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Performance-Based Blast-Resistant Design of RC Bridge Under Vehicular Bombs
Bridge piers are crucial elements that provide support for the superstructures of bridges. The blast resistance of piers has received significant attention due to the increasing number of intentional and unintentional explosive assaults on bridge structures. However, the majority of the current research is on analyzing the dynamic response of a single pier to blast-induced forces, without taking into account the redundancy of the bridge or the actual traffic performance of the entire structure. The objective of this chapter is to present a design strategy for RC bridge piers that focuses on performance and resistance to explosions caused by vehicle explosives. The distribution model of blast impulse on bridge piers is provided, taking into account both the ground reflections and diffractions of piers. This model is based on a verified FEA technique. Subsequently, the accuracy of the fiber beam element-based model and the blast impulse distribution model mentioned above was confirmed by the dynamic monotonic loading test and the explosion test conducted on an RC frame column. Moreover, a simpler prototype of an RC bridge, based on fiber element beams, was created and used for conducting parametric tests. The response surface methodology was utilized to develop a performance-based blast-resistant design procedure for three specific design basis threats outlined in FEMA: cargo van bomb, small moving van bomb, and moving van bomb. The relative vertical displacement of the mid-bent was used as the performance index in this proposed design procedure.
Performance-Based Blast-Resistant Design of RC Bridge Under Vehicular Bombs
Bridge piers are crucial elements that provide support for the superstructures of bridges. The blast resistance of piers has received significant attention due to the increasing number of intentional and unintentional explosive assaults on bridge structures. However, the majority of the current research is on analyzing the dynamic response of a single pier to blast-induced forces, without taking into account the redundancy of the bridge or the actual traffic performance of the entire structure. The objective of this chapter is to present a design strategy for RC bridge piers that focuses on performance and resistance to explosions caused by vehicle explosives. The distribution model of blast impulse on bridge piers is provided, taking into account both the ground reflections and diffractions of piers. This model is based on a verified FEA technique. Subsequently, the accuracy of the fiber beam element-based model and the blast impulse distribution model mentioned above was confirmed by the dynamic monotonic loading test and the explosion test conducted on an RC frame column. Moreover, a simpler prototype of an RC bridge, based on fiber element beams, was created and used for conducting parametric tests. The response surface methodology was utilized to develop a performance-based blast-resistant design procedure for three specific design basis threats outlined in FEMA: cargo van bomb, small moving van bomb, and moving van bomb. The relative vertical displacement of the mid-bent was used as the performance index in this proposed design procedure.
Performance-Based Blast-Resistant Design of RC Bridge Under Vehicular Bombs
Springer Tracts in Civil Engineering
Wu, Hao (author) / Cheng, Yuehua (author) / Ma, Liangliang (author)
2024-08-20
26 pages
Article/Chapter (Book)
Electronic Resource
English
Structural Design for Vehicular Bombs
| British Library Conference Proceedings | 1996
Blast-Resistant Design Approach for RC Bridge Piers
| Springer Verlag | 2024