [21,22], torsion-reinforced beams [23], and shear-reinforced beam-column sub-assemblages [24], owing to their myriad advantages. These advantages include high tensile and fatigue strength, lightweight properties, and exceptional corrosion resistance [25,26].…”

Behavior of Concrete-Filled Steel Tube Columns with Multiple Chambers and Round-Ended Cross-Sections under Axial Loading

“…In actual engineering, the axial compression performance is a key property for structures. To date, numerous experimental and finite element analysis (FEA) research have been conducted on the property of CFT stub columns or other structures under axial compression, and the research provided ideas for this study [9][10][11][12][13][14][15][16][17].…”

“…In addition, Wang et al [20] and Ding et al [21] conducted a numerical investigation on the compressive properties of CFRT stub columns and proposed a novel method, which involves the welding of bidi- In actual engineering, the axial compression performance is a key property for structures. To date, numerous experimental and finite element analysis (FEA) research have been conducted on the property of CFT stub columns or other structures under axial compression, and the research provided ideas for this study [9][10][11][12][13][14][15][16][17].…”

Effect of groundwater decline on plant induced by tunnel excavation and calculation of ecological water level based on SPAC model

“…The intelligence and informatization of tunnel drainage are development directions of intelligent construction of the tunnel. High underground water pressure and corrosive ions in groundwater can affect the safety and durability of tunnels [1][2][3]. In the past tunnel construction, the treatment of groundwater was mainly based on drainage, which could significantly reduce the water pressure of the tunnel lining [4], prevent water inrush [5], and ensure the safety of the tunnel structure [6].…”