Thermal behaviour of unloaded concrete tunnel lining through an innovative large-scale tunnel fire experimental testing setup

Thermo-mechanical analysis of fire effects on the structural performance of shield tunnels

“…Fire is an important subject for a wide range of design, operation and maintenance processes of tunnels. Many historical fire incidents have confirmed that, while tunnel fires may not necessarily cause the collapse of a tunnel structure, significant damage can occur to the tunnel lining, and such damage in turn can result in long-term disruption to traffic or rail services leading to major economic losses (Carvel, 2019;Casse and Caroly, 2019;Hua et al, 2021;Ren et al, 2019;Zhang et al, 2021a;b). For instance, in 2001 two trucks crashed and this triggered a fire and induced serious structural damage at the Gotthard Road Tunnel in Switzerland (Chen et al, 2013).…”

“…Ring et al (2014) carried out fire tests and numerical analysis on concrete frame structures simulating tunnel structures and described the temperature field distribution across the sections of the structural members, the deformation at different positions and the concrete bursting. Alhawat et al (2021) conducted large-scale fire exposure testing of two unloaded tunnel rings in the RABT fire curve.…”

Evaluation Residual Compressive Strength of Tunnel Lining Concrete Structure after Fire Damage Based on Ultrasonic Pulse Velocity and Shear-Wave Tomography

“…A combination of influencing factors were evaluated using static loading tests to evaluate that fire damage imparted to the tunnel linings [11]. The thermal and spalling behaviours of fire-resistant concrete tunnel lining segments were analyzed [12]. Above studies were dependent on the mechanical compression test of the samples or the drilling core taking place on-site.…”

“…Ultrasonic pulse velocity (UPV) is a typical nondestructive testing (NDT) method that is dependent on the concrete's elastic properties and the density of the concrete. UPV was developed to reveal the tunnel lining structure of fire damaged concrete [12]. The propagation velocity of longitudinal and transverse ultrasonic waves is related to the degree of degradation in the concrete's compressive strength after a fire [14][15][16].…”

Artan Sicaklik Etki̇si̇ndeki̇ Betonarme Tünel Segmanlarinin Sem İle Sayisal Olarak İncelenmesi̇

“…There are limited numbers of works where the full-scale tunnel linings are tested under the combined effects of the structural load and fire by considering the actual boundary conditions and the conditioning which correspond to design assumptions (Guerrieri et al, 2020;Siemon and J. Zehfuß, 2017;Richter, 2005;Kaundinya, Dehn, Nause and Juknat, 2009;Boxheimer, Knitl and Dehn, 2009). Alhawat, Hamid, Baharom, Azmi, and Kaish (2021) studied the fire performance of the unloaded tunnel rings with different mixed designs through extensive full-scale tests. Numerical studies related to the behavior of RC structural elements exposed the fire have been also presented in the literature (Gao, Dai, Teng and Chen, 2013;Hajiloo and Green, 2018;Pagani, Bocciarelli, Carvelli and Pisani (2014); Dai, Gao and Teng, 2015).…”