干旱区生态环境知识资源中心(Arid): 低应变率下沙漠砂混凝土动态力学性能及本构模型

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	低应变率下沙漠砂混凝土动态力学性能及本构模型
其他题名	The dynamic constitutive model and mechanical behaviors of desert sand concrete at low strain rate
	张明虎; 刘海峰; 马映昌; 车佳玲
来源期刊	应用力学学报
ISSN	1000-4939
出版年	2020
卷号	37 期号:5
中文摘要	为研究沙漠砂混凝土动态力学性能,利用电液伺服万能试验机进行不同沙漠砂替代率下沙漠砂混凝土动态压缩试验;分析沙漠砂替代率和应变率对沙漠砂混凝土动态抗压强度和强度增强因子的影响,探讨低应变率下沙漠砂混凝土动态破坏模式;在非线性热黏弹性本构模型(ZWT模型)基础上,建立沙漠砂混凝土动态本构模型。研究表明:沙漠砂混凝土具有率相关性,随着应变率增大,沙漠砂混凝土动态抗压强度和强度增强因子逐渐增加;保持应变率不变,沙漠砂替代率为0%的沙漠砂混凝土强度增强因子最小;随着沙漠砂替代率增加,沙漠砂混凝土动态抗压强度呈现先增大后减小的趋势,沙漠砂替代率为40%时,沙漠砂混凝土动态抗压强度最大。
英文摘要	In order to research on the dynamic mechanical behaviors of desert sand concrete, the dynamic compressive tests of desert sand concrete with different desert sand substitution ratios were carried out by electro-hydraulic servo universal testing machines. The effects of desert sand substitution ratio and strain rate on the dynamic compressive strength and stress enhancement factor of desert sand concrete are analyzed. The failure mode of desert sand concrete at low strain rate is discussed. The dynamic constitutive model of desert sand concrete is established on the basis of nonlinear thermal viscoelastic constitutive model (ZWT model). The test results show that with the enhancement of strain rate,the dynamic compressive strength and stress enhancement factor of desert sand concrete increase, which shows that the desert sand concrete is rate-dependent. With the same strain rate,the stress enhancement factor of desert sand takes the minimum value when desert sand substitution ratio amounts to 0%. With increase of the desert sand substitution ratio, the dynamic compressive strength of desert sand concrete increases firstly, and then decreases. When desert sand substitution ratio reaches 40%, the dynamic compressive strength of desert sand concrete takes the maximum value.
中文关键词	沙漠砂混凝土 ; 低应变率 ; 沙漠砂替代率 ; 动态抗压强度 ; 强度增强因子
英文关键词	desert sand concrete low strain rate desert sand substitution ratio dynamic compressive strength stress enhancement factor
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Mechanics
CSCD记录号	CSCD:6829740
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353965
作者单位	张明虎, 宁夏大学土木与水利工程学院, 银川, 宁夏 750021, 中国. 刘海峰, 宁夏大学土木与水利工程学院, 银川, 宁夏 750021, 中国. 马映昌, 宁夏大学土木与水利工程学院, 银川, 宁夏 750021, 中国. 车佳玲, 宁夏大学土木与水利工程学院, 银川, 宁夏 750021, 中国.
推荐引用方式 GB/T 7714	张明虎,刘海峰,马映昌,等. 低应变率下沙漠砂混凝土动态力学性能及本构模型[J]. 宁夏大学,2020,37(5).
APA	张明虎,刘海峰,马映昌,&车佳玲.(2020).低应变率下沙漠砂混凝土动态力学性能及本构模型.应用力学学报,37(5).
MLA	张明虎,et al."低应变率下沙漠砂混凝土动态力学性能及本构模型".应用力学学报 37.5(2020).