交变荷载与瞬态动水场耦合作用下水泥混凝土路面错台时空演化

项目名称： 交变荷载与瞬态动水场耦合作用下水泥混凝土路面错台时空演化

项目编号： No.51508064

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 建筑环境与结构工程学科

项目作者： 王威娜

作者单位： 重庆交通大学

项目金额： 20万元

中文摘要： 错台是水泥混凝土路面的典型病害。交变荷载与瞬态动水场耦合作用产生的基层细颗粒运动是错台形成的重要因素。现有研究尚未量化该耦合作用下细颗粒动态迁移细观作用行为及其对错台的影响，这制约了错台的精细化发展研究。.项目采用理论分析、模型试验和数值模拟方法展开研究：①开展路面板横向接缝处板底动水压力多尺度模型试验研究，构建瞬态动水压力数值模型，阐明瞬态动水场的冲刷作用；②基于接缝处板底基层微脱空区疲劳试验，建立基层细观损伤模型，量化交变荷载与瞬态动水场耦合作用下基层细观接触破坏行为；③试验分析基层微脱空区细颗粒迁移模式，构建基层细观时效变形模型，揭示交变荷载与瞬态动水场耦合作用对基层细观形变规律的影响；④试验研究基层细观力学响应与路面板时效变形机制，建立错台时空演化模型，揭示复杂应力耦合状态下错台多尺度时空演变规律。.预期成果可为水泥混凝土路面设计养护提供理论基础，有利于减少错台病害，具有应用价值。

中文关键词： 水泥混凝土路面；错台；交变荷载；瞬态动水场；时空演化

英文摘要： Faulting is a typical disease for concrete pavement. The coupling effects of alternating loads and transient hydrodynamic field leads the movement of fine particles. It is an important factor for pavement faulting. However, there is no quantified effect of fine particles movement for faulting in the past study and it has some bad effects on meticulous research for faulting development..Theoretical analysis, laboratory testing and numerical simulation methods are combined in the research. It consists a) testing multi-scale hydrodynamic dispersion in laboratory, establishing numerical model for transient hydrodynamic pressure, and presenting the erodible effect for hydrodynamic pressure; b) conducting fatigue testing for base micro-void area, establishing micro-mechanical damage model, quantifying the coupling effects of alternating loads and transient hydrodynamic field for base micro-deformation; c) characterizing migration patterns for fine particles in micro-void area based on laboratory test, establishing time-dependent deformation model for base, analyzing base micro-deformation influenced by the coupling of alternating loads and transient hydrodynamic field; d) presenting response mechanism of time-dependent deformation by testing, simulating temporal and spatial evolution for pavement faulting, and revealing its development..The outcomes are important for pavement design and maintenance. It is helpful for reducing pavement faulting and it is valuable.

英文关键词： concrete pavement;faulting;alternating load;transient hydrodynamic field;temporal and spatial development