Numerical Analysis for Basalt Fiber Reinforced High-viscosity Asphalt Concrete Bridge Deck Pavement

Abstract

Basalt fiber reinforced asphalt concrete has better durability, crack resistance and temperature stability than traditional untreated asphalt concrete, being gradually used in pavement engineering in China over recent years. In 2014, basalt fiber reinforced asphalt concrete with high-viscosity asphalt modifier was utilized as the top layer of the deck pavement on Shangci Bridge, which was a 240m prestressed concrete continuous T-beam bridge, located in Quzhou, Zhejiang Province, China. In this paper, a three-dimensional model was established to analyze the distribution law of internal stress and strain of the deck pavement when it was under traffic load. The results indicate that thickness, elastic modulus and interface bonding conditions of the deck overlays have different effects on its internal stress and strain distribution. In another two-dimensional model, the high-temperature viscoelasticity response induced by cycle load was obtained on the basis of laboratory creep tests. Under the effect of the cycle load, the largest horizontal creep strain at 60 is calculated to be 379 , accounting for 85% of the total strain.