MMLS3加速加载试验模型路面结构相似性设计

Design of model pavement structure under the MMLS3 load by similarity theory

通过相似理论和模型设计方法,分析研究了MMLS3室内加速加载试验模型路面结构的理论设计参数和设计方法,对原型路面结构进行缩放设计以满足室内MMLS3加速加载试验。并通过BISAR理论计算对其进行验证。研究结果表明,为获得与原型路面相似的力学性能,缩放后的路面结构模型必须保持各层材料与原型路面结构相同,各层厚度为原型路面的1/3,荷载为标准轴载的1/9。通过BISAR进行理论计算分析,可以确定模型路面的平面上最小尺寸应为100cm×100cm。

At present,the research on asphalt pavement structure model by MMLS3 is quite less,and the design method of the model structure under MMLS3 load is undefined.In this paper,the design method and parameters of the model structure are studied by similarity theory and model design theory,and it is proved by theoretical calculation with BISAR. Some conclusion can be made in order to have the same mechanical property with the origi-nal structure,the model structure should have the same material with the original structure in each layer;the similarity ratio of the thinkness and load between the model and original structure are 1/3 and 1/9;the minimum plane size of the model structure is 100 cm × 100 cm.