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讨论了各种结构和层间接触条件下等截面弯曲刚度的换算方法,并给出了计算式,当温度沿面层层厚线性分布时,给出了沥青面层当量模量简便的代数计算式,对比分析了几种不同面层当量模量的弯沉计算误差。结果表明:采用所提出的等截面弯曲刚度当量模量所得到的弯沉精度较高,相对误差一般不超过5%;采用面层中点温度所对应的当量模量,在沥青面层与下卧层层间连续,以及温度沿面层层厚分布变化比较剧烈时,其弯沉计算相对误差有可能超过15%;采用面层平均温度所对应的当量模量计算得到的弯沉相对误差有可能超过10%。
The method of calculating the equivalent bending stiffness under various conditions and interlayer contact conditions is discussed and the formula is given. When the temperature is linearly distributed along the surface layer thickness, the equivalent algebraic calculation of asphalt surface layer is given Formula, comparative analysis of several different surface equivalent modulus of deflection calculation error. The results show that the accuracy of deflection obtained by using equivalent equivalent modulus of equivalent cross-section bending stiffness is relatively high, and the relative error is generally not more than 5%. Using the equivalent modulus corresponding to the midpoint temperature of the surface layer, The relative error of the deflection calculation may be over 15% when the horizontal interval between layers is continuous and the temperature changes drastically along the surface layer thickness. The relative error of deflection calculated by the equivalent modulus corresponding to the average surface temperature is Probably more than 10%.