Influence of Dowel Parameters on Mechanical Response of Concrete Around Dowel Bars

Abstract:

Establishing the threedimensional finite element model, the concretedowel friction coefficient, dowel diameter, dowel bar spacing and slab thickness were taken as the impact factors. The singlefactor rotation method was used to analyze the variation of the mechanical response of the concrete around dowel bar. The results showed that with the increase of the concretedowel friction coefficient, the maximum horizontal tensile stress is significantly reduced, while the vertical tensile stress does not decrease, so there is a reasonable interfacial friction coefficient. When the dowel diameter increases from 28 mm to 36 mm, the interface stress level decreases greatly. With the increase of the dowel bar spacing, the interface stress increases, and the growth rate increases with the increase of the spacing. The increase of slab thickness reduces the stress level of concrete around dowel bar slightly.

Key words:mechanical response;finite element model;dowel steel;the concrete around the bar;impact factors