Measurement of Vertical Compressive Stress Pulse in Flexible Pavements: Representation for Dynamic Loading Tests

摘要: Testing at Virginia Smart Road allowed determination of the vertical compressive stress pulse induced by a moving truck and falling weight deflectometer (FWD) loading different locations beneath pavement surface. was performed on 12 flexible sections. Stress temperature were measured using pressure cells thermocouples, respectively, that had been installed during construction road. Target testing speeds 8 km/h, 24 40 72 km/h. The considered depths below surface mm, 190 267 419 597 mm. A haversine or normalized bellshape equation found to be good representation for vehicle. Haversine duration times varied from 0.02 s vehicle speed 70 km/h depth mm 1 10 For FWD loading, with 0.03 approximate str...