基于Φ75mm SHPB系统的高温混凝土动态力学性能研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (17) : 12-17.

论文

基于Φ75mm SHPB系统的高温混凝土动态力学性能研究

王宇涛，刘殿书，李胜林, 江雅勤

作者信息 +

Study the dynamic mechanical property of concrete based on Φ75mm SHPB system under high temperature conditions

Wang Yu-Tao，Liu Dian-Shu，Li Sheng-Lin，Jiang Ya-Qin

Author information +

文章历史 +

摘要

运用Φ75mm大直径SHPB及高温加热试验系统，对工程中常用的C30、C50、C60和C70四种强度等级的混凝土在不同温度条件下（常温、150℃、300℃、450℃、600℃）进行冲击压缩试验。试验结果表明：四种强度等级的混凝土均表现出明显的温度效应，随着温度的升高，混凝土动态破坏强度不断降低，动态破坏应变不断增大；当温度达到600 ℃时，动态破坏强度已和混凝土强度等级关系不大；同时，在高温下四种强度混凝土均出现塑性流动现象且随着温度的升高越来越明显，韧性越来越强。

Abstract

Impact experiments for the commonly used kinds of concrete in engineering, such as C30, C50 and C60 and C70, are performed on split Hopkinson pressure bar(SHPB) equipment with a large diameter of Φ75 mm and high temperature heat test system under different temperature conditions (room temperature, 150 ℃, 300 ℃, 450 ℃, 600 ℃). The results showed that the four kinds of strength grade of concrete are showed obvious temperature effect, with the increase of temperature, decrease of dynamic damage of concrete strength, the dynamic failure strain increasing; When the temperature reached 600 ℃, the dynamic fracture strength and concrete strength grade is less; At the same time, the four kinds of strength of concrete at high temperature have the phenomenon of plastic flow and this phenomenon is more and more obvious and toughness is more and more strong with the increasing of temperature.

导出引用

王宇涛;刘殿书;李胜林;江雅勤. 基于Φ75mm SHPB系统的高温混凝土动态力学性能研究[J]. 振动与冲击, 2014, 33(17): 12-17

Wang Yu-Tao;Liu Dian-Shu;Li Sheng-Lin;Jiang Ya-Qin. Study the dynamic mechanical property of concrete based on Φ75mm SHPB system under high temperature conditions[J]. Journal of Vibration and Shock, 2014, 33(17): 12-17