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Damage Evaluation of Reinforced Concrete Bridge Subjected to Blast Loading
Subversive blasts and accidental explosions throughout the globe seek increased attention toward blast-resistant design of structures. Bridges being one of the most important structures pertaining to role in emergency response and economy of the nation crave for the increased attention of structural engineers when it comes to the blast-resistant design of bridges. In this study, a finite element analysis has been conducted using ABAQUS/CAE-2017, to investigate the effect of the location of the explosive charge on the dynamic response of a single-span reinforced concrete (RC) bridge deck supported on three symmetrically placed RC girders subjected to blast loading. Blast pressure profiles have been modeled using the published empirical relationships for two scaled distances. Four different locations of the explosive charge along the mid-span section of the girder, such as blast on the central girder above the deck, blast between two adjacent girders above the deck, blast on the overhang portion above the deck, and one below the middle girder, have been considered. The high explosive charge of weight 1000 kg (TNT) at standoff distances of 0.5 and 1.0 m has been considered. Crack pattern has been observed. Percentage concrete damages have been evaluated using damage evaluation and element removal technique, a provision available in ABAQUS software. Concrete damage plasticity (CDP) model has been used for modeling concrete elements. The maximum displacements obtained have been compared with the provisions of AASHTO: LRFD Bridge Design Specifications (2014).
Damage Evaluation of Reinforced Concrete Bridge Subjected to Blast Loading
Subversive blasts and accidental explosions throughout the globe seek increased attention toward blast-resistant design of structures. Bridges being one of the most important structures pertaining to role in emergency response and economy of the nation crave for the increased attention of structural engineers when it comes to the blast-resistant design of bridges. In this study, a finite element analysis has been conducted using ABAQUS/CAE-2017, to investigate the effect of the location of the explosive charge on the dynamic response of a single-span reinforced concrete (RC) bridge deck supported on three symmetrically placed RC girders subjected to blast loading. Blast pressure profiles have been modeled using the published empirical relationships for two scaled distances. Four different locations of the explosive charge along the mid-span section of the girder, such as blast on the central girder above the deck, blast between two adjacent girders above the deck, blast on the overhang portion above the deck, and one below the middle girder, have been considered. The high explosive charge of weight 1000 kg (TNT) at standoff distances of 0.5 and 1.0 m has been considered. Crack pattern has been observed. Percentage concrete damages have been evaluated using damage evaluation and element removal technique, a provision available in ABAQUS software. Concrete damage plasticity (CDP) model has been used for modeling concrete elements. The maximum displacements obtained have been compared with the provisions of AASHTO: LRFD Bridge Design Specifications (2014).
Damage Evaluation of Reinforced Concrete Bridge Subjected to Blast Loading
Lecture Notes in Civil Engineering
Chandrasekaran, Srinivasan (editor) / Kumar, Shailendra (editor) / Madhuri, Seeram (editor) / Dar, Roouf Un Nabi (author) / Alam, Mehtab (author)
2021-04-01
12 pages
Article/Chapter (Book)
Electronic Resource
English
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