【作者】 赵隆茂； 马宏伟；

【Author】 Zhao longmao Ma Hongwei (Taiyuan University of Technology, Taiyuan, 030024)

【机构】 太原理工大学应用力学研究所；

【摘要】 本文主要报道了白云山机场跑道等用混凝土动态劈裂拉伸力学性能的实验研究。研究结果显示,随着撞击速度的提高,试件中应变率的增大,混凝土的动态抗拉强度和动态抗压强度都相应地有不同程度的增加,且都存在有一个临界应变率。无论是抗拉强度还是抗压强度,当应变率超过这一值后,强度都会有一个较大比例的增加。抗拉强度的临界应变率大约是2s-1;抗压强度的临界应变率大约是40s-1。当超过各自的临界应变率后,抗拉强度比抗压强度的增加比例要大得多。更多还原

【Abstract】 The investigation of dynamic splitting tensile experiment of concrete used in Baiyunshan airport is presented in this paper. It is found that the concrete is a rate-sensitive material and there is a critical strain rate beyond which large increases in strength occur. This critical strain rate is approximately 2s-1 for tension and approximately 40s-1 for compression. Beyond these critical strain rates, the tensile strength shows a larger percentage increase than the compressive strength.更多还原