Durability of Subsea Tunnels under the Coupled Action of Stress and Chloride Ions

Zhao, Qingli; Lu, Limin

doi:10.3390/app9101984

Cited by 3 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The chloride ingress process is further complicated by chloride binding, ionic interaction, aging factors, temperature, humidity, and submerged pressure effects [33][34][35]. Subsequent durability modelling is complicated by the presence of cracks in the concrete, the relative sustained or fatigue stress in the internal reinforcing, and reinforcing alloy and microstructure [36][37][38].…”

Section: The Inevitability Of Corrosion In Coastal Structures With Traditional Materialsmentioning

confidence: 99%

New directions for reinforced concrete coastal structures

Nolan

Rossini

Knight

et al. 2021

J Infrastruct Preserv Resil

View full text Add to dashboard Cite

Within the last century, coastal structures for infrastructure applications have traditionally been constructed with timber, structural steel, and/or steel-reinforced/prestressed concrete. Given asset owners’ desires for increased service-life; reduced maintenance, repair and rehabilitation; liability; resilience; and sustainability, it has become clear that traditional construction materials cannot reliably meet these challenges without periodic and costly intervention. Fiber-Reinforced Polymer (FRP) composites have been successfully utilized for durable bridge applications for several decades, demonstrating their ability to provide reduced maintenance costs, extend service life, and significantly increase design durability. This paper explores a representative sample of these applications, related specifically to internal reinforcement for concrete structures in both passive (RC) and pre-tensioned (PC) applications, and contrasts them with the time-dependent effect and cost of corrosion in transportation infrastructure. Recent development of authoritative design guidelines within the US and international engineering communities is summarized and a examples of RC/PC verses FRP-RC/PC presented to show the sustainable (economic and environmental) advantage of composite structures in the coastal environment.

show abstract

Section: The Inevitability Of Corrosion In Coastal Structures With Traditional Materialsmentioning

confidence: 99%

New directions for reinforced concrete coastal structures

Nolan

Rossini

Knight

et al. 2021

J Infrastruct Preserv Resil

View full text Add to dashboard Cite

show abstract

Magnesium ion corrosion in subsea tunnel grouting: Insights, mechanisms, and optimization strategies for enhanced durability

Li,

Yang,

Dong

et al. 2024

Marine Georesources & Geotechnology

View full text Add to dashboard Cite

Numerical Investigation of the Long-Term Service Performance of Subsea Tunnel Lining Structure Considering Ion Erosion Deterioration

Yang,

Yang

et al. 2024

Sustainability

View full text Add to dashboard Cite

Ion erosion has a significant impact on the long-term service performance of lining structures in the subsea tunnel and seriously affects its sustainability. Indoor tests are usually used to study the erosion behavior of lining concrete specimens to reveal the degradation pattern of ion erosion. However, the long-term service performance of lining structures under ion erosion is rarely considered in the industry. In this study, the long-term deterioration characteristics of concrete specimens and subsea tunnel linings are analyzed by using numerical investigations. The long-term diffusion patterns of erosion ions in concrete specimens are evaluated. The effects of ion erosion and water pressure on the stress, deformation, and damage characteristics of the lining structure are examined. The numerical results show that solution concentrations and concrete grades have a significant influence on the ion diffusion in concrete specimens. As the erosion time increases, the rate of ion diffusion gradually decreases due to the decrease in the concentration difference between the inside and outside of the concrete. The service time T has a significant effect on the depth and rate of ion erosion. When T is 10, 50, and 100 years, the depth of ion erosion reaches 25, 63, and 84 mm, respectively, showing a nonlinear increase. As the depth of ion erosion increases, the characteristic parameters reflecting the long-term performance of the lining structure will increase. The maximum tensile stress is 0.98 MPa, and the maximum displacement is 1.59 cm, both of which occur at the arch crown. Disregarding the effects of ion erosion and water pressure, the vertical displacements of the lining structure within the first two years under low loads account for more than 97% of the 100-year displacements. Both ion erosion and water pressure exacerbate the damage deterioration of the lining, in which ion erosion significantly increases the maximum tensile stress of the lining, with a maximum enhancement of 326.09%, and water pressure significantly enlarges the maximum compressive stress of the lining, with a maximum enhancement of 53.23%. However, with increasing depths of ion erosion, the high water pressure will reduce the maximum tensile stress. This study can lay the foundation for further research on the long-term stability of the lining under complex erosion environments.

show abstract

Durability of Subsea Tunnels under the Coupled Action of Stress and Chloride Ions

Cited by 3 publications

References 17 publications

New directions for reinforced concrete coastal structures

New directions for reinforced concrete coastal structures

Magnesium ion corrosion in subsea tunnel grouting: Insights, mechanisms, and optimization strategies for enhanced durability

Numerical Investigation of the Long-Term Service Performance of Subsea Tunnel Lining Structure Considering Ion Erosion Deterioration

Contact Info

Product

Resources

About