Hsing Chun-Hua, Siao Jun-Han, Wang Yu-Min
Department of Civil Engineering, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan.
General Research Service Center, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan.
Materials (Basel). 2022 Jun 21;15(13):4391. doi: 10.3390/ma15134391.
This study investigated vertical strain and stress through a dynamic load experiment at the testing area of Ke-Da Road, Pingtung, Taiwan. A thirty-five-ton truck was moved at constant speeds of 40, 60, and 80 km/h to simulate heavy load conditions to study the mechanical variations. From the results, it was found that the strain and stress curves of the permeable road pavement showed asymmetry due to the viscoelastic property of the open-grade friction course. The results showed that vertical strains and vertical stresses of permeable road pavement were greatly affected by the axle configuration and the change in traffic speed. Furthermore, to propose the design thickness of a permeable road pavement, the pavement strain and stress were modelled with respect to depth using regression based on these collected data. According to the stress regression models and considering the construction uncertainty, the recommend design depth of a permeable pavement is 30 cm. The findings of this study would be helpful in determining the permeable road pavement depth when subjected to heavy traffic load, and the material combination of open-graded friction concrete, porous asphalt concrete, and permeable cement concrete was proposed in this study during the design period.
本研究通过在台湾屏东科大路试验区域进行的动态荷载试验，对竖向应变和应力进行了研究。一辆35吨重的卡车以40、60和80公里/小时的恒定速度行驶，以模拟重载条件，研究力学变化。结果发现，由于开级配摩擦层的粘弹性，透水路面的应变和应力曲线呈现不对称性。结果表明，透水路面的竖向应变和竖向应力受车轴配置和交通速度变化的影响很大。此外，为了提出透水路面的设计厚度，利用基于这些收集数据的回归分析，对路面应变和应力随深度进行了建模。根据应力回归模型并考虑施工不确定性，透水路面的推荐设计深度为30厘米。本研究结果将有助于确定在重交通荷载作用下透水路面的深度，并且在设计阶段，本研究提出了开级配摩擦混凝土、多孔沥青混凝土和透水水泥混凝土的材料组合。
