Studie analyzuje slabá místa JPCP vozovek s dowel tyčemi v příčných spárách. Na základě měření na letištních a dálničních vozovkách zjišťuje nedostatečný přenos zatížení a identifikuje příčiny. Výsledky ověřuje metodou konečných prvků, která ukazuje vysoké tahové napětí v okolí spár.
Abstract
Dowels are located in transverse joints of Jointed Plain Concrete Pavements (JPCP) and they are used to provide load transfer between individual slabs, reduce faulting and improve performance. Dowels and the concrete itself are under the highest stress in the vicinity of joints; thus, in terms of pavement design, the joints are the weakest points of the whole structure. This study dealt with the drawbacks of JPCP with dowels. The evaluation was based on direct measurements on real airport and motorway pavements and highlights insufficient efficiency of load transfer and its possible causes. The authors present a successful outcome with validation by using the finite element method where high tensile stress values of the surrounding concrete were found.