基于温度应力等效的基顶当量回弹模量换算方法

在水泥混凝土路面温度应力计算中采用的基顶当量回弹模量,是基于基顶弯沉等效为原则换算得到的,这种换算原则并不能真实反映基层对路面板温度应力的影响规律。利用有限元法对温度应力进行了大量计算,在此基础上建立了以温度应力等效为原则的基顶当量回弹模量换算方法。与有限元解比较,结果表明该换算方法的精度完全能满足工程计算的需要,其成果可供规范修订时参考。

Calculation Method of Equivalent Modulus of Elasticity of Foundation Under Principles of Thermal Stress Equivalence

Calculation method of the equivalent modulus of elasticity of foundation based on the principles of displacement equivalence can't factually reflect the influence of semi-rigid base on the thermal stresses in cement concrete pavement.The paper has established the calculation method of the equivalent modulus of elasticity of foundation that is based on the principles of thermal stress equivalence.The method could accurately reflect the influence of the modulus and thickness of semi-rigid type base on the cement concrete pavement thermal stresses.The thermal stresses computed results based on the calculation method of equivalent modulus of elasticity of foundation under the principles of thermal stress equivalence is consistent with Three-Dimensional Finite Element computed results,which indicates that the calculation method is reliable and can be referenced in the revision of specifications of Cement Concrete Pavement Design for Highway.