Abstract
Concrete roads may have different layout arrangement. The structures made of isolated prefabricated slabs are used for the construction of temporary roadways. The paper deals with numerical simulation of moving load effect on isolated slabs on elastic foundation. The computing model of a lorry and computing model of a slab are introduced. The deflections at the middle of the slab and tire forces of vehicle are modeled under various conditions. The influence of speed of vehicle motion and influence of initial conditions are evaluated. The results are presented in time domain in graphical and numerical manner.
Highlights
Concrete slabs are widely used in road building
The results of solution are influenced by vehicle initial conditions at the moment of vehicle entry on the slab
Variant b – vehicle springs are lightened, mass body m1 amplitude is up oriented from the equilibrium position
Summary
Concrete slabs are widely used in road building. Isolated plates are usually used for the temporary pavement structures. Numerical methods enable to simulate moving load effect in dynamic regime with satisfactory precision. The computing models of vehicles can be created on various levels. For the purpose of this task the plane computing model is adopted. The pavement is modelled as the thin slab on elastic foundation. The assumption about deflection plate of the slab is introduced to reduce the partial differential equation of motion on ordinary differential equation. The problem is solved by numerical way. The results depend on the speed of the vehicle and on its initial conditions. The deflections in the middle of the slab and tire forces are calculated. The results are presented in numerical and graphical manner
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