梯度非均质路面结构力学行为分析及参数反演研究

项目名称： 梯度非均质路面结构力学行为分析及参数反演研究

项目编号： No.50808077

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 建筑科学

项目作者： 颜可珍

作者单位： 湖南大学

项目金额： 20万元

中文摘要： 沥青路面结构在温度及老化等因素影响下面层结构性质为梯度非均质变化。本项目首先通过室内外试验结合有关研究成果建立温度或老化引起的面层材料的梯度模式；采用有限元法研究了基于梯度模量材料的路面结构的力学行为；分析了不同梯度路面结构的力学特性；结合断裂力学理论对梯度非均质路面结构进行断裂和疲劳分析。提出了基于蚁群算法的路面结构模量反算方法；采用谱元法研究了动荷载作用下路面等层状结构的动力响应特性；分析了动荷载及路面结构参数等对动力响应的影响。研究成果可为沥青路面结构设计及分析提供参考与借鉴。

中文关键词： 梯度非均质；沥青路面；蚁群算法；有限元；参数反演

英文摘要： Asphalt pavement structure under the influence of many factors such as temperature and aging ,etc., the nature of the surface structure changes for gradient non-homogeneous. First of all, this project combines indoor and outdoor test results of relevant studies to establish the gradient model of the surface material caused by the aging or temperatue;The finite element method has been adopted in researching the mechanical behavior of the pavement structure based on the gradient modulus material; The mechanical propeties of the different gradient pavement structure is analyzed; And the research combines with the theory of fracture mechanics of fracture and fatigue analysis of gradient non-homogeneous pavement structure. In this study, the pavement structure modulus inverse calculation method based on ant colony algorithm is proposed; Spectral element method is used to study the dynamic response characteristics of pavement the equal layered structure. The impact of dynamic loads and pavement structural parameters, etc., on dynamic response is analyzed. The research results can provide information and reference for the asphalt pavement structure design and anaysis.

英文关键词： gradient non-homogeneous; asphalt pavements;ant colony algorithm;finite element method;paramenters inversions.