不同龄期混凝土动态力学性能研究

发布时间：2018-04-21 22:35

本文选题：混凝土 + 峰值应力　；参考：《长江科学院院报》2015年12期

【摘要】：对不同龄期(28,112,183,345,810,1 248,1 550d)的混凝土进行了不同应变速率(10~(-5),5×10~(-5),10~(-4),5×10~(-4),10~(-3),5×10~(-3),10~(-2)/s)下的单轴压缩试验,试件尺寸为Φ150 mm×300 mm,研究了龄期和加载速率对混凝土的力学性能影响。结果表明:1在同一龄期下,混凝土的峰值应力随着应变速率增长而增大;在同一应变速率下,混凝土的峰值应力随着龄期的增长而增大,800d后峰值应力趋于稳定;2在同一应变速率下,混凝土的吸能能力随着龄期的增长而增加,表现出了峰值应力与龄期之间相似的规律。
[Abstract]:The uniaxial compression tests of concrete of different ages (2811218334581010 1 24810d) with different strain rate (1010mm) -550d were carried out. The effect of age and loading rate on the mechanical properties of concrete was studied by uniaxial compression test under the condition of 10112184581010 (1010mm 脳 300mm). The effect of age and loading rate on the mechanical properties of concrete was studied in this paper. The test results show that the compressive strength of concrete is 150 mm 脳 300 mm in diameter and the effect of age and loading rate on the mechanical properties of concrete is studied in this paper. The results show that the compression test is carried out under the condition of different age (2811218334581010) and the size of the specimen is 桅 150mm 脳 300mm. The results show that the peak stress of concrete increases with the increase of strain rate at the same age, and increases at the same strain rate at the same strain rate. The peak stress of concrete increases with the increase of age. After 800 days, the peak stress tends to stabilize. At the same strain rate, the energy absorption capacity of concrete increases with the increase of age, showing a similar law between peak stress and age.
【作者单位】：三峡地区地质灾害与生态环境湖北省协同创新中心;三峡大学土木与建筑学院;
【基金】：国家自然科学基金项目(51279092) 三峡大学研究生科研创新基金项目(CX2014010);三峡大学自主探索基金项目;三峡大学培优基金项目(2015PY018)
【分类号】：TU528

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