摘要
利用弹性层状理论计算程序Bisar分析了基层模量对沥青面层内部竖向压应力、剪应力、面层底部拉应力和表面弯沉的影响 ,进而计算了基层模量对路面稳定性、疲劳寿命和永久变形的影响 .分析表明 ,基层的模量必须保持在一个合理的范围内 ,才能从整体上获得好的路用性能 .较高的基层模量会增加面层竖向压应力 ,易于引起路面车辙 ,但过低的基层模量会增大路面表面的剪应力并使沥青层底部受拉 ,进而降低沥青路面在行车荷载作用下的疲劳寿命 .由此得出了沥青路面合适的基层模量范围在 0 8～ 1 2GPa之间 .
By means of Bisar procedure based on elastic layer theory,the influence of road base's module on vertical compressive stress and shear stress of asphalt surface,tensile stress at the bottom of surface and deflection of surface is analyzed. And the influence of base's module on stability, fatigue life and permanent deformation is also discussed. The results show that good pavement performance could be achieved only when the base's module keeps in a reasonable range. Excessive value of base's module can result in great vertical compressive stress to generate rut,but insufficient value can result in great shear pressure and may arouse tensile pressure at the bottom of asphalt layer causing the reduction of fatigue life of asphalt pavement. An appropriate value of road base's module ranging from 0 8?GPa to 1 2?GPa is recommended.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第4期81-83,共3页
Journal of Southeast University：Natural Science Edition
关键词
基层模量
粘弹性理论
车辙
路面弯沉
性能
沥青路面
module of base
theory of viscoelasticity
rutting
deflection of road surface
