Author/Authors :
Madhkhan، M. نويسنده Department of Civil Engineering, Isfahan University of Technology, Isfahan, P.O. Box 8415683111, Iran , , Entezam، M. نويسنده Civil group, Department of Engineering, Bou-Ali Sina University, Hamedan, P.O. Box 651744161, Iran , , Torki، M.E. نويسنده Department of Civil Engineering, Sharif University of Technology, Tehran, P.O. Box 1136511155, Iran ,
Abstract :
This article deals with the mechanical properties of steel-reinforced concrete precast slab tracks
on non-ballasted elasto-plastic foundations. To work out the spanning behavior of slab tracks, a FEM
analysis was executed for discrete and continuous systems. At first, full-size slabs without foundation
including solid and hollow-core specimens (with 30% weight reduction) were tested under centric static
(monotonic) line loads, and loaddeflection curves were extracted. Then, FEM results for zero foundation
stiffness were verified with those of experiments, which were in good agreement. Original results include
the effects of several parameters on the cracking load, ultimate load, and energy absorption of slabs placed
on elasto-plastic foundations including the slab width, concrete tensile strength and load factor. Analyses
revealed that mechanical properties in hollow-core sections are not so different from those in solid ones,
and thus hollow-core sections are more efficient because of significant weight reduction.
