This study utilizes finite element computational tools to conduct the simulation and analysis of Retroreflective Raised Pavement Markers (RRPMs) onflexible pavement. The critical locations and magnitudes of stress inside markers during the tire-marker impact are identified. Various external factors, such as tire loading, tire speed, contact angle and contact location, are investigated to assess their effects on stresses inside markers. In addition, simulation results of RRPM stresses on flexible pavement are compared with those on rigid pavement obtained from a previous study. The different stress patterns from rigid and flexible pavement indicate the need to distinguish the laboratory testing procedures based on pavement type. Simulation are also conducted for identifying the best lab test procedures, through matching stress patterns inside RRPMs from the tire-marker impact simulation and the candidate lab test simulation.
Abstract