Seismic fragility curves presenting some probability of failure or a damage state exceedance versus seismic intensity can be established by engineering judgment, empirical numerical approaches. This paper focuses on the latter issue. In recent studies, three popular methods based simulations, comprising scaled intensity, maximum likelihood estimation and probabilistic demand/capacity models, have been studied compared. The results obtained show that (MLE) method is in general better than...

Current level of morbidity generated by industrial air pollution requires effective tools combining pollutant rates and their risks on human health. Traditional Life Cycle Assessment (LCA) appears to be the most appropriate method for assessing impact toxicity inhalation. However, its interest is limited due lack spatial-temporal specificities emissions. To solve this problem, research work shows feasibility a site-dependent dynamic LCA, obtained coupling between traditional temporal spatial...

A seismic fragility curve of a structure or mechanical system, presenting its failure probability versus intensity, can be established by an engineering judgment approach, empirical approach numerical approach. In the there exist three popular methods: scaled intensity method, maximum likelihood estimation and probabilistic demand/capacity models. This paper is focused on comparison these methods. Linear/non-linear oscillators eight-storey frame were used to derive curves for different...

This article presents an improved procedure for detecting single damage in beam-like structures. Many detection methods are based on the analysis of beam natural frequency shifts damaged and intact states its analytical modal curvatures. They identify by constructing curves coefficients along visually determining point their mutual intersection. However, some cases, absence unambiguous intersection these or low accuracy localization makes it difficultto use methods. To accurately determine...

Capacitive micromachined ultrasonic transducers (CMUTs) are microelectromechanical systems used for the generation of ultrasounds. The fundamental element transducer is a clamped thin metallized membrane that vibrates under voltage variations. To control such oscillations and to optimize its dynamic response it necessary know modal parameters as resonance frequency, damping stiffness coefficients. purpose this work identify these using only time data obtained from center displacement....

The aim of this research is to optimize a methodology used in eco-design, that so-called Life Cycle Assessment (LCA), order increase its representativeness when evaluating systems. This optimization consists introducing temporal factors the environmental impact assessment. process called Dynamic (DLCA). It uses Enhanced Structural Path Analysis (ESPA) method combined with OpenLCA software and an algorithm written under MATLAB. Then, Inventory (LCI), carrying out inventory input output masses...

One of the main difficulties operational modal analysis is to deal with underdetermined problems in which number sensors less than active modes. In last decade, methods based on PARAllel FACtor (PARAFAC) decomposition have attracted a lot attention field because it has been proven that these can cases, as well presence harmonic excitations. Moreover, combination kurtosis value indicator, this makes them more efficient distinguishing between and structural components. However, lead distorted...

A seismic fragility curve that shows the probability of failure a structure in function intensity, for example peak ground acceleration (PGA), is powerful tool evaluation vulnerability structures nuclear engineering and civil engineering. The common assumption existing approaches cumulative log-normal function. In this paper, we propose new technique construction curves by numerical simulation using Probability Density Evolution Method (PDEM). From joint density between structural response...