5837-10 - Development of the PCA Design Method for Concrete...

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Development of the PCA Design Method for Concrete Pavements Two Failure Criteria: 1. Fatigue Failure Criteria Miner’s Rule Failure occurs when 3 n i / N i $ 1 where n i = number of repetitions for load group i N i = allowable number of repetitions for load group i. Load Repetitions (N i ) vs. Stress Ratio ( σ /S C )
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2. Erosion Failure Criteria wp/ l Load Repetitions to Failure due to erosion (N i ) w = maximum deflection caused by applied load p = pressure at slab-foundation interface l = radius of relative stiffness = [ED 3 /12(1 - µ 2 )k] 0.25 Relationship between wp/ l and N i was developed using results from the AASHO Road Test Miner’s Rule is also applied to predict failure due to erosion. Failure (due to erosion) occurs when 3 n i / N i $ 1 where n i = number of repetitions for load group i N i = allowable number of repetitions for load group i to cause failure due to erosion.
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Method for Computation of Maximum Stress for Fatigue Analysis -Axle loads are placed at the edge of the slab. -Maximum stress due to the loads are computed by using a
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This note was uploaded on 05/26/2011 for the course TTE 5837 taught by Professor Staff during the Spring '11 term at University of Florida.

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5837-10 - Development of the PCA Design Method for Concrete...

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