QQ客服 官方微博 反馈留言

	围压荷载下混凝土静动力强度的细观力学模型
	郑丹 ; 李庆斌 ; ZHENG Dan ; LI Qing-bin
	2010-06-10 ; 2010-06-10
关键词	混凝土 围压 动力强度 微裂纹 concrete confinement dynamic strength micromechanics micro crack TU528
其他题名	Micromechanics model for static and dynamic strength of concrete under confinement
中文摘要	本文从混凝土细观机理出发,采用翼型裂纹模型分析了围压荷载下混凝土内微裂纹扩展、弯折和相互作用直至材料破坏的过程。采用伪面力法计算了考虑相互作用的弯折扩展裂纹应力强度因子,并通过一些简化得到了显式的表达式。在假定混凝土的断裂韧度不随加载速率变化的前提下,分析和计算了不同围压荷载下的混凝土静动力强度,并与试验结果进行比较。结果表明,本文提出的模型能较好地反映围压荷载下混凝土的静动力特性和破坏机理。; The processes of propagation,kinking of micro cracks in concrete and the interaction among cracks as well as the induced failure are analyzed by using the model describing the wing type crack from the view point of micromechanics.The pseudo-force method is applied to calculate the compressive strength factor of the kinky propagated crack with the effect of interaction among cracks taken into account.On the assumption that the micro fracture toughness of concrete does not vary with strain rate,the static and dynamic strength of concrete under different confinements can be calculated.The comparison of calculation result with experimental data indicates that good agreement is achieved which implies that the model can be used to explain the rate-dependent properties of concrete in multiaxial stress state.; 国家自然科学基金资助项目(90210010); 重庆市教委自然科学基金资助项目(KJ060411)
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/59464]
专题	清华大学
推荐引用方式 GB/T 7714	郑丹,李庆斌,ZHENG Dan,等. 围压荷载下混凝土静动力强度的细观力学模型[J],2010, 2010.
APA	郑丹,李庆斌,ZHENG Dan,&LI Qing-bin.(2010).围压荷载下混凝土静动力强度的细观力学模型..
MLA	郑丹,et al."围压荷载下混凝土静动力强度的细观力学模型".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。