Evaluation Method of Airfield Rigid Pavement Structural Strength Based on Monitored Strains
The real-time and accurate evaluation of airfield rigid pavement structural strength is an im-portant guarantee for the long-term durability and airworthiness safety of airport facility.Foundation top surface reaction modulus K value plays a decisive role in determining pavement structural strength.Relying on the intelligent airport runway system in southwest China,the dynamic strain re-sponses of airfield rigid pavement under the passing events of Type C aircrafts were collected.HWD deflection tests were conducted to obtain the initial pavement structural parameters,and a full-scale fi-nite element model was established for airfield rigid pavement with nine slabs.Considering the influ-ence of wheel offset and the reaction modulus K value on the monitored dynamic strain in pavement slab,the functional relationship curve between K value and the expected strain peakεvalue was es-tablished.The bridge-crossing principle was used to compensate the deviation between the simulation model and the actual structure of the airfield rigid pavement,and the simulation function relationship was converted to the actual function relationship.The reaction modulus K value can be evaluated in real time based on the actual function relationship and the measured strains.Then the relationship be-tween the airfield pavement structural strength evaluation index PCN value and the K value was estab-lished by using the equivalent single wheel load method,and the real-time evaluation of the airfield rigid pavement structure strength was realized.
airfield rigid pavementstructural strengthfoundation top surface reaction modulusmo-nitored strainreal-time evaluation
万方数据
维普
