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 MORE THAN 90 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.
Highlights
In highway roads, opposite lanes must be separated by concrete road divider barriers
Experimental impact tests have been established in several studies that have used full-scale vehicle tests to test the ability of concrete barriers to withstand impact loads exerted on them by collisions with vehicle, Consolazio et al (2003) and Bambach et al (2010)
The parameters used in impact tests can be arranged in order according to the National Cooperative Highway Research Program (NCHRP) Report 350, Ross et al (1993) and a collision angle of 90°, which is used in laboratory tests
Summary
Opposite lanes must be separated by concrete road divider barriers. Zain and H.J. Mohammed /Concrete road barriers subjected to impact loads: An overview. Concrete barriers currently in use are insufficient because they cause death in road accidents. Safety can be increased by reducing the impact of vehicle collisions with the use of concrete road divider barriers. We need to reduce the crash continuity of the vehicle during its collision with the concrete barrier. This study reviews the literature on road concrete barriers under applied impact loads. Experimental and theoretical tests would elucidate the process of vehicle collision with concrete barriers and would determine the effects of the impact load. The test parameters involve three main effective factors: the collision angle of the vehicle to the concrete barrier, the speed of the vehicle when it hits the barrier, and vehicle weight
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