Thermal Behavior of Tunnel Segment Joints Exposed to Fire and Strengthening of Fire-damaged Joints with Concrete-filled Steel Tubes

Wu, Bo; Luo, Yuechun; Zang, Jian-Bo

doi:10.3390/app9091781

Cited by 10 publications

(7 citation statements)

References 21 publications

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“…The shear strength of the beams varies when it is exposed to high temperature (Khan et al , 2010). Due to the thermal effect, spalling of concrete occurs at high temperature (Wu et al , 2019).…”

Section: Reinforced Concrete Elementsmentioning

confidence: 99%

A review on research of fire-induced progressive collapse on structures

Vishal

Satyanarayanan

2021

JSFE

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Purpose This paper delineates a literature review on fire-induced progressive collapse on structures and the effect of high temperature on structures and elements. After the occurrences of fire in the World Trade Center in the USA, the researchers started concentrating on the progressive collapse that happens due to high temperature. Currently, most of the researchers are working on fire-induced progressive collapse on structures using high-temperature behavior on materials which are used for construction. The researchers have been doing an intensive study to find a better strategy to prevent the building from structural fire damage or collapse with available codes and guidelines throughout the world. This paper aims to provide a better understanding and analytical solutions on the basis of the recent works done by researchers in fire-induced progressive collapse and methods adopted to find the collapse mechanism. Design/methodology/approach This paper is written by studying different literature papers of 109 related to progressive collapse on structures and fire-induced progressive collapse. Findings The behavior of structures due to high temperature and collapse conditions due to fire in different scenarios is identified. Originality/value This paper fulfills an identified need to study how the structure can withstand high-temperature conditions in our day-to-day lives.

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Section: Reinforced Concrete Elementsmentioning

confidence: 99%

A review on research of fire-induced progressive collapse on structures

Vishal

Satyanarayanan

2021

JSFE

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“…2022, 12, x FOR PEER REVIEW 2 of 15 and theoretical analysis. These researches indicate that the joint rotations are very complex, and the joint rotational stiffnesses present obvious nonlinear characteristics with the influences of the complexity and diversity of segment joint types, structural dimensions, involved materials, and environmental conditions [9][10][11][12]. To calculate the joint rotation stiffness accurately, some analytical approaches are proposed for the segmental joints.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in recent years, an enormous amount of research effort goes into the joint rotations from the aspects of experimental test, numerical simulation, and theoretical analysis. These researches indicate that the joint rotations are very complex, and the joint rotational stiffnesses present obvious nonlinear characteristics with the influences of the complexity and diversity of segment joint types, structural dimensions, involved materials, and environmental conditions [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

An Improved Analytical Approach for Segmental Joint Rotational Behavior Considering the Elastic Gasket

Huang

Yang

2022

Applied Sciences

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To fully consider the effect of elastic gasket (EG) on the segmental joint rotational behavior, an improved analytical approach is proposed to simulate the joint rotations and obtain the rotational stiffnesses. By comparing the analytical results with the experimental results and numerical results, the joint compression zone should be simulated by the concrete–EG–concrete (CGC) model instead of rigid–EG–rigid (RGR) model or concrete–concrete (CC) model. Since the analytical approach with the CGC model can simulate the combined work of EG and concrete well, it is a more effective approach to obtain the joint rotational stiffnesses. According to these analytical results, the EG has a great impact on softening the joint rotations, and this leads the rotational stiffnesses of the joint with EG to be evidently smaller than those of the joint without EG. In addition, with decreasing the axial force or increasing the EG thickness, this softening effect tends to be more obvious. Therefore, the EG is a significant factor which should be fully considered during the theoretical analysis for the joint rotation behavior, or it may lead to an unreliable design for the segmental lining.

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“…Yan et al [3] conducted extended finite element analysis to investigate the cracking and failure characteristics of the segmental lining structure of an underwater shield tunnel upon a derailed high-speed train impact, allowing for the optimization of tunnel design under accidental conditions. Wu et al [4] investigated the thermal behavior of tunnel segment joints when exposed to fire, and the effectiveness of using concrete-filled steel tubes (CFSTs) to restore joint strength after a fire was also investigated. Wang et al [5] proposed a novel multiscale modeling method in which potentially damaged and undamaged zones were recognized according to preanalysis results and then simulated at different scales.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on the Fracture Properties of Concrete Shield Tunnel Lining Segments

2021

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Shield tunnel lining structure is usually under very complex loading conditions in the underground space. As a kind of the common concrete structures, any defect in the tunnel lining segment may deteriorate its bearing capacity and even cause severe disasters. Three-dimensional numerical models of shield tunnel lining segments with initial cracks are built using the Symmetric Galerkin Boundary Element Method- (SGBEM-) Finite Element Method (FEM) Alternating Method. The cracking load and ultimate load of the tunnel segments are obtained, and crack propagation under fatigue load is also simulated by employing the Paris Fatigue Law. Results show that loading eccentricity has a very large influence on the bearing capacity of the cracked lining segment; the larger the loading eccentricity, the smaller the bearing capacity. Deformation and damage of the lining segment show obvious phases, which consist of the initial crack, cracking stage, steady crack propagation, unsteady crack propagation, and eventual failure.

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Thermal Behavior of Tunnel Segment Joints Exposed to Fire and Strengthening of Fire-damaged Joints with Concrete-filled Steel Tubes

Cited by 10 publications

References 21 publications

A review on research of fire-induced progressive collapse on structures

A review on research of fire-induced progressive collapse on structures

An Improved Analytical Approach for Segmental Joint Rotational Behavior Considering the Elastic Gasket

Numerical Study on the Fracture Properties of Concrete Shield Tunnel Lining Segments

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