Influence of water content on dynamic compressive properties of concrete subjected to seismic strain rate

被引：0
|
作者：
Wang H. [1 ]
Yin W. [1 ]
Cheng X. [2 ]
Sheng Y. [2 ]
Sun X. [1 ]
机构：
[1] College of Civil Engineering and Architecture, Zhejiang University, Hangzhou
[2] College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2019年 / 50卷 / 02期
关键词：
Concrete; Mechanical properties; Multi-parameter analysis; Strain rate; Water content;
D O I：
10.13243/j.cnki.slxb.20181012
中图分类号：
学科分类号：
摘要：
To clarify the influence of water contents on the mechanical properties of concrete subjected to seismic strain rate, a vacuum water-saturated equipment was used to prepare concrete specimens with different water contents rapidly. The effect of cement secondary hydration on the rest results can be minimized by this method. Uniaxial compression tests were carried out at strain rates of 10-5, 10-4 and 10-3 s-1. The effects of strain rate and water content on the stress-strain curves, compressive strength, elastic modulus and critical strain of concrete are analyzed. The obtained results show that the compressive strength and elastic modulus increase with the increase of strain rate, while the critical strain of concrete decreases. At a same strain rate, increasing water content lowers the compressive strength, but increase the dynamic increase factor under dynamic loading. Critical strain decreases more significantly with the increase of water content especially at higher strain rates. Empirical formula for the mechanical properties of concrete are proposed in this study considering the effect of strain rate as well as the water content, which has a good agreement with the test results. © 2019, China Water Power Press. All right reserved.
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页码：225 / 232
页数：7
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