Study on Impact Behavior and Impact Force of Bridge Pier Subjected to Vehicle Collision

The increasing occurrence of vehicle-pier collision accidents has significant influences on the safety of bridge structures. In order to study the impact behavior of bridge piers, a vehicle-double-pier collision numerical model was developed by LS-DYNA. Nonlinear material constitutive laws consideri...

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Bibliographic Details
Published in:Shock and vibration 2017-01, Vol.2017 (2017), p.1-12
Main Authors: Guo, Changtuan, Wang, Juan, Li, Ruiwen, Zhou, Deyuan
Format: Article
Language:English
Subjects:
Bridge piers
Bridges
Building codes
Concrete
Crashworthiness
Design specifications
Failure analysis
Failure modes
Foundations and piers
Impact analysis
Impact loads
Impact strength
Impact tests
Impact velocity
Mathematical models
Numerical analysis
Reinforced concrete
Reliability analysis
Structural engineering
Studies
Traffic accidents
Vehicles
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Summary:The increasing occurrence of vehicle-pier collision accidents has significant influences on the safety of bridge structures. In order to study the impact behavior of bridge piers, a vehicle-double-pier collision numerical model was developed by LS-DYNA. Nonlinear material constitutive laws considering the strain-rate effect were used. The reliability of numerical analyses was validated. Parametric studies were carried out to investigate the effects of impact velocity, impact mass, and concrete and steel strength on the impact behaviors of piers and the impact forces. The relationship between failure modes of the impacted piers and impact energy was analyzed. Based on the numerical analysis results, the current impact design provisions of AASHTO, Eurocode, and JTG D60 were found to be unconservative, which could result in that piers designed with the current standard codes were vulnerable to the large impact energy. The recommended value of equivalent static force in the current standards is unreasonable.
ISSN:1070-9622
1875-9203
DOI:10.1155/2017/7085392