Abstract:
This study investigated the effect of different Load Transfer Efficiency (LTE) models from international units such as AASHTO, FHWA, ACPA, FAA and Dynatest, on flexural stress analysis in rigid pavement. The LTEΔ models were divided into 4 main types. The flexural stress calculated from each LTE model affected the design, maintenance, and strength assessment on concrete pavement. A jointed concrete pavement loaded by a Thai 10-wheel-truck (25 tons) was simulated. The thickness value of in-service concrete roads was determined by Bore scope equipment. The flexural stress at a transverse joint of the loaded slab with different LTEΔ models was analyzed using the computer program PAVERS, which was based on Westergaardss theory. The results showed that the highest flexural stress was obtained from type 1 of the LTEΔ model, as calculated by the deflection ratio between unloaded to loaded slabs. The impact of all LTEΔ models on the flexural stress was inversely proportional to the thickness of the concrete slab and low flexural strength of the concrete slab. In addition, the LTEΔ models of type 3 and 4, which was corrected by mid slab deflection testing, could also have significant effects on the flexural stress analysis and LTEσ. Furthermore, Westergaadss theory was not suitable for investigating the correlation between LTEΔ and LTEσ.