沥青加铺层温度应力研究(Ⅱ):内力及层间反力近似解

Thermal Stresses in Asphalt Overlay Paved on Existing Cement Concrete Pavements (Ⅱ):Approximate Solutions to Section Internal Forces and Interface Forces

摘要:

将旧水泥混凝土路面板温度变化引起的沥青加铺层路面结构的变形效应,分解为旧水泥混凝土路面板收缩引起的拉压效应、翘曲引起的弯曲效应，以及已知层间水平摩阻应力引起的弯曲效应三种，推导这三种效应的解析解；讨论旧水泥混凝土路面板收缩和翘曲时上述三种效应的组合及相互影响，给出沥青加铺层截面内力、层间接触应力的计算显式，并论证用这种先分解后组合的方法求解旧水泥混凝土路面板上沥青加铺层温度应力是可行的,且具有足够精度.

Abstract:

The complicated deformation effects in bilayer beams are then decomposed to three types of basic deformation effects including uniaxial tensioncompression effect induced by shrinkage deformation in bottom layered beam regardless of bilayer beams’ bending effect, bending effect caused by horizontal interlayer friction neglecting uniaxial tensioncompression deformation in bottom layered beam, and bending effect created by curling deformation in bottom layered beam, the analytical solutions to the above three basic deformation effects in bilayer beams are obtained accordingly. Furthermore, the combinations and influences among those three basic deformations while shrinkage and curling deformation occurs in bottom layered beam are discussed; a group of concise formulas for sectional internal forces in asphalt overlay, interface reaction force and interface shearing stress is provided, and the concise formulas for calculating internal forces in asphalt overlay also prove to be precise enough.