Experimental evaluation of vulnerability for urban segmental tunnels subjected to normal surface faulting

Kiani, Majid; Ghalandarzadeh, Abbas; Akhlaghi, Tohid; Ahmadi, Mohammad Hadi

doi:10.1016/j.soildyn.2016.07.012

Cited by 48 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition to a few empirical fragility curves (ALA, 2001;NIBS, 2004), a limited number of numerical fragility curves for circular bored tunnels are currently available in the literature, generally derived for different ground conditions and tunnel linings (Salmon et al, 2003;Argyroudis & Pitilakis, 2012;Andreotti & Lai, 2014, Kiani et al, 2016Argyroudis et al, 2017;Fabozzi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Seismic vulnerability of circular tunnels in sand

et al. 2021

View full text Add to dashboard Cite

The paper is focused on the assessment of seismic fragility curves for circular tunnels under moderate to severe earthquakes with the aim of improving the reliability of the risk assessment of underground infrastructural networks. Non-linear two-dimensional dynamic analyses were performed on different tunnel and soil configurations by using the finite-difference method implemented in Flac2D software. The applied input motions were selected considering their amplitude and frequency content variability. The response accelerations and predominant frequencies computed at ground level, above the tunnel, were compared with the corresponding free-field results to distinguish the effects attributable to the tunnel presence from those due to the site amplification. Tunnel safety was assessed through fragility curves, taking into account the dependence of tunnel lining bending resistance on the axial force variation during the earthquake. The more effective intensity measure was investigated correlating the tunnel performance to peak ground accelerations and peak ground velocities computed at the ground level and at the bedrock depth, respectively. The resulting fragility curves showed a satisfying matching with the empirical ones, generated on the basis of the observed seismic damage on tunnels.

show abstract

Section: Introductionmentioning

confidence: 99%

Seismic vulnerability of circular tunnels in sand

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Many existing studies on seismic performance-based assessment of tunnels or underground cavities (Salmon et al, 2003;Argyroudis & Pitilakis, 2012;Andreotti & Lai, 2014;Pitilakis et al, 2014;Kiani et al, 2016;Argyroudis et al, 2017;Fabozzi et al, 2017;de Silva & Scotto di Santolo, 2018) were aimed to individuate the damage under specific earthquake scenarios or the fragility of the system under weak to strong earthquakes. One of the most recent developments of performance-based earthquake engineering is the expression of the failure annual rate, obtained from the convolution of the fragility of the system under investigation and the seismic hazard on site.…”

Section: Introductionmentioning

confidence: 99%

Site Specific Seismic Performance of Circular Tunnels in Dry Sand

Silva¹,

Fabozzi²,

Nikitas³

et al. 2019

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Past earthquakes revealed that underground tunnel structures are exposed to seismic risk and their seismic vulnerability is mainly function of the tunnel structure technology, the soil-tunnel interaction developing during the seismic shaking and the intensity of the seismic event. Each of these factors play an important role in terms of the probability of damage and loss of functionality due to the tunnel deformations induced by increments in internal forces. Currently, the fragility curves are among the most widespread methods for the rapid assessment of structural performance at different hazard levels, giving the probability of reaching a defined damage level with respect to a given level of seismic motion. In the present work, a recently developed approach to evaluate the seismic risk has been applied to circular tunnels, whereby the main focus is the expression of the failure annual rate through the convolution of the fragility of the system under investigation and the seismic hazard on site. In this way, a direct link between the performance of the structure with its measuring parameter is established. The procedure has been adopted for some reference tunnel sections of the Metro Line of Naples.

show abstract

“…strength of soil or rock mass, and ground motion characteristics (use of a range of input motions), which are not captured in the empirical or expert-based models. More recently, the effect of corrosion of the lining has been studied by Argyroudis et al (2017), whilst Kiani et al (2016) proposed experimental fragility functions for circular tunnels as a function of fault rupture.…”

Section: Tunnelsmentioning

confidence: 99%

Fragility of transport assets exposed to multiple hazards: State-of-the-art review toward infrastructural resilience

Argyroudis

Mitoulis

Winter

et al. 2019

Reliability Engineering & System Safety

176

View full text Add to dashboard Cite

Vulnerability is a fundamental component of risk and its understanding is important for characterising the reliability of infrastructure assets and systems and for mitigating risks. The vulnerability analysis of infrastructure exposed to natural hazards has become a key area of research due to the critical role that infrastructure plays for society and this topic has been the subject of significant advances from new data and insights following recent disasters. Transport systems, in particular, are highly vulnerable to natural hazards, and the physical damage of transport assets may cause significant disruption and socioeconomic impact. More importantly, infrastructure assets comprise Systems of Assets (SoA), i.e. a combination of interdependent assets exposed not to one, but to multiple hazards, depending on the environment within which these reside. Thus, it is of paramount importance for their reliability and safety to enable fragility analysis of SoA subjected to a sequence of hazards. In this context, and after understanding the absence of a relevant study, the aim of this paper is to review the recent advances on fragility assessment of critical transport infrastructure subject to diverse geotechnical and climatic hazards. The effects of these hazards on the main transport assets are summarised and common damage modes are described. Frequently in practice, individual fragility functions for each transport asset are employed as part of a quantitative risk analysis (QRA) of the infrastructure. A comprehensive review of the available fragility functions is provided for different hazards. Engineering advances in the development of numerical fragility functions for individual assets are discussed including soilstructure interaction, deterioration, and multiple hazard effects. The concept of SoA in diverse ecosystems is introduced, where infrastructure is classified based on (i) the road capacity and speed limits and (ii) the geomorphological and topographical conditions. A methodological framework for the development of numerical fragility functions of SoA under multiple hazards is proposed and demonstrated. The paper concludes by detailing the opportunities for future developments in the fragility analysis of transport SoA under multiple hazards, which is of paramount importance in decision-making processes around adaptation, mitigation, and recovery planning in respect of geotechnical and climatic hazards.

show abstract

Experimental evaluation of vulnerability for urban segmental tunnels subjected to normal surface faulting

Cited by 48 publications

References 13 publications

Seismic vulnerability of circular tunnels in sand

Seismic vulnerability of circular tunnels in sand

Site Specific Seismic Performance of Circular Tunnels in Dry Sand

Fragility of transport assets exposed to multiple hazards: State-of-the-art review toward infrastructural resilience

Contact Info

Product

Resources

About