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以蒙特卡罗方法随机生成高透水混凝土骨料、孔隙模型,并用ANSYS的APDL参数化设计语言编程进行实现,对高透水混凝土抗压破坏过程进行了仿真计算分析。对椭圆型或圆形骨料而言,高透水混凝土的抗压破坏过程基本是沿孔隙与界面间的薄水泥石破坏开始,向四周延伸,当水泥石和界面破坏到一定程度,骨料开始破坏,此时结构失稳,试件将失去承受荷载能力。对研究高透水混凝土破坏机理有一定的参考价值。 相似文献
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A comprehensive investigation was performed for repairing the different types of cracks appearing on the surface or inside
the concrete lining at various depths. The material properties used in grouting and two methods for crack repair were discussed
in details, and consequently reliable repair measures were proposed and implemented. It is a better choice to adopt the hole-drilling
method for the relatively regular crack. The grouting pressure should not be too high and it is generally between 0.4∼0.6
MPa. For the second time grouting, the pressure maybe increased to 0.8 MPa. Other method is the pasting nozzles method which
is more suitable for irregular cracks such as cracks with intensive density and crossing cracks. Its grouting pressure is
generally between 0.6∼1.0 MPa. The in-situ tests in Three Gorges Project demonstrate favorably the feasibility and applicability
of the proposed methods for crack repair within the lining concrete.
Supported by the National Natural Science Foundation of China (10602049) 相似文献
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试验分析了高透水混凝土强度随着龄期变化的增长规律,拟合出其变化曲线,提出早期养护方法对其强度增长的必要性。并对高透水混凝土的抗压强度与劈裂强度进行了试验分析,指出二者有较强的相关性。为分析研究高透水混凝土性能具有一定的参考价值。 相似文献
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采用有限元方法对观音港电排站进行了三维渗流的数值分析,采用材料与水的特性曲线在分析过程中给出了非饱和区渗透系数和饱和度的确定方法,并给出了材料吸水、干燥过程的确定方法.分析结果充分说明了电排站前池底板翻砂鼓水的原因,为进一步对电排站前池底板的锚固提供了科学的数据分析,同时也说明了该非饱和区渗透系数和饱和度确定方法正确性. 相似文献