A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dynamic Behaviour of Bridge Pier Due to Direct Vehicle Collision
Bridge is the structure that is expected several normal and postulated dynamic loads. Vehicle collision with the bridge pier is one of the postulated dynamic loads considered in the design provisions. The Indian code IRC-6 consider the vehicle collision load as equivalent static load, whereas European standards EN 1991-1-7 gives provisions for both static and dynamic analysis. However the both codes don’t give a simplified mathematical model for the dynamic analysis. The Finite element analysis (FEA) is the popular method used for analysis of pier subjected to the collision load. However, the finite element analysis requires a combination of vehicle and concrete structure modeling which is a tedious process.
This analytical study includes calculation of dynamic load on the bridge pier as per Eurocode EN 1991-1-7 and its dynamic responses, due to the direct vehicle collision with pier. In this article a simplified model the pier is discussed. Since majority of mass located at the top of the pier and the collision load is acting at bottom part of the pier, pier is modelled as a Two Degrees of Freedom System and the Lumped mass approach is adopted. The dynamic responses of the pier are calculated by Newmark’s Beta Linear Acceleration Method. The dynamic analysis of vehicle collision load also gives the load transferred to the superstructure and its components like bearings.
Comparison study of the effect of the impact of the vehicle having 30 tonnes mass and 300 kN/m stiffness with speed 130, 90, 70 and 50 km/h as per EN 1991-1-7: 2006, shows that there is no significant difference in response of the pier for hard impact when vehicle speed varies from 50 to 130 km/h. This may be due to the peak intensities of dynamic actions affect the structure over such a short time in which the structure cannot properly respond to them. However, acceleration response is significantly high when the velocity of impact increases. And vehicle impact load never fails to induce a considerable amount of base shear in the column which is more than the equivalent static loading suggested IRC-6.
Dynamic Behaviour of Bridge Pier Due to Direct Vehicle Collision
Bridge is the structure that is expected several normal and postulated dynamic loads. Vehicle collision with the bridge pier is one of the postulated dynamic loads considered in the design provisions. The Indian code IRC-6 consider the vehicle collision load as equivalent static load, whereas European standards EN 1991-1-7 gives provisions for both static and dynamic analysis. However the both codes don’t give a simplified mathematical model for the dynamic analysis. The Finite element analysis (FEA) is the popular method used for analysis of pier subjected to the collision load. However, the finite element analysis requires a combination of vehicle and concrete structure modeling which is a tedious process.
This analytical study includes calculation of dynamic load on the bridge pier as per Eurocode EN 1991-1-7 and its dynamic responses, due to the direct vehicle collision with pier. In this article a simplified model the pier is discussed. Since majority of mass located at the top of the pier and the collision load is acting at bottom part of the pier, pier is modelled as a Two Degrees of Freedom System and the Lumped mass approach is adopted. The dynamic responses of the pier are calculated by Newmark’s Beta Linear Acceleration Method. The dynamic analysis of vehicle collision load also gives the load transferred to the superstructure and its components like bearings.
Comparison study of the effect of the impact of the vehicle having 30 tonnes mass and 300 kN/m stiffness with speed 130, 90, 70 and 50 km/h as per EN 1991-1-7: 2006, shows that there is no significant difference in response of the pier for hard impact when vehicle speed varies from 50 to 130 km/h. This may be due to the peak intensities of dynamic actions affect the structure over such a short time in which the structure cannot properly respond to them. However, acceleration response is significantly high when the velocity of impact increases. And vehicle impact load never fails to induce a considerable amount of base shear in the column which is more than the equivalent static loading suggested IRC-6.
Dynamic Behaviour of Bridge Pier Due to Direct Vehicle Collision
Structural Integrity
Fonseca de Oliveira Correia, José António (editor) / Choudhury, Satyabrata (editor) / Dutta, Subhrajit (editor) / Rahman, P. Anasu (author) / Reddy, G. Rami (author) / Venkataramana, Katta (author)
International Conference on Advances in Structural Mechanics and Applications ; 2021 ; Silchar, India
Advances in Structural Mechanics and Applications ; Chapter: 10 ; 142-166
Structural Integrity ; 19
2022-06-08
25 pages
Article/Chapter (Book)
Electronic Resource
English