STRUCTURAL ANALYSIS ASPHALT PAVEMENT BY FWD AND BACKCALCULATION OF ELASTIC LAYERED MODEL . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2
STRUCTURAL ANALYSIS ASPHALT PAVEMENT BY FWD AND BACKCALCULATION OF ELASTIC LAYERED MODEL . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2
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沥青路面的FWD结构分析和弹性层状模型反算。
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
K. Matsui
中科院分区：
文献类型：
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作者：
T. Inoue;K. Matsui
本文介绍了一种使用落重式弯沉仪 (FWD) 测量和弹性层状模型反算进行沥青路面结构分析的方法。采用安装在测量车辆上的两质量型落锤偏转计的无损检测方法来获取偏转数据。开发了一种反算方法，并建立了层模量和等效层系数之间的良好关系。采用弹性多层理论作为路面结构模型。反算方法最大限度地减少了测量的 FWD 挠度和计算出的挠度之间的误差，并且基于非线性最小二乘法的概念。该方法找到与各种流量分类的测量的FWD偏转最对应的层模数集合。在将该系统应用于使用中的路面路段时，必须考虑弯沉测量、层厚度和泊松比的误差对估计值的影响。检查将提供可接受的置信水平并产生一组在允许范围内的估计值的 FWD 测量值的数量。结果表明，该方法能够有效评价现有路面状况，提供合理的修复设计方法。 （TRRL）
This article describes a method of asphalt pavement structural analysis using falling weight deflectometer (FWD) measurements and the backcalculation of an elastic layered model. A non destructive testing method using a two mass type falling weight deflectometer mounted on a survey vehicle was used to obtain the deflection data. A backcalculation method was developed and a good relationship between layer modulus and equivalent layer coefficient was formulated. Elastic multi layer theory was adopted as a model of pavement structure. The backcalculation method minimises the errors between the measured FWD deflections and the calculated deflections and is based on the concept of non linear least square method. This method finds the set of layer moduli which corresponds best to the measured FWD deflections for various traffic classifications. In applying this system to in service pavement sections, the influence of errors in deflection measurement, layer thickness, and Poisson's ratio upon the estimated value must be taken into account. The number of FWD measurements which will provide an acceptable confidence level and which will yield a set of estimates within permissable ranges is examined. The results show that this method can effectively evaluate existing pavement condition and provide a reasonable rehabilitation design method. (TRRL)