Weitao Yin , Canhui Zhao , Wei Kang , Hao Lu , Kailai Deng , Quanchuang Yuan , Jiahong Duan
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引用次数: 0
Abstract
Currently, the evaluation of the seismic resilience of bridges is a research hotspot. The empirical quantitative relationship between structural damage and traffic functionality loss has unclear mechanical significance. Traditional functionality recovery functions face difficulty in considering the contribution and repair order of components. This study used the vehicle speed as a quantitative indicator of traffic functionality. The girder track model (GTM) analysis method is proposed, and track irregularity (TI) is used as a track damage indicator, serving as the link between structural damage and traffic functionality loss. Moreover, the traffic functionality loss can be calculated based on speed loss, and two types of functionality recovery curves are proposed with consideration to the order of component repair and the variable weight coefficient. Three seismic resilience levels are proposed, namely, normal speed passage, speed-restricted passage, and closed passage. A method for evaluating the seismic resilience of railway bridges has been established. A five-span simply supported girder bridge was subjected to nonlinear analysis to validate the feasibility of the proposed method. The results reveal that the damages of bearings and piers have priority over track damage, but the damage evolution speed of the track structures is the fastest. The component weight coefficients of functionality recovery changed significantly as the seismic intensity increased. The recommended evaluation thresholds for the three seismic resilience levels of traffic functionality are 0.81 and 0.40.
期刊介绍:
Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed.
The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering.
Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels.
Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.