The impact fracture characteristics of concrete slabs under different hammerhead shapes, impact velocities and concrete strengths

doi:10.1016/j.conbuildmat.2023.131919

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	The impact fracture characteristics of concrete slabs under different hammerhead shapes, impact velocities and concrete strengths
	Zhang, Qunlei ; Yuan, Ruifu ; Wang, Decai ; Feng C(冯春); Yue, Jinchao ; Sun, Lijun
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2023-08-15
卷号	392 页码:131919
关键词	Concrete slab Impact cracking CDEM Concrete strength Impact velocity Hammerhead shape
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2023.131919
英文摘要	To ensure the normal use of concrete slab structures, it is important to understand the impact fracture charac-teristics of concrete slabs. In this paper, the fracture processes of concrete slabs under different hammerhead shapes, impact velocities and concrete strengths are simulated based on a continuum-discontinuum element method (CDEM), and the fracture mechanisms of concrete slabs are discussed by analyzing the fracture forms, fracture degree, hammerhead stress and support reaction. The research results show that concrete slabs with lower tensile strength and larger cohesion easily generate bifurcation and unidirectional cracks due to impact tensile failure. However, concrete slabs with larger tensile strength and smaller cohesion are prone to generate dispersion cracks due to impact shear failure. As the tensile strength increases and the cohesive strength de-creases, the fracture degree of the concrete slab under impact loading increases from 0.00795 to 0.01434; however, the impact reaction of the support slab markedly decreases from 53,998 N to 47,636 N, which indicates the bearing performance of fracture concrete slab increases. With an increasing of impact velocity (3 similar to 5 m/s), the dynamic responses of concrete slab are more obvious, the final fracture degree of the concrete slab linearly increases from 0.00658 to 0.01587, the impact stress of the hammerhead obviously increases from 1.04e8 to 1.86e8 Pa, and the impact reaction linearly increases from 40,801 N to 57,432 N. For different impact velocities and concrete strengths, the hammerhead shapes also have a significant influence on concrete fracture. In conclusion, compared with the impact modes of square and circular hammers, rectangular hammer impact easily directionally fractures the concrete slab structures with different strengths.
分类号	一类
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
WOS记录号	WOS:001013536800001
资助机构	National Key Research and Development Program of China [2018YFC1505504] ; National Natural Science Foundation of China [52174109] ; Program for Innovative Research Team (in Science and Technology) in University of Henan Province [22IRTSTHN005] ; Key Research and Development Project of Henan Province [222102320407, 232102321130] ; Science and Technology Collaborative Innovation Special Project of Zhengzhou, Henan Province [2021212-15]
其他责任者	Wang, DC (corresponding author), North China Univ Water Resources & Elect Power, Sch Civil Engn & Commun, Zhengzhou 450045, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92581]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.{Zhang, Qunlei, Wang, Decai} North China Univ Water Resources & Elect Power, Sch Civil Engn & Commun, Zhengzhou 450045, Peoples R China 2.{Zhang, Qunlei, Yuan, Ruifu} Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo 454003, Peoples R China 3.{Feng, Chun} Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 4.{Yue, Jinchao} Zhengzhou Univ, Sch Water Conservancy & Environm, Zhengzhou 450001, Peoples R China 5.{Sun, Lijun} China Railway 14th Bur Grp Tunnel Engn Co LTD, Jinan 250000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qunlei,Yuan, Ruifu,Wang, Decai,et al. The impact fracture characteristics of concrete slabs under different hammerhead shapes, impact velocities and concrete strengths[J]. CONSTRUCTION AND BUILDING MATERIALS,2023,392:131919.
APA	Zhang, Qunlei,Yuan, Ruifu,Wang, Decai,冯春,Yue, Jinchao,&Sun, Lijun.(2023).The impact fracture characteristics of concrete slabs under different hammerhead shapes, impact velocities and concrete strengths.CONSTRUCTION AND BUILDING MATERIALS,392,131919.
MLA	Zhang, Qunlei,et al."The impact fracture characteristics of concrete slabs under different hammerhead shapes, impact velocities and concrete strengths".CONSTRUCTION AND BUILDING MATERIALS 392(2023):131919.