Fire Thermal Stress and its Damage to Subsea Immersed Tunnel

Guo, Jun; Jiang, Shuping; Zhang, Zhuyong

doi:10.1016/j.proeng.2016.11.552

Cited by 22 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the following analysis, the impact of a fire on the relevant elastic modulus of tunnel lining is first introduced and then the influence of a fire on the lining behavior is investigated. To study a fire impact on the internal forces of tunnel lining, the temperature of lining structure is assumed to vary from 100 • C to 800 • C [29]. As the temperature in the tunnel lining rises rapidly in a very short time, it is assumed that the heat in tunnel lining generated by a fire could not be transmitted to the surrounding ground.…”

Section: Impact Of Fires On the Internal Forces Of Tunnel Liningmentioning

confidence: 99%

“…The additional thermal load from ground is therefore neglected and only the additional thermal load from tunnel lining is taken into account in the following analysis. In addition, as Guo et al [29] found that the coefficient of thermal expansion α Tl of tunnel lining is not sensitive to temperature; it is assumed that α Tl remains unchanged under different temperatures.…”

Section: Impact Of Fires On the Internal Forces Of Tunnel Liningmentioning

confidence: 99%

See 1 more Smart Citation

A Simplified Way to Evaluate the Effect of Temperature on a Circular Tunnel

Dias

Anh

2021

Geotechnics

View full text Add to dashboard Cite

Temperature differences between the surrounding ground and the tunnel lining will cause a variation of the tunnel lining forces. The hyperstatic reaction method (HRM) could be efficiently and simply used to investigate the impact of thermal load on tunnel linings. First, the steady state numerical solution is derived for a shallow circular tunnel to estimate the internal forces and displacements of tunnel lining caused by thermal load. The effective strain coefficient βTl is deduced to calculate the thermal stresses in tunnel lining. Secondly, the influence of the temperature difference on the internal forces of tunnel lining is investigated using the HRM method considering different lining elastic modulus, lining thickness and ground coefficient of thermal expansion. Lastly, the impact of fires which will be able to modify the elastic modulus of tunnel lining is investigated, which makes it possible to predict the damage of tunnel lining caused by fires.

show abstract

Section: Impact Of Fires On the Internal Forces Of Tunnel Liningmentioning

confidence: 99%

Section: Impact Of Fires On the Internal Forces Of Tunnel Liningmentioning

confidence: 99%

A Simplified Way to Evaluate the Effect of Temperature on a Circular Tunnel

Dias

Anh

2021

Geotechnics

View full text Add to dashboard Cite

show abstract

“…According to the fuzzy analytic hierarchy process method, Wu et al [7] carried out a hydrodynamic scale-model test to investigate the effects of motion response on the safety of an immersed tunnel element during the immersion process. Guo et al [8] studied thermal stress and fire damage of an immersed tunnel structure and pointed out that having or lacking thermal insulation was crucial to tunnel structure. Xu et al [9] established the hierarchical structure of the health index and then put forward a modified evaluation model.…”

Section: Introductionmentioning

confidence: 99%

Seismic Behavior of Shear Keys Enhanced with Novel Energy Absorption Devices in Immersion Joints Based on Pseudo-Static Tests

Cheng

Jing

et al. 2022

Materials

View full text Add to dashboard Cite

Shear keys are usually installed as crucial shear-resistant members of an immersion joint; thus, the mechanical behavior of the shear keys, especially under earthquake loading, deserves more attention. This paper presents a novel arc-shaped energy absorption device developed for shear keys. In order to verify the seismic performance of shear keys strengthened by the arc-shaped energy absorption devices, a series of pseudo-static tests were conducted, in which different axial pressures (300 kN, 400 kN) were also taken into consideration. The testing results indicated that failure mode of the shear key enhanced by the energy absorption devices was a synthesis of the oblique shear failure of the rubber blankets, the buckling of the energy absorption devices, and the concrete fracture of the shear key. In view of load-displacement hysteretic curves of testing specimens, loops of the reinforced shear keys were plumper than those from a traditional shear key. In addition, the load-bearing capacity (cracking load, yield load, peak load, and failing load) differences of the shear keys with and without energy absorption devices reinforcement under the same axial pressure were 33.0%, 36.7%, 26.0%, and 23.6%, respectively. The maximum equivalent viscous coefficient values of the shear keys with and without energy absorption devices reinforcement were 0.37, 0.38, and 0.32, respectively. The arc-shaped energy absorption devices can contribute to the hysteretic behavior of the shear keys. However, the axial pressure had a positive influence on the load bearing capacity, accumulated energy absorption capacity, and initial stiffness of the shear keys. In contrast to that, the axial pressure had negative influence on ductility ratio of the reinforced shear keys (equivalent viscous coefficient values of two enhanced shear keys were roughly equal). A reasonable stiffness scheme of an energy absorption device should be given attention during the anti-seismic design of an immersion joint. The study can provide scientific support for further study on the seismic responses of immersion joints and promote the application of earthquake control technology in immersed tunnels.

show abstract

“…In underground engineering problems that are affected by high temperatures, existing achievements and studies focus on the supporting structure and laws of hightemperature stress of surrounding rock caused by fire and radioactive substances [1][2][3][4][5]. Studies on stress problems caused by high temperature differences are few, especially in hydraulic tunnels [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Study on Mechanical Properties of High Rock Temperature Diversion Tunnel

Yao

Wan

et al. 2019

Advances in Civil Engineering

View full text Add to dashboard Cite

e high temperature of rock used in different working conditions has a significant effect on the deformation characteristics and the mechanics of tunnel lining support structure. A test using a laboratory model is designed to study the quantitative relationship between the temperature difference and the support force. rough the laboratory model test, the strain and stress variation characteristics of the supporting structure of a water diversion tunnel under different surrounding rock temperatures and different water temperatures were simulated. e variation characteristics of the supporting structure under various working conditions, such as a different initial temperature field, different crossing water temperature of the diversion tunnel during runtime, and repairing period after the water is emptied, were analyzed. e relationship between the high-temperature difference between the inner and outer walls of the tunnel lining support structure and the internal temperature stress of the supporting structure was obtained and compared with the results from numerical experiments. e test results showed that a high circumferential tensile stress is created in the support structure of the high-temperature diversion tunnel due to the temperature difference between the inner and outer walls of the support structure caused by water going through the high-temperature diversion tunnel. e radial compressive stress increases by 45-50%, and the circumferential tensile stress increases by 40-60%. e results provide references for the design of the support structure in a high-temperature tunnel.

show abstract

Fire Thermal Stress and its Damage to Subsea Immersed Tunnel

Cited by 22 publications

References 4 publications

A Simplified Way to Evaluate the Effect of Temperature on a Circular Tunnel

A Simplified Way to Evaluate the Effect of Temperature on a Circular Tunnel

Seismic Behavior of Shear Keys Enhanced with Novel Energy Absorption Devices in Immersion Joints Based on Pseudo-Static Tests

Experimental and Analytical Study on Mechanical Properties of High Rock Temperature Diversion Tunnel

Contact Info

Product

Resources

About