A5044876331- Seismic Performance and Analysis
- Masonry and Concrete Structural Analysis
- Structural Behavior of Reinforced Concrete
- Structural Health Monitoring Techniques
- Structural Response to Dynamic Loads
- Disaster Management and Resilience
- Infrastructure Resilience and Vulnerability Analysis
- Wind and Air Flow Studies
- earthquake and tectonic studies
- Flood Risk Assessment and Management
- Earthquake and Tsunami Effects
- Structural Engineering and Vibration Analysis
- Infrastructure Maintenance and Monitoring
- Urban Transport and Accessibility
- Probabilistic and Robust Engineering Design
- Concrete Corrosion and Durability
- Seismic and Structural Analysis of Tall Buildings
- Structural Load-Bearing Analysis
- Agricultural risk and resilience
- Civil and Structural Engineering Research
- Financial Literacy, Pension, Retirement Analysis
- Occupational Health and Safety Research
- Tropical and Extratropical Cyclones Research
- Sustainable Building Design and Assessment
- Vibration and Dynamic Analysis
University College London
2019-2025
Systemic Risk Centre
2019-2024
Marie Curie
2021
University of Pavia
2020
Istituti di Ricovero e Cura a Carattere Scientifico
2020
Polytechnic University of Bari
2015-2018
University of Canterbury
2017
Abstract. Regional seismic risk assessment is paramount in earthquake-prone areas, for instance, to define and implement prioritisation schemes earthquake reduction. As part of the Indonesia School Programme Increase Resilience (INSPIRE), this paper proposes an ad hoc rapid-visual-survey form, allowing one (1) calculate newly proposed INSPIRE index, which empirical proxy relative reinforced concrete (RC) buildings within a given building portfolio; (2) Papathoma Tsunami Vulnerability...
Abstract On the 26th of November 2019, an earthquake moment magnitude 6.4 struck northwest region Albania as result thrust faulting near convergent boundary Africa and Eurasia plates causing widespread damage to buildings in city Durrës surrounding areas. Based on official data from national authorities, caused 51 casualties 985 million-euro losses, corresponding 7.5% 2018 gross domestic product. This paper summarises field observations made by Earthquake Engineering Field Investigation Team...
In this Special Issue introductory paper, we present the Tomorrow's Cities Decision Support Environment (TCDSE). As negative impacts of natural hazards continue to escalate around world due increasing populations, climate change, and rapid urbanisation (among other factors processes), there is an urgent requirement develop structured operational approaches towards multi-hazard risk-informed decision making on urban planning design. This a particularly pressing issue for low-to-middle income...
This study focuses on scoring, selecting, and developing physical fragility (i.e., the probability of reaching or exceeding a certain damage state given specific hazard intensity) and/or vulnerability impact - consequence models for assets interest, with particular emphasis buildings. Given set multiple relevant hazards selected case-study region, proposed procedure involves 1) mapping asset classes construction types occupancy) in region to existing candidate fragility, damage-to-impact...
Probabilistic life-cycle consequence (LCCon) analysis (e.g., assessment of repair costs, downtime, or casualties over an asset's service life) can enable optimal management critical assets under uncertainties. This lead to effective risk-informed decision-making for future disaster (i.e., risk mitigation and/or resilience-enhancing strategies/policies). Nevertheless, despite recent advances in understanding, modeling, and quantifying multiple-hazard (or multi-hazard) interactions, most...
Abstract This study investigates the effects of ground-motion sequences on fragility and vulnerability reinforced concrete (RC) moment-resisting frames (MRFs). Two four-storey, four-bay RC MRFs are selected as case studies. These structures, which share same geometry, representative distinct classes in Mediterranean region characterized by different material properties, cross-section dimensions, detailing. The first is a ductile MRF designed according to Eurocode 8 (i.e., special-code...
This study deals with selecting optimal seismic retrofit solutions for reinforced concrete (RC) buildings. To this aim, multi-criteria decision-making (MCDM) is implemented explicitly considering earthquake-induced economic loss as a decision criterion. Fragility (i.e. likelihood of damage levels vs intensity measure ( IM) levels) and vulnerability IM relationships are derived by using three increasingly refined analysis methods: Simple Lateral Mechanism Analysis; numerical pushover;...
Abstract A framework to derive state‐dependent fragility relationships of structures subjected ground‐motion sequences (e.g. mainshock‐aftershock (MS‐AS) or triggered earthquakes) is proposed. The hysteretic energy dissipated in the sequence adopted as main demand parameter, it a cumulative measure monotonically increasing with length excitation. For structure earthquake‐induced ground motions, not possible define closed‐form representation function peak deformation. However, based on...
Seismic risk management of building portfolios requires a reliable evaluation earthquake-induced losses. This is commonly performed using consequence models linking structure-specific damage states (DSs) experienced by to given loss metric (or decision variable). study demonstrates simulation-based procedure that derives refined probabilistic considering two essential metrics: direct-loss and repair-time ratios (repair cost or time normalised the corresponding reconstruction values). Nine...
Abstract. In the context of natural hazard risk quantification and modeling interactions, some literature separates “Level I” (or occurrence) interactions from II” consequence) interactions. The Level I occur inherently due to nature hazards, independently presence physical assets. such cases, one event triggers or modifies occurrence another (e.g., flooding heavy rain, liquefaction landslides triggered by an earthquake), thus creating a dependency between features characterizing events....
The simple lateral mechanism analysis (SLaMA) is an analytical method to assess the force–displacement capacity curve of Reinforced Concrete (RC) structures composed frames, cantilever walls or dual wall/frame systems. current version was proposed in 2017 New Zealand guidelines for seismic assessment (NZSEE Society Earthquake Engineering, existing buildings—technical engineering assessments, Wellington, 2017). Regarding frame structures, possible influence infill currently considered locally...
Abstract This paper presents a procedure to design reinforced concrete (RC) buildings achieve an acceptable target level of earthquake‐induced loss (e.g., deaths, dollars, downtime) under site‐specific hazard profile. The is called “direct” since the specified at first step process, and virtually no iteration required. based on simplified assessment involving surrogate model for seismic demand (i.e., probability distribution peak horizontal deformation given ground‐motion intensity) models...
The 2017 New Zealand Society for Earthquake Engineering (NZSEE) guidelines seismic assessment of buildings recommends using Simple Lateral Mechanism Analysis (SLaMA) before implementing numerical analyses. method and the NZSEE have been enhanced from 2006 version, resulting into an efficient procedure, balancing simplicity accuracy.This paper presents a study, initiated as part development SLaMA-2017 method, to investigate accuracy analytical approach via comparison with 2D-pushover on 40 RC...
Abstract This paper proposes surrogate models (or metamodels) mapping the parameters controlling dynamic behaviour of inelastic single‐degree‐of‐freedom (SDoF) systems (i.e., force‐displacement capacity curve, hysteretic behaviour) and their probabilistic seismic demand model (PSDM, i.e., conditional distribution an engineering parameter [EDP] given a ground‐motion intensity measure [IM]). These metamodels allow rapid derivation fragility curves SDoF representation structures. Gaussian...
This study proposes a practical fragility-oriented approach for the seismic retrofit design of case-study structures. relies on mapping increase global displacement-based ratio capacity to life-safety demand ( CDR LS ) building-level fragility reduction. Specifically, due retrofitting is correlated with corresponding shift in median values multiple structure-specific damage states, observing that pseudo-linear trend appropriate under certain conditions. Accordingly, proposed fit such...
This study’s Part I proved that ground-motion duration could play an important role when assessing the nonlinear structural performance of case-study inelastic single degree-of-freedom systems. However, quantifying effects in many practical/more realistic engineering applications is not trivial, given difficulties decoupling from other characteristics. II, introduced this article, explores impact on by numerically simulating response reinforced concrete bare and infilled building frames....
The transport infrastructure was majorly affected by the 14th November 2016 Kaikōura Earthquake. Severe vertical and horizontal peak ground accelerations generated high inertial forces, land-slides, liquefaction. Most of bridges in Hurunui, Malborough districts were critical nodes to railway road networks. In total, 904 across those affected. Two reached life safety limit state, suffering severe damage, however, most experienced only minor moderate damage. This paper describes structural...
The concept of disaster risk is cross-disciplinary by nature and reducing has become interest for various disciplines. Yet, moving from a collection multiple disciplinary perspectives to integrated interdisciplinary approaches remains fundamental challenge. This paper reflects on the experience group early-career researchers spanning physical scientists, engineers social scientists different organisations across global North South who came together lead refinement, operationalisation testing...
An innovative method of estimating the relative risk buildings exposed to seismic and tsunami hazards in volcanic islands is applied Stromboli (Italy), a well-known stratovolcano affected by moderate earthquakes mass-flow-induced tsunamis. The uses pre-existing quali-quantitative analysis assess indices buildings, which provide comparative results useful for prioritisation purposes, combination with historical-geographical settlement consistent 'territorialist' approach urban regional...
In current seismic performance-based assessment approaches, nonlinear dynamic analysis of structures generally relies on ground motions selected based their pseudo-spectral accelerations, with little or no consideration for ground-motion duration. Part I this study, presented in article, attempts to comprehensively quantify the impact duration structural performance case-study inelastic single-degree-of-freedom systems shallow-crustal seismicity conditions. The effect is decoupled from that...
Abstract This paper proposes a procedure to design low‐rise base‐isolated structures achieving specific target level of earthquake‐induced loss (e.g., dollars, downtime) while complying with predefined minimum structural reliability. The is “direct” since the specified at first step process, and virtually no iterations are required. Direct loss‐based (DLBD) enabled by simplified assessment module involving: (1) surrogate probabilistic seismic demand models representing probability...