Abstract
The purpose of the research is to develop formulas, expressions and a computer program for concrete airfield pavement design under the impact of all Airbus 380 main landing gears taking into consideration the design factor of tensile stresses at the top and bottom of a concrete slab. The top-down cracking in concrete slabs has not been directly simulated in structural analysis models used for one- and two-layer concrete airfield pavement design by the Ukrainian Standard. Empirical formulas for the calculation of top tensile stress and the coverages to failure using the criterion of top tensile stress are obtained. Computer program “Aerodrom 380” has been developed for the design of concrete airfield pavement thickness. It provides the required thickness of a concrete slab needed to support an Airbus 380 over a particular subgrade and uses the bottom and top tensile stresses as design factors. “Aerodrom 380” contains a fatigue function for determining the number of coverages to failure permissible for a concrete slab before it has top-bottom and bottom-up cracks. The results obtained with this program are compared to other solutions using the Ukrainian Standard SNiP 2.05.08–85, “LIRA-SAPR”, software and the FAARFIELD computer program. The anticipated life of a concrete airfield pavement calculated using computer program “Aerodrom 380” is about 70% of the FAARFIELD pavement life.
Highlights
In Ukraine, the conventional rigid pavement of international airports is a two-layer concrete pavement on a stabilized base
The top-down cracking in concrete slabs has not been directly simulated in structural analysis models used for one- and two-layer concrete airfield pavement design by the Ukrainian Standard (SNiP 2.05.08–85)
The assessment of the impact of aircraft full main landing gears is not supported by the Ukrainian Standard (SNiP 2.05.08–85) and FAARFIELD (AC 150/5320– 6E)
Summary
In Ukraine, the conventional rigid pavement of international airports is a two-layer concrete pavement on a stabilized base. The improvement of the two-layer rigid pavement design is important, especially for pavement analysis under the impact of the main landing gears of new large wide-body aircraft such as the A380– 800 (WV000–009). The purpose of this research is to develop the formulas, expressions, and a computer program for concrete airfield pavement design under the impact of the A380–800 main landing gears, taking into consideration tensile stresses at the top and bottom of a concrete slab as the design factor. The top-down cracking in concrete slabs has not been directly simulated in structural analysis models used for one- and two-layer concrete airfield pavement design by the Ukrainian Standard (SNiP 2.05.08–85)
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