Performance-based design of road tunnel fire safety: Proposal of new Swedish framework

Gehandler, Jonatan; Ingason, Haukur; Lönnermark, Anders; Frantzich, Håkan; Strömgren, Michael

doi:10.1016/j.csfs.2014.01.002

Cited by 21 publications

(8 citation statements)

References 12 publications

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“…Performance-based design offers a good starting point with a complete set of basic goals, objectives and functions of the tunnel system, e.g. (Gehandler et al 2014b), but authorities and engineers need to make the best out of the new freedom offered by performancebased design. Several examples in this review show that better solutions or safer design does not come for free.…”

Section: Discussionmentioning

confidence: 99%

“…A more performance-based alternative to the standardised fires is to develop a unique time-temperature curve given actual fire load and conditions, see for example the Natural fire safety concept (Sleich et al 2002). An attempt to develop a similar concept for performance-based tunnel design can be found in (Gehandler et al 2014b). …”

Section: Structural Behaviourmentioning

confidence: 99%

“…An acceptable design should fulfil the agreed loss objectives and performance criteria (ISO 2009c;Meacham and Custer 1995;ISO 2012b;PIARC 2007). Gehandler et al (2013Gehandler et al ( , 2014b have developed a performance-based design guide for road tunnel fire safety.…”

Section: Fire Safety Engineering and Performance-based Designmentioning

confidence: 99%

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Road tunnel fire safety and risk: a review

Gehandler

2015

Fire Sci Rev

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A review concerning road tunnel fire safety and risk is presented. In particular different perspectives and methods on safety and risk are discussed. Road tunnel fire safety usually involves high uncertainty and high-stakes decisions. Thus, a wider group of stakeholders and different types of knowledge should be included in the fire safety analysis and evaluation, than what is required by technical risk analyses. It is argued that the decision process should not be separated from the design and safety evaluation as they are strongly dependent and iterative processes. Decision theory can guide the design and decision process in negotiation with stakeholders. Key parameters for the decision can be analysed through a combination of functional requirements, societal and political values, safety engineering, safety factors and systems theory. By taking an organisational viewpoint, potential latent and active errors can be analysed and a good safety culture can be engineered. In order to improve the safety culture of truck companies, regulation ensuring proper maintenance, training and quality management may be necessary in a competitive global economy.

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Section: Discussionmentioning

confidence: 99%

Section: Structural Behaviourmentioning

confidence: 99%

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Road tunnel fire safety and risk: a review

Gehandler

2015

Fire Sci Rev

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“…Performance-based fire design of tunnels should focus on quantifying the damage, downtime, and the corresponding losses. An initial framework can be adapted from other fields and applications; however, several factors, from fire scenario to structural behavior, and incorporation of potential solutions such as fixed firefighting systems, need to be carefully investigated in the analyses ( 46 ). The criteria for damage classes, acceptable thresholds for design, and performance objectives should be discussed and established with stakeholders.…”

Section: Knowledge Gaps and Directions For Future Researchmentioning

confidence: 99%

Review of Tunnel Fire Damage Assessment Methods and Techniques

Hua

Khorasani

Tessari

2021

Transportation Research Record

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Major tunnel fires can have catastrophic consequences, including loss of life, property damage, and long-term service disruptions. The rapid rise of gas temperature in excess of 1,000°C (1,832°F) inside a confined tunnel space as well as long fire duration because of limited emergency responder access necessitate special design considerations when evaluating the structural response to fire. Although tunnel stability is not challenged in most cases, severe damage to the concrete lining is observed after major fire events. This paper provides a detailed review of assessment methodologies and techniques of fire damage in concrete tunnel linings, including guidance on the determination of fire scenarios, concrete spalling, and tunnel safety from existing codes and guidelines, experiments, and numerical models. Based on the review, the need to develop relevant guidelines is emphasized, the knowledge gaps in the existing research are identified, and future research directions are proposed.

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“…Such load-bearing capacity will depend on the type of fibers used, but certainly it will contribute to reducing the risk of a tunnel collapse. This aspect is particularly relevant considering the high costs associated to the reconstruction or repairing of a collapsed tunnel [9,10] and the historic sequence of catastrophic events occurred in such structures submitted to fire loading [9]. Table 1 presents relevant data of previous studies on the effects of high temperature on FRC, including the used type of fiber, the temperatures reached and the tests performed.…”

Section: Introductionmentioning

confidence: 99%

Study of temperature effect on macro-synthetic fiber reinforced concretes by means of Barcelona tests: An approach focused on tunnels assessment

Rambo

Blanco

Figueiredo

et al. 2018

Construction and Building Materials

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This paper presents an experimental investigation on the applicability of the Barcelona (BCN) test to evaluate the mechanical properties of a Macro-Synthetic Fiber Reinforced Concrete (MSFRC) submitted to high temperature environments (up to 600°C). BCN tests demonstrated that the MSFRC gradually loses tensile strength an energy consumption density with increasing temperature. Temperatures of 400°C and 570°C shown to be critical to the MSFRC mechanical performance. The residual mechanical behavior of the macro-synthetic fibers was not affected by the temperature up to 100°C. For higher temperatures, the reinforcement showed that may lose part of its crystallinity compromising the MSFRC post-cracking performance. The constitutive model used to determine the stress-strain curves of the MSFRC was capable to reproduce the composite behavior after the event of a fire.

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Performance-based design of road tunnel fire safety: Proposal of new Swedish framework

Cited by 21 publications

References 12 publications

Road tunnel fire safety and risk: a review

Road tunnel fire safety and risk: a review

Review of Tunnel Fire Damage Assessment Methods and Techniques

Study of temperature effect on macro-synthetic fiber reinforced concretes by means of Barcelona tests: An approach focused on tunnels assessment

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