Sotirios A Argyroudis

Sotirios A Argyroudis
Brunel University London · Department of Civil Engineering

PhD

About

121
Publications
40,065
Reads
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1,618
Citations
Introduction
18+ years of experience in hazard, vulnerability, risk and resilience assessment of urban systems and infrastructure exposed to earthquakes, floods, tsunamis and other natural hazards.
Additional affiliations
November 2020 - present
Brunel University London
Position
  • Professor (Assistant)
March 2020 - March 2021
University of Surrey
Position
  • Professor (Associate)
September 2017 - February 2020
University of Surrey
Position
  • Fellow
Description
  • TRANSRISK: Vulnerability and risk assessment of transport system of assets exposed to geo-hazards (EC H2020-MSCA 746298). Multi-hazard vulnerability and resilience assessment; Monitoring-enhanced resilience assessment of critical infrastructure

Publications

Publications (121)
Article
In this paper a numerical approach is proposed for the construction of fragility curves for shallow metro tunnels in alluvial deposits, when subjected to transversal seismic loading. The response of the tunnel is calculated under quasi static conditions applying the induced seismic ground deformations which are calculated through 1D equivalent line...
Article
This article presents an integrated approach for the probabilistic systemic risk analysis of a road network considering spatial seismic hazard with correlation of ground motion intensities, vulnerability of the network components, and the effect of interactions within the network, as well as, between roadway components and built environment to the...
Article
Full-text available
Recent natural disasters that seriously affected critical infrastructure (CI) with significant socio-economic losses and impact revealed the need for the development of reliable methodologies for vulnerability and risk assessment. In this paper, a risk-based multi-level stress test method that has been recently proposed, aimed at enhancing procedur...
Article
free access link: https://authors.elsevier.com/a/1aU8xB8cco90W The exposure of critical infrastructure to natural and human-induced hazards has severe consequences on world economies and societies. Therefore, resilience assessment of infrastructure assets to extreme events and sequences of diverse hazards is of paramount importance for maintaining...
Article
Full-text available
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...
Article
Transport infrastructure is the backbone of the economy and society, while at the same time is exposed to multiple hazards. Previous natural disasters, including earthquakes, had a significant impact on transport networks with severe consequences for the users and supply chain. In this context, the resilience assessment of critical assets such as t...
Article
Full-text available
Scour is the prevailing cause of bridge failure worldwide, leading not only to traffic disruption, but also to social and economic losses and even to casualties. Many vibration-based monitoring techniques have been proposed for identifying the scour location and extent, based on the evaluation of the changes of the bridge modal properties due to sc...
Article
Full-text available
The main aim of this article is to shed light on the establishment of more resilient road networks, which can operate and interact regularly with the surrounding complex-built environment systems during various natural hazards such as earthquakes. This study is integrating engineering judgment and numerical methods to create a comprehensive evaluat...
Article
Full-text available
Roadway systems and their assets are the backbone of the transport sector and are vital for social and economic prosperity. Hence, it is important to design and develop transportation networks that can withstand natural hazards such as earthquakes. In recent decades, research concerning disaster risk management for roadway systems has received a lo...
Conference Paper
Full-text available
Reliability of road systems and their critical components exposed to multiple natural hazards is on the frontline of engineering research during the last three decades since potential damage of infrastructure is strongly related to important direct and indirect economic losses. In this context, the research project INFRARES (www.infrares.gr) aims a...
Conference Paper
Full-text available
Tunnels and underground structures are constructed at an increasing rate in seismic prone areas to facilitate expanding transportation needs. The importance of these types of structures in modern societies, as well as the significant downtimes associated with seismically induced damage on them, led to an increasing interest of the scientific commun...
Conference Paper
Full-text available
The seismic vulnerability and risk assessment of infrastructure and utility systems are essential to prevent or mitigate sufficiently the negative consequences, implement resilience management strategies and recover efficiently after a major earthquake. In a complex urban environment, having multiple interacting and interdependent infrastructures b...
Article
Fragility functions are used in the vulnerability analysis of structures considering different sources of uncertainties. In this research, a framework to develop time-dependent fragility functions for circular tunnels embedded in soft soils is proposed considering the impact of corrosion on the lining reinforcement. Typical shallow and deep circula...
Article
Climate change, diverse geohazards and structural deterioration pose major challenges in planning, maintenance and emergency response for transport infrastructure operators. Hence, to manage these risks and adapt to changing conditions, well-informed resilience assessment and decision-making tools are required. These tools are commonly associated w...
Article
Full-text available
Delivering infrastructure, resilient to multiple natural hazards and climate change, is fundamental to continued economic prosperity and social coherence. This is a strategic priority of the United Nations Sustainable Development Goals (SDGs), the World Bank, the OECD, public policies and global initiatives. The operability and functionality of cri...
Article
Recent earthquakes have shown that tunnels are prone to damage, posing a major threat to safety and having major cascading and socioeconomic impacts. Therefore, reliable models are needed for the seismic fragility assessment of underground structures and the quantitative evaluation of expected losses. This paper builds on previous research and pres...
Article
Bridges are the most vulnerable assets of our transport networks. They are disproportionately exposed to and hit by multiple natural hazards, with flooding being the leading cause of bridge failures in the world. Their performance is constantly challenged by the combined effects of natural hazard stressors, e.g. flash floods, exacerbated by climate...
Article
This study aims to identify optimal intensity measures (IMs) for use in probabilistic seismic demand models (PSDMs) for circular tunnels in soft soil deposits. To this end, we performed an extended numerical parametric study involving two-dimensional time history analyses of selected soil-tunnel configurations to evaluate the response of the select...
Article
Full-text available
The purpose of this survey is to define the restoration tasks after hydraulic-induced damage and/or loss of functionality of bridges. This includes the duration and sequence of restoration tasks, idle times, cost, and traffic/functionality loss for specified damage levels of given bridge components. The potential use of this data is the generation...
Article
Building resilient bridges, capable of withstanding multiple natural stressors with minimal damage and quickly restore functionality is paramount to delivering climate-resilient transport infrastructure. Nevertheless, bridges are proven to be vulnerable to natural hazards, with flooding and earthquakes being the main causes of failure. The availabl...
Article
Understanding the resilience of transport networks is critical for efficient asset management. This paper takes an innovative approach to studying the operability of the Queensferry Crossing (QFC) including cost-benefit aspects. A key driver for the QFC was to increase the resilience of the A90/M90 link by reducing weather-related closures. The fir...
Method
Full-text available
The purpose of this survey is to define the restoration tasks after hydraulic-induced damages and/or loss of functionality of bridges in the framework of the ongoing research projects, which are available on http://www.infrastructuresilience.com/projects/, coordinated by the University of Surrey. The ultimate outcome of this survey will be the gene...
Article
Full-text available
Road networks are considered as one of the most important transport infrastructure systems , since they attain the economic and social prosperity of modern societies. For this reason, it is vital to improve the resiliency of road networks in order to function normally under daily stressors and recover quickly after natural disasters such as an eart...
Article
Full-text available
Purpose Transport infrastructure resilience is of paramount importance for societies, therefore its quantification is urgently needed. A resilience assessment framework based on well-informed resilience indices is presented and applied for assessing the resilience of representative bridges exposed to earthquakes. Design/methodology/approach The fr...
Article
Fragility functions express the probability that an asset exceeds some serviceability or limit state for a given level of environmental perturbation or other loadings, to which the asset is subjected. They are important components in the quantitative risk analysis of infrastructure exposed to natural hazards and they have typically been derived for...
Article
Monitoring-enhanced resilience in transport management is an emerging area which has not been fully explored. Digital technologies have the potential to provide rapid resilience assessments in a quantifiable and engineered manner for transport infrastructure, which is exposed to multiple natural and human-induced hazards and diverse loads throughou...
Conference Paper
Full-text available
The exposure of critical transport infrastructure to natural hazards and climate change effects has severe conse-quences on world economies and societies and, thus, safety and resiliency of transport networks are of para-mount importance. The currently available frameworks for quantitative risk and resilience-based design and as-sessment have been...
Article
This paper aims at the vulnerability assessment of circular tunnels in soft soil deposits of the metropolitan subway system of Shanghai, accounting for the effects of soil-structure-interaction, local soil conditions and tunnel burial depth. The study focuses on the seismic vulnerability in the transversal direction. A suite of twelve earthquake re...
Conference Paper
Full-text available
Transportation infrastructure is a pylon for the society and economy, enabling the services and transportation of goods and people, under normal and emergency circumstances. Bridges act as bottlenecks within road and rail networks, since bridges are crunch points along the network system. Their failures due to multiple natural hazards (e.g. floods,...
Conference Paper
Full-text available
Η παρούσα εργασία αποτελεί μια πρακτική εφαρμογή των κύριων βημάτων ανάλυσης και διαχείρισης της σεισμικής διακινδύνευσης πολεοδομικών ενοτήτων αποτελούμενων από κτίρια με κύρια χρήση την κατοικία. Η εφαρμογή πραγματοποιείται σε μια κεντρική περιοχή του πολεοδομικού συγκροτήματος της Θεσσαλονίκης και περιλαμβάνει 23 οικοδομικά τετράγωνα. Αρχικά, εκ...
Conference Paper
Full-text available
Transportation infrastructure is a pylon for the society and economy, enabling the services and transportation of goods, under normal and emergency circumstances. Bridgeworks act as bottlenecks within road and rail networks and their failures due to e.g. floods, cause disproportionate losses, which are expected to be exacerbated due to climate chan...
Conference Paper
Full-text available
Transport infrastructure resilience and risk assessment is typically based on the assessment of individual assets rather than the entire system. We introduce the concept of the infrastructure System of Assets (SoA), or ecosystem, referring to non-urban roads, illustrate the individual elements of the system, and the geotechnical and climatic hazard...
Conference Paper
This paper presents a numerical study to develop fragility curves for shallow tunnels in soft deposits of Shanghai, considering the effect of soil-structure-interaction and local soil conditions. For this purpose, a series of two-dimensional (2D) numerical models with typical soil-tunnel configurations of the metro network in Shanghai is initially...
Conference Paper
Full-text available
The exposure of critical infrastructure to natural hazards was proven to have severe consequences on world economies and societies. Therefore, resilience assessment of an infrastructure asset to extreme events and sequences of diverse hazards is of paramount importance for maintaining their functionality. However, the resilience assessment commonly...
Conference Paper
Full-text available
Diverse natural and manmade disasters are becoming more frequent inflicting severe consequences to the environment, societies, economies and critical infrastructure. Therefore, it is of paramount importance to sustain the functionality and operability of critical infrastructure during and after the hazard event, minimize the direct and indirect los...
Conference Paper
Full-text available
Transportation infrastructure resilience is of paramount importance for societies and economies, therefore its quantification is urgently needed. Infrastructure assets and networks should be robust, i.e. they should have the ability to absorb the actions of natural hazards with minimal loss of functionality and thus should be designed to have redun...
Article
An engineering risk-based methodology for stress testing critical infrastructures is introduced and applied to the port of Thessaloniki in Greece exposed to seismic, geotechnical and tsunami hazards. The methodology workflow consists of four phases: Pre-Assessment, Assessment, Decision and Report phase. In the pre-assessment phase, all the necessar...
Article
Full-text available
In this article, we propose a dynamic Boolean network‐type mathematical representation of networked critical infrastructures under stress. Our formulation is obtained as a threshold‐based approximation of a discrete‐time switched system meant to describe failure and recovery phases that may span considerably different time periods. The formalism ca...
Conference Paper
Full-text available
Hazard assessment and loss estimation analysis, benefit at the time being from a broad variety of modeling platforms and software tools helping to model the complex system and interactions between structure, infrastructure and multi-hazards. Those platforms are offered as open sources, semi-open or fully closed tools. The modules and associated ana...
Conference Paper
Full-text available
This paper presents a review of the different methodologies developed for the fragility assessment of critical transportation infrastructure subjected to geotechnical and climatic hazards with emphasis placed on geotechnical effects. Existing information on fragility analysis is synthesized, along with its parameters and limitations with particular...
Conference Paper
Full-text available
This paper provides a review of the different methodologies for the fragility assessment of critical transportation infrastructure subjected to earthquake excitations with emphasis placed on geotechnical effects. Available approaches to fragility analysis are summarized, along with the main parameters and limitations. Additionally, definitions of d...
Conference Paper
Full-text available
This paper provides a review of the different methodologies for the fragility assessment of critical transportation infrastructure subjected to earthquake excitations with emphasis placed on geotechnical effects. Available approaches to fragility analysis are summarized, along with the main parameters and limitations. Additionally, definitions of d...
Conference Paper
The aim of this paper is to develop a seismic risk assessment study of urban infrastructural systems relying on state-of-the-art tools for the prediction of earthquake ground motion as well as the assessment of vulnerability. The proposed approach makes use, on one hand, of 3D physics-based numerical simulations of source-to-site wave propagation p...
Conference Paper
Full-text available
In the context of the STREST project (http://www.strest-eu.org/), an engineering multi-level risk-based methodology to stress test critical non-nuclear infrastructures has been developed. This paper summarizes the STREST framework and its exploratory application to six key representative Critical Infrastructures in Europe, exposed to variant hazard...
Conference Paper
Urban Resilience has recently emerged as both a conceptual approach and directive agenda in the attempt to enhance the capabilities of cities to withstand and manage their environmental, economic or social pressures more effectively. As a result, resilience policies are increasingly being espoused by cities around the world as an instrument to deal...
Article
The paper presents a numerical approach for the construction of seismic fragility curves for shallow metro tunnels considering the soil-structure-interaction (SSI) and the aging effects due to corrosion of the lining reinforcement. The tunnel response under ground shaking is evaluated through 2D non-linear dynamic analyses, for increasing levels of...
Conference Paper
A new engineering risk based methodology for stress tests named ST@STREST developed in the context of the European project STREST (www.strest-eu.org) for non-nuclear critical infrastructures (CIs) is applied to the port of Thessaloniki in North Greece. This case study is a characteristic example of distributed and/or geographically extended infrast...
Article
Full-text available
Transportation infrastructures are complex systems of various connected components like bridges, roads, tunnels, embankments, retaining walls in case of a highway system or wharfs, cranes, buildings, utility systems in case of port facilities. Due to their spatial extent, they are exposed to variable natural hazards such as earthquakes, tsunami or...
Article
Full-text available
Reuse of the 1.5 billion waste tyres that are produced annually is a one of the major worldwide challenges, as waste tyres are toxic and cause pollution to the environment. In recognition of this problem, this paper introduces the reuse of tyres, in the form of derived aggregates in mixtures with granulated soil materials, as previous studies indic...
Article
Integral abutment bridges (IABs) are jointless structures without bearings or expansion joints which require minimum or zero maintenance. The barrier to the application of long-span integral abutment bridges is the interaction of the abutment with the backfill soil during the thermal expansion and contraction of the bridge deck, that is, serviceabi...
Article
One of the main focuses of disaster management is to decrease the impact of disasters by developing efficient emergency management plans and strategies. In this context, accessibility modeling of emergency related services such as health, fire, security services, or shelter sites in earthquake case can be a valuable tool for disaster managers, espe...
Article
Fragility curves constitute the cornerstone in seismic risk evaluations and performancebased earthquake engineering. They describe the probability of a structure to experience a certain damage level for a given earthquake intensity measure, providing a relationship between seismic hazard and vulnerability. In this paper a numerical approach is appl...
Poster
Full-text available
Critical infrastructures are the backbone of modern society and provide many essential goods and services to urban areas. Given the risks associated with the impact of natural hazards on critical infrastructures, the move towards safer and more resilient cities requires the development and application of an improved risk assessment framework to add...
Conference Paper
A sensitivity study of probabilistic systemic risk analysis of interconnected urban networks to spatially correlated seismic hazard intensities is presented. Probabilistic evaluation of the performance of networks is carried out by means of Monte Carlo simulations. In particular, a scalar random field of a so-called primary Intensity Measure (IM) o...
Conference Paper
Over the past years various industrial techniques for tyre recycling as well as applications of recycled tyres in civil engineering works have been developed. The prospected benefits are twofold: on the one hand environmental protection is achieved, since considerable quantities of waste tyres are stockpiled in landfills or abandoned in the nature...
Conference Paper
Full-text available
There is an urgent need for maintenance-free transportation infrastructures worldwide. Integral Abutment Bridges (IABs) are robust structures, without bearings or expansion joints that require zero or minimum maintenance. The challenge to the assessment of existing and the application of IABs is the dynamic interaction between the bridge and the ba...
Article
A fundamental tool in seismic risk assessment of transportation systems is the fragility curve, which describes the probability that a structure will reach or exceed a certain damage state for a given ground motion intensity. Fragility curves are usually represented by two-parameter (median and log-standard deviation) cumulative lognormal distribut...
Chapter
The experience of past earthquakes has revealed that highway and railway elements are quite vulnerable to earthquake shaking and induced phenomena such as soil liquefaction or landslide; damages to these elements can seriously af-fect the transportation of products and people in both short-term (emergency ac-tions) and long-term period. The objecti...
Conference Paper
Full-text available
Soil-structure interaction phenomena are significantly affecting the seismic behavior and vulnerability of tunnels in soft soils. The paper presents numerical fragility curves that are computed from dynamic time history analyses of representative circular tunnels-soil systems. The mechanical properties of the tunnel lining, the characteristics of t...