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A platform for research: civil engineering, architecture and urbanism
Blast Protection of Cable-Stayed and Suspension Bridges
One of the most common types of deck structure in steel cable-stayed and suspension bridges is the steel orthotropic box girder deck. This paper summarizes results from a study that investigated the response of such bridges to blast loads and developed new blast protection technologies for these bridges. In this study, we subjected inelastic, non-linear finite element models of typical orthotropic deck structures that are used in major cable-supported bridges to simulated blast effects using the MSC.Dytran finite element analysis software. The three most important findings were: (1) decks with mild steel perform better under blast load than the decks with high strength steel, (2) traditional suspension bridges, where the main cables are anchored to the anchor blocks in the ground, perform extremely well when subjected to blast loads on the deck; and (3) the self-anchored suspension bridges, where the main cables are anchored to the bridge deck rather than the anchor blocks performed poorly and underwent global P-Δ instability and progressive collapse. These large P-Δ effects were created by the presence of large axial forces in the deck. An innovative protection system called "Son-Astaneh Fuse System (SAFS)" was developed and proposed that can effectively and economically prevent progressive collapse of the cable-supported bridge spans, especially those, such as the self-anchored suspension bridges, with high blast-induced axial loads in the deck.
Blast Protection of Cable-Stayed and Suspension Bridges
One of the most common types of deck structure in steel cable-stayed and suspension bridges is the steel orthotropic box girder deck. This paper summarizes results from a study that investigated the response of such bridges to blast loads and developed new blast protection technologies for these bridges. In this study, we subjected inelastic, non-linear finite element models of typical orthotropic deck structures that are used in major cable-supported bridges to simulated blast effects using the MSC.Dytran finite element analysis software. The three most important findings were: (1) decks with mild steel perform better under blast load than the decks with high strength steel, (2) traditional suspension bridges, where the main cables are anchored to the anchor blocks in the ground, perform extremely well when subjected to blast loads on the deck; and (3) the self-anchored suspension bridges, where the main cables are anchored to the bridge deck rather than the anchor blocks performed poorly and underwent global P-Δ instability and progressive collapse. These large P-Δ effects were created by the presence of large axial forces in the deck. An innovative protection system called "Son-Astaneh Fuse System (SAFS)" was developed and proposed that can effectively and economically prevent progressive collapse of the cable-supported bridge spans, especially those, such as the self-anchored suspension bridges, with high blast-induced axial loads in the deck.
Blast Protection of Cable-Stayed and Suspension Bridges
Son, J. (author) / Astaneh-Asl, A. (author)
Technical Council on Lifeline Earthquake Engineering Conference (TCLEE) 2009 ; 2009 ; Oakland, California, United States
TCLEE 2009 ; 1-12
2009-06-24
Conference paper
Electronic Resource
English
Blast Protection of Cable-Stayed and Suspension Bridges
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