The dynamic behavior of a reinforced concrete planar frame under collision load

Abstract

Research article on planar reinforced concrete (RC) frames being collided by vehicles, mainly medium-range trucks. The RC frame has 3 spans and 2 floors, and applied with a static load of 1000kN at position 1.5 m from top of the road then design the reinforcement to bear this load. Using LS-DYNA software, simulate the RC frames colliding directly with the frame at speeds ranging from 40km/h to 100km/h by 7.5 tons medium truck. The maximum impact force ranges from 1546kN to 9844kN, and the shear force at the impacted column base ranges from 1530kN to 5589kN.The results showed that the impact force acting on the column and structural damage differ with vehicle speed, using static force in the design unsafe. Furthermore, at maximum impact force, the impact energy is absorbed mostly by the impacted column and not by the other frame columns. The simulation's results show that the shear force at the base of the impacted column is approximately  99% of the peak impact force, whereas the remaining columns in the frame are less than 10%.

Keywords: Collision load; reinforced concrete planar frame; LSDYNA; dynamic behavior.