Luis Martins

Allianz SE · Analytical Hub

Strong seismic events frequently strike Chile. The last three significant events that caused considerable damage and losses are the 2010 (Mw\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt...

The global building exposure model is a mosaic of local and regional models with information regarding the residential, commercial, and industrial building stock at the smallest available administrative division of each country and includes details about the number of buildings, number of occupants, vulnerability characteristics, average built-up a...

Canada is exposed to rare but potentially destructive earthquakes that threaten densely settled metropolitan centers in many parts of the country. To assess the impacts and consequences of future natural-hazard events and help advance policy goals and objectives of the Sendai Framework for Disaster Risk Reduction, Natural Resources Canada, through...

The early identification of areas of high seismic risk remains one of the most important tools for the design and implementation of risk mitigation strategies. Current seismic risk assessment measures predominantly rely on having separated models for seismic hazard, exposure and vulnerability, which are then combined following a probabilistic or ev...

A new European Seismic Risk Model (ESRM20) was recently released to the scientific community (http://risk.efehr.org). This model combines the European Seismic Hazard Model (ESHM20), a regional model of site response based on proxy data (topography and geology), an exposure model describing the distribution of building classes for 44 countries, and...

Factors such as the increase in the global population, economic growth, climate change, and aging infrastructure are contributing to the increase in the impact caused by earthquakes. Despite the overwhelming evidence of the dynamic nature of earthquake risk, current disaster risk management is mostly informed by static risk information. Consequentl...

Seismic fragility and vulnerability assessment is an essential step in the evaluation of probabilistic seismic risk. Ideally, models developed and calibrated for the building portfolio of interest would be readily available. However, the lack of damage data and insufficient analytical studies lead to a paucity of fragility and vulnerability models,...

Vulnerability functions describe the expected loss for a given ground shaking intensity level and are an essential component in probabilistic seismic risk assessment. This manuscript presents a novel open-source platform for the derivation of analytical fragility and vulnerability models, covering state-of-the-art methodologies, and addressing crit...

The last seismic risk maps developed for Italy (Dolce et al. 2020) are still affected by the shortcoming of not including site geological effects, limiting the assessment to the rock type of soil that might lead to unconservative results in the estimated losses. In this work, for the quantification of site effects, we used the results obtained by M...

Simplified relationships to compute the period of vibration are valuable to estimate seismic loads during the design process of new structures, in the assessment of the structural vulnerability of existing buildings, or in the estimation of earthquake losses of large portfolios of assets. Nonetheless, these are frequently region specific and with l...

The relation between the response of an elastic single degree of freedom oscillator subject to seismic shaking and the seismological characteristics of the input waveforms represented in terms of the Fourier amplitude spectrum (FAS) has become a topic of growing interest in the engineering seismological community in recent years. As simulations of...

Vulnerability functions describe the expected loss for a given ground shaking intensity level and are an essential component in probabilistic seismic risk assessment. This manuscript presents a novel open-source platform for the derivation of analytical fragility and vulnerability models, covering state-of-the-art methodologies, and addressing crit...

A European seismic risk model will be released in 2020 as an output of the European Horizon 2020 SERA project (www.sera-eu.org), building also upon the research efforts of many previous projects (e.g. LESSLOSS, SYNER-G, NERA, SHARE). The main risk metrics that will be released with the model include national and sub-national maps of average annual...

Since 2015, the Global Earthquake Model (GEM) Foundation and its partners have been supporting regional programs and bilateral collaborations to develop an open global earthquake risk model. These efforts led to the development of a repository of probabilistic seismic hazard models, a global exposure dataset comprising structural and occupancy info...

This study describes the development of the various components of the European Seismic Risk Model 2020 (ESRM2020) which will be able to generate, using open-source software developed by the GEM Foundation (the

An adequate characterization of seismic fragility is an essential step in assessing seismic risk for a given region. Ideally models developed and calibrated for a country's building portfolio would be readily available. However, a review on existing literature reveals a significantly different scenario, with reliable fragility data still being scar...

Fragility functions that are available for a number of reinforced concrete building types designed to Eurocode 8 (EC8) under different levels of PGA have been used herein to identify the design PGA values that would need to be mapped across a given case study region to ensure uniform acceptable levels of individual risk, for the purposes of seismic...

The evaluation of the damage and impact after disastrous events offers a unique learning opportunity to improve existing earthquake risk reduction measures, or to implement new strategies. Damage observations and building surveys after the 2015 M7.8 Gorkha earthquake have revealed structural deficiencies in low-rise reinforced concrete buildings wi...

The assessment of earthquake loss often requires the definition of a relation between a measure of damage and a quantity of loss, usually achieved through the employment of a damage-to-loss model. These models are frequently characterized by a large variability, which inevitably increases the uncertainty in the vulnerability assessment and earthqua...

This paper analyzes the structural fragility of buildings designed according to the European regulation, in order to identify key aspects that impact risk-targeted hazard assessment. The performance of new buildings is assessed through 3D finite element models and non-linear dynamic analysis. These results were used to compute fragility functions f...

This study is part of an ongoing research on the development of damage-to-loss functions for Portuguese reinforced concrete buildings. This paper presents a complete vulnerability analysis of a real concrete moment frame building. Only analytical methods for vulnerability analysis were considered and the structural performance was assessed through...

In recent years Performance-based Earthquake Engineering (PBEE) techniques have been gaining significance as an alternative to existing deterministic assessment procedures. Briefly, on the basis of an extensive probabilistic framework, PBEE intends to provide information to various stakeholders in terms of monetary losses, downtime and/or casualtie...

Due to its transparency today's architectures often rely on glazed façade solutions to execute the building envelope. During a seismic event, glass breakage and fall out can occur and threaten occupants and passers. So in earthquake prone regions this must be accounted in the design project; however, there is little research on the behaviour of gla...