水泥混凝土路面板湿度梯度模拟与分析

发布时间：2018-01-25 05:34

本文关键词： 水泥混凝土路面湿度梯度外部干燥板底吸水自干燥等效温度梯度　出处：《工程力学》2014年08期 　论文类型：期刊论文

【摘要】：水泥混凝土路面板在湿度梯度影响下会发生翘曲变形,若与荷载耦合会导致早期结构性断裂。由于缺乏对混凝土路面板内部湿度梯度分布进行量化分析的有效方法,在路面设计中往往不考虑湿度梯度的影响,从而忽略了引起板早期破坏的一个重要因素。该文基于板内湿度分布是外界环境影响和混凝土内部自干燥的耦合作用结果,考虑水灰比、环境湿度和混凝土内部水分传输性质等影响因素,提出了混凝土板内湿度梯度定量分析方法,对典型情况下板内湿度梯度进行模拟,并与实测湿度数据比较。采用等效温度梯度ΔTe定量比拟湿度梯度,以分析其对板翘曲变形和应力的影响。研究结果可以为设计、铺筑长寿命路面提供参考依据。
[Abstract]:Under the influence of humidity gradient, the cement concrete pavement will warp and deform. Coupling with load will lead to early structural fracture. Due to the lack of an effective method for quantitative analysis of moisture gradient distribution in concrete pavement slab, the influence of humidity gradient is often not considered in pavement design. Therefore, an important factor that causes the early failure of the slab is neglected. Based on the fact that the moisture distribution in the plate is the result of the coupling effect of external environment and self-drying of concrete, the water-cement ratio is considered. In this paper, a quantitative analysis method of moisture gradient in concrete slabs is put forward, which is used to simulate the humidity gradient in concrete slabs under typical conditions. Compared with the measured humidity data, the equivalent temperature gradient 螖 Te is used to quantitatively compare the humidity gradient to analyze its influence on the warping deformation and stress of the plate. The results can be used for design. Paving long-life pavement provides reference basis.
【作者单位】：交通运输部公路科学研究院;清华大学土木工程系;
【基金】：国家自然科学基金项目(51108246) 交通运输部西部交通科技项目(2011318223710) 云南省交通厅科技项目(云交科2013(A)06,(C)02)
【分类号】：U416.216
【正文快照】： 混凝土材料以价格低廉、原材料丰富、性能出众而广泛应用于基础建设的各个部门和方向。尤其在道路工程中,水泥混凝土铺筑的路面以强度高、稳定性和耐久性好著称。但我国地域辽阔,气候条件复杂,受材料和环境的影响,水泥混凝土路面板在开放交通后常常出现早期破损,使其服务水平

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