A review on behavior, material properties and finite element simulation of concrete tunnel linings under fire

Saleheen, Zobaer; Krishnamoorthy, Renga Rao; Nadjai, Ali

doi:10.1016/j.tust.2022.104534

Cited by 13 publications

(3 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, when the segments are damaged after being exposed to high temperatures, the maximum pressure strain is greater than that of the room-temperature segments [ 31 , 32 , 33 , 34 ]. For example, the peak pressure strain of HFRC-3-PF to HFRC-5-PF and HFRC-7 were 2145 × 10 −6 , 2781 × 10 −6 , 2413 × 10 −6 , and 1430 × 10 −6 , respectively.…”

Section: Test Resultsmentioning

confidence: 99%

Test Research on Residual Mechanical Properties of Fiber-Reinforced Concrete Segments after High Temperature

Zong,

Wang,

Wang

et al. 2024

Materials

View full text Add to dashboard Cite

In order to research the residual mechanical properties of concrete shield tunnel segments after exposure to high temperatures, two types of concrete segments were designed: a self-compacting concrete segment and a mixed fiber (steel fiber and polypropylene fiber) self-compacting concrete segment. The mechanical properties of seven blocks of concrete segments (five segments after high-temperature exposure and two segments at room temperature) were tested to analyze the influence of different loading sizes and fibers on the development of cracks after high temperature, failure mode, crack width, deformation, and so on in the concrete segments. The results showed that the damage model of the segment after exposure to high temperature and the segment at room temperature were crushed in the pressurized zone, but the high temperature had little effect on the concrete in the pressurized area. The size of the preload at high temperatures had little effect on the remaining load capacity, and the effect on the number of cracks was mainly concentrated on the internal arc surface of the segment. After high-temperature exposure, the number of cracks on the sides and inner arc surface of the segment increased, and the development of cracks was concentrated as several major cracks at high temperatures. When fibers were incorporated, the cracks in the segment became obvious, where the cracks at the loading point became denser and the interval distance became smaller.

show abstract

Section: Test Resultsmentioning

confidence: 99%

Test Research on Residual Mechanical Properties of Fiber-Reinforced Concrete Segments after High Temperature

Zong,

Wang,

Wang

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…Regarding macroscopic damage, numerous studies have delved into the effects of disasters—such as leakage and fire—on tunnel lining concrete. Research has covered aspects such as the stress of concrete, the duration of fire exposure, and the resulting deformations under varying fire intensities [ 3 , 4 , 5 ]. Guo et al [ 6 ] investigated the correlation between internal damage and applied loads in high-temperature-affected concrete.…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that the divisions are mainly based on damage characteristics, and there are still cracks in other areas. 4 ⃝ The phenomenon of "prominent aggregate expansion" exists in each block; that is, the aggregate expands when heated, and the edge of the aggregate is more obvious and visible in the CT image, as shown in the red area of WA1. This phenomenon is defined as "aggregate protrusion" in this paper.…”

mentioning

confidence: 99%

Macro–Meso Damage Analysis of Tunnel Lining Concrete under Thermal–Mechanical Coupling Based on CT Images

Zheng,

Wang,

Zhang

et al. 2024

Materials

View full text Add to dashboard Cite

The mechanical properties and failure modes of concrete are controlled by its mesoscopic material composition and structure; therefore, it is necessary to study the deterioration characteristics of tunnel lining concrete under fire from a mesoscopic perspective. However, previous studies mostly analyzed the damage and failure process from a macro-homogeneous perspective, which has certain limitations. In this paper, a thermal–mechanical coupling test device was modified to simulate the state of concrete under tunnel fire conditions. Combined with CT technology, the macroscopic properties and mesoscopic characteristics of concrete were observed. Features were obtained, such as the change in compressive strength under fire, as well as mesoscopic deterioration characteristics. The damage variable D was defined to quantify mesoscopic damage, and the link between mesoscopic deterioration characteristics and macroscopic performance was established, which can be used to predict compressive strength loss through mesoscopic characteristics.

show abstract

Thermomechanical Coupling and Performance Analysis of a Fabricated Frame Tunnel with Steel Box Joints

Huang,

Zhang,

Zhang

et al. 2023

Fire Technol

View full text Add to dashboard Cite

A review on behavior, material properties and finite element simulation of concrete tunnel linings under fire

Cited by 13 publications

References 58 publications

Test Research on Residual Mechanical Properties of Fiber-Reinforced Concrete Segments after High Temperature

Test Research on Residual Mechanical Properties of Fiber-Reinforced Concrete Segments after High Temperature

Macro–Meso Damage Analysis of Tunnel Lining Concrete under Thermal–Mechanical Coupling Based on CT Images

Thermomechanical Coupling and Performance Analysis of a Fabricated Frame Tunnel with Steel Box Joints

Contact Info

Product

Resources

About