沥青混凝土面层底面容许拉应变验算

Verification Calculation of Allowable Tensile Strain of Bottom Surface of Asphalt Concrete Pavements

现行沥青路面设计规范中,并未要求对沥青混凝土面层底面容许拉应变进行验算,但却是国外某些较成熟的沥青路面设计中必不可少的一个环节。对国外拉应变验算方法、温度与拉应变的关系、影响拉应变的因素进行了介绍、分析,对底面拉应变验算在沥青混凝土路面设计的必要性进行了论述。可为进行拉应变验算提供相应的参考。

In China＇ s asphalt concrete pavement design standards, it is not required to execute verification calculation on the allowable tensile strain of the bottom surface of the asphalt concrete pavements, which, however, is an integral part of some mature design standards of asphalt concrete pavements of some foreign countries. In the paper, the foreign tensile strain verification calculation methods, the relationship between temperature and tensile strain and the factors affecting the tensile strain are presented and the necessity of the verification calculation of the tensile strain in the design of the asphalt concrete pavement is expatiated, which can provide reference for the verification calculation of the tensile strain.