Vulnerability to failure of cable-stayed bridges for beyond-design basis wind events

Climate Change and Natural Hazard Risk Assessment Framework for Coastal Cable-Stayed Bridges

“…However, there is still plenty of work to do to arrive at robust methods that consider all aspects of a hurricane or flooding event. Especially for cablestayed bridges there are few studies available that investigate the effect of hurricanes which focus only on extreme wind speeds (Chen, 2015;Chen et al, 2017;Ovett et al, 2018). To provide a more integrated framework accounting for storm surge, wave height and wind speed for assessing vulnerability against hurricane hazard, two approaches are adopted to calculate the probability of failure of the bridge system considering wind, storm surge and wave height.…”

“…The second approach evaluates bridge vulnerability to extreme wind forces developed on the bridge during a hurricane event. Ovett et al (2018) proposed a method that pertains a simple but effective combination of static wind loading and dynamic wind effects to identify critical bridge elements and their vulnerability to failure. Bridge components and sections are evaluated for vertical (lift), horizontal (drag), and torsional (pitch) loading scenarios.…”

“…In some research studies the main goal is to assess seismic vulnerability and risk of cable-stayed bridges (Khan et al, 2004;Casciati et al, 2008;Khan and Datta, 2010;Akhoondzade and Bargi, 2016;Zhong et al, 2018). Ovett et al (2018) deal with wind as a single hazard and specifically with cable-stayed bridges' vulnerability to wind effects beyond design basis. Recently there have been studies toward the multi-hazard treatment of cable stayed bridges.…”

Análise mecânica e probabilística de estruturas treliçadas sujeitas ao colapso progressivo

“…Os conceitos de robustez e vulnerabilidade, como dito acima, não são exatamente complementares, como sugerido por Chen et al [107]. Alguns fatores de vulnerabilidade e importância propostos na literatura são deficientes, pois não levam em conta as consequências de falha [107,108,109]. Estudos de vulnerabilidade visando efeitos de tremores sísmicos [110] e redes de oleodutos [111] foram recentemente apresentados, mas esses estudos não apresentam nenhum índice geral de vulnerabilidade.…”

“…Com relação às análises não lineares dinâmicas plásticas, averiguou-se que a introdução do comportamento elastoplástico reduziu os deslocamentos das estruturas analisadas sob ação de sismo. 109 CAPÍTULO 6 MODELO PROBABILÍSTICO…”