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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/42424

Title: Load-Carrying Capacity Service Life Prediction of Existing Reinforced Concrete Bridge Using Time-Dependent Reliability Analysis
Authors: Ming-Te Liang;Jiang-Jhy Chang;Han-Tung Chang;Chi-Jang Yeh
Contributors: 國立台灣海洋大學:河海工程學系
Keywords: Bridge;Corrosion;Load-carrying capacity;Reliability analysis;Service life prediction;Viaduct
Date: 2009
Issue Date: 2017-05-11T01:09:00Z
Publisher: Structural Longevity
Abstract: Abstract:Engineering experience has clearly shown that existing reinforced concrete (RC) bridges are reliable to damage from environmental attack such as freeze-thaw, alkali-silica reaction, and corrosion. To establish feasible and rational method, reliable prediction of the service life of deteriorating RC bridge is needed. To obtain an exact insight into this problem, time-dependent reliability methods have to be used. In this paper, the reliability of RC girder bridges under corrosion condition is studied using a time-dependent reliability analysis in which both load and resistance are time-dependent. The corrosion process has three stages, the initiation (diffusion or carbonation) time (ti = tc), the depassivation time (tp), and the propagation (corrosion) time (tcorr). The load-carrying capacity service lives of existing RC bridges or viaducts can be expressed as tt = tc + tp + tcorr Many mathematical models could be employed to calculate each value of tc, tp, and tcorr. The value of tt may be directly predicted from the relationship between reliability index and time. The existing Wann-fwu bridge and Chung-ching viaduct in Taipei were offered as illustrative examples for the modeling technique and load-carrying capacity service life prediction. The results of tt predicted from the relationship between reliability index and time were rationally compared with the results of tt calculated from the sum of tc,tp, and tcorr. The results of this study were provided as a decision making for repair, strengthening, and demolition of existing RC bridges or viaducts.
Relation: 2(2),pp.103-128
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/42424
Appears in Collections:[河海工程學系] 期刊論文

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