Quantitative Resistance Assessment of Steel Girder Bridges Subjected to Blast LoadsSource: Journal of Bridge Engineering:;2024:;Volume ( 029 ):;issue: 009::page 04024069-1DOI: 10.1061/JBENF2.BEENG-6821Publisher: American Society of Civil Engineers
Abstract: The blast resistance of a typical two-lane steel girder highway bridge structural system was modeled using a nonlinear finite-element approach that considered material damage, fracture, and separation. Critical blast scenarios were based on field observations of terrorist attacks on bridges in Iraq, while system failure was defined in terms of practical emergency serviceability criteria used on actual blast-damaged bridges. The blast resistance of various design parameters was assessed, including the number of girders, deck concrete strength, reinforcement ratio, slab thickness, girder and reinforcement yield strength, girder sectional dimensions, and pier column width. The presented approach uniquely quantifies structural system blast resistance in terms of the charge weight that can be applied at different locations until failure. A sensitivity analysis was conducted to determine the most influential design parameters. It was found that system blast capacity was primarily influenced by the number of girders and girder yield strength, while additional significant parameters were deck compressive strength, deck thickness, web stiffener width, and girder depth. Secondary parameters were deck reinforcement ratio, girder flange, and web thickness, while deck reinforcement yield stress was found to be insignificant. Based on the results, recommendations for improving blast resistance are provided.
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contributor author | Ahmad Alsendi | |
contributor author | Christopher D. Eamon | |
date accessioned | 2024-12-24T10:17:46Z | |
date available | 2024-12-24T10:17:46Z | |
date copyright | 9/1/2024 12:00:00 AM | |
date issued | 2024 | |
identifier other | JBENF2.BEENG-6821.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4298651 | |
description abstract | The blast resistance of a typical two-lane steel girder highway bridge structural system was modeled using a nonlinear finite-element approach that considered material damage, fracture, and separation. Critical blast scenarios were based on field observations of terrorist attacks on bridges in Iraq, while system failure was defined in terms of practical emergency serviceability criteria used on actual blast-damaged bridges. The blast resistance of various design parameters was assessed, including the number of girders, deck concrete strength, reinforcement ratio, slab thickness, girder and reinforcement yield strength, girder sectional dimensions, and pier column width. The presented approach uniquely quantifies structural system blast resistance in terms of the charge weight that can be applied at different locations until failure. A sensitivity analysis was conducted to determine the most influential design parameters. It was found that system blast capacity was primarily influenced by the number of girders and girder yield strength, while additional significant parameters were deck compressive strength, deck thickness, web stiffener width, and girder depth. Secondary parameters were deck reinforcement ratio, girder flange, and web thickness, while deck reinforcement yield stress was found to be insignificant. Based on the results, recommendations for improving blast resistance are provided. | |
publisher | American Society of Civil Engineers | |
title | Quantitative Resistance Assessment of Steel Girder Bridges Subjected to Blast Loads | |
type | Journal Article | |
journal volume | 29 | |
journal issue | 9 | |
journal title | Journal of Bridge Engineering | |
identifier doi | 10.1061/JBENF2.BEENG-6821 | |
journal fristpage | 04024069-1 | |
journal lastpage | 04024069-15 | |
page | 15 | |
tree | Journal of Bridge Engineering:;2024:;Volume ( 029 ):;issue: 009 | |
contenttype | Fulltext |