拱坝梯度控裂理论与方法

发布时间：2018-04-30 06:44

  本文选题：拱坝 + 梯度理论　； 参考：《水力发电学报》2017年11期

【摘要】：拱坝的开裂与控制仍是目前设计、施工与运行中的技术难点。通过对拱坝中结构应力裂缝、温度裂缝、特殊部位裂缝及基础坝块裂缝等现象的观察与分析,揭示了拱坝工程温度、应力、变形和刚度的梯度致裂机理。从拱坝结构应力梯度、混凝土坝块内外温度梯度、材料功能梯度、基础坝块抬动梯度等问题出发,提出了将梯度作为一种衡量状态或控制因素的梯度控制理论体系。从时间、空间、功能等多维度分解问题,形成了多物理量场的多维度梯度控裂方法体系。为拱坝的可靠设计、可控建设和安全运行提供关键理论和技术支撑。
[Abstract]:The cracking and control of arch dam are still the technical difficulties in design, construction and operation. Through the observation and analysis of structural stress cracks, temperature cracks, special site cracks and foundation dam block cracks in arch dams, the gradient cracking mechanism of temperature, stress, deformation and stiffness of arch dams is revealed. Starting from the stress gradient of arch dam structure, the temperature gradient inside and outside concrete dam block, the material function gradient, the lifting gradient of foundation dam block and so on, a gradient control theory system is put forward, which takes gradient as a measure of state or control factor. The multi-dimensional gradient crack control method system is formed from the multi-dimensional decomposition of time, space, function and so on. It provides key theoretical and technical support for reliable design, controllable construction and safe operation of arch dam.
【作者单位】： 清华大学水沙科学与水利水电工程国家重点实验室;中国长江三峡集团公司;
【基金】：国家自然科学基金(51339003;51279087) 清华大学自主科研项目(20161080079)
【分类号】：TV642.4
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本文编号：1823500