Concrete road barriers subjected to impact loads: An overview

Abstract

Concrete barriers prevent vehicles from entering the opposite lane and going off the road. An important factor in the design of concrete barriers is impact load, which a vehicle exerts upon collision with a concrete barrier. This study suggests that a height of 813 mm, a base width of 600 mm, and a top width of 240 mm are optimum dimensions for a concrete barrier. These dimensions ensure the stability of concrete barriers during vehicle collisions. An analytical and experimental model is used to analyze the concrete barrier design. The LS-DYNA software is utilized to create the analytical models because it can effectively simulate vehicle impact on concrete barriers. Field tests are conducted with a vehicle, whereas laboratory tests are conducted with machines that simulate collisions. Full-scale tests allow the actual simulation of vehicle collisions with concrete barriers. In the vehicle tests, a collision angle of 25°, collision speeds of 100 km per hour, and a vehicle weighing more than 2 t are considered in the reviewed studies. Laboratory tests are performed to test bridge concrete barriers in static condition.

Modeling of Combined Impact and Blast Loading on Reinforced Concrete Slabs

“…LSDyna was used to produce the model. The software had been used previously by several authors studying reinforced concrete structures, both for projectile (Wang, Li et al, 2007) and for vehicle impact (Zain and Mohammed, 2015). As the size of the model was large, and producing a relatively rapid procedure to produce damage estimates was a requirement of the project, it was decided to use a Lagrangian formulation instead of Eulerian or SPH formations used in the past by others authors (Leppänen, 2006).…”

Optimization of Dynamic Mechanical Properties of Knitted Barrier Meshes

“…This article focuses on the analysis of mechanical properties of knitted barrier meshes. It also refers to more general problems related to safety engineering, including road safety, in particular securing dangerous sections on road curves, especially on mountain roads, in places at risk of rock landslide, on viaducts, and in railroad crossings [1][2][3][4]. Barrier meshes can be applied in all those cases, and additionally they can also serve as barriers against avalanches or snow, and as a protection for mountain trails or ski runs.…”

Performance of some basic types of road barriers subjected to the collision of a light vehicle

“…Indeed, several authors [11][12][13][14][15][16] performed impact analyses using finite element FE techniques resulting in a satisfactory representation of a car crashing against a barrier. Reference [17] presented a literature review on road concrete barriers under impact loads, while [16] presented virtual impact analyses of metal defences operating under normal and irregular conditions.…”