Static and dynamic mechanical properties of concrete after high temperature treatment

被引：0

作者：

机构：

[1] School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing

[2] The Nuclear Northwest Construction Group Co., Ltd., Xian

来源：

Liu, Dian-Shu | 1600年 / Chinese Vibration Engineering Society卷 / 33期

关键词：

Concrete; Damage; Dynamic mechanics performance; High temperature treatment; SHPB; Static mechanics performance;

D O I：

10.13465/j.cnki.jvs.2014.20.004

中图分类号：

学科分类号：

摘要：

With the help of the high temperature heating system, concretes with two kinds of strength grades of C30 and C50 were tested respectively under different temperature conditions of uniform heating and after natural cooling. A Φ75 mm SHPB experiment device, ultrasonic measurement technology and test press were used to carry out dynamic impact and static compression tests of concrete specimens before and after high temperature treatment. The experimental results show that: with the increase of temperature, the vertical wave speed, static compressive strength and elastic modulus decrease to different degrees, but their overall trends are consistent. Damage increases with the temperature increasing and the temperatures of 400℃ and 700℃ are the turning points of its obvious change. After different high temperature cooling, the dynamic damage strength of concrete decreases, but the peak of strain increases. The stress-strain curve becomes smoother and the plastic flow phenomenon appears. This phenomenon becomes more and more obvious with the rising of temperature.

引用

页码：16 / 19and39

页数：1923

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