湿筛二级配大坝混凝土双轴动态受压特性试验

发布时间：2018-06-04 03:11

本文选题：湿筛混凝土 + 双轴压缩　；参考：《混凝土》2017年01期

【摘要】：研究湿筛混凝土在双轴动态受压荷载作用下的动态力学特性,建立湿筛混凝土双轴动态受压强度准则。利用大型液压伺服静、动态三轴试验设备,对150 mm×150 mm×150 mm湿筛二级配大坝混凝土立方体试件进行等比例双轴动态受压加载试验,应变速率为10~(-5)~10~(-2) s~(-1)。湿筛混凝土双轴动态受压强度及动态弹性模量随应变速率的增大而提高,湿筛混凝土双轴受压强度的动态增长幅度与水工大骨料混凝土相当,均高于相同条件下的普通混凝土。通过对试验数据的拟合,得到湿筛混凝土双轴动态强度准则,为大体积混凝土结构进行非线性分析、探索动态强度机理提供数据支持和依据。
[Abstract]:The dynamic mechanical properties of wet screen concrete under biaxial dynamic compression loading are studied and the dynamic compressive strength criterion of wet screen concrete under biaxial compression is established. Using a large hydraulic servo static and dynamic triaxial test equipment, the concrete cube specimens of the 150 mm 脳 150 mm wet sieve secondary distribution dam are subjected to the equal proportion biaxial dynamic compression loading test. The biaxial dynamic compressive strength and dynamic elastic modulus of wet screen concrete increase with the increase of strain rate. The dynamic growth range of biaxial compressive strength of wet screen concrete is equal to that of hydraulic aggregate concrete, which is higher than that of ordinary concrete under the same conditions. Through fitting the test data, the biaxial dynamic strength criterion of wet sieve concrete is obtained, which provides data support and basis for nonlinear analysis of mass concrete structure and exploration of dynamic strength mechanism.
【作者单位】：大连海洋大学土木工程学院;大连理工大学海岸与近海工程国家重点试验室;
【基金】：国家自然科学基金项目(51079019) 辽宁省教育厅科学研究一般项目(L2015080)
【分类号】：TV431

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