Dynamic behavior of infinite beams resting on elastic foundation under the action of moving loads

摘要

From the above analysis it is concluded that for usual civil engineering structures, it is impossible for one to achieve the critical speeds, since they are significantly higher than the ones of the corresponding free single-span simply-supported beam even on cohesionless soils. The proposed formulae are accurate for subcritical speeds either with or without damping. This accuracy is significant for normal and well-designed beams even when they are founded on cohesionless soils, but it decreases for feeble beams on cohesionless soils as one approaches the critical speed.