Constitutive model of concrete creep damage considering the deterioration of creep parameters

doi:10.1016/j.conbuildmat.2021.125047

	Constitutive model of concrete creep damage considering the deterioration of creep parameters
	Liu, Wenbo 3,4; Zhou, Hui 3,4; Zhang, Shuguang 1,2; Jiang, Shuai 3,4
刊名	CONSTRUCTION AND BUILDING MATERIALS
	2021-11-15
卷号	308 页码:15
关键词	High-stress level Creep damage model Creep parameters Degradation law Concrete specimen
ISSN号	0950-0618
DOI	10.1016/j.conbuildmat.2021.125047
英文摘要	The MTS815.03 rock test system is used to carry out mechanical property and triaxial compression creep tests on concrete specimens of the same specification under different confining pressure conditions to study the creep characteristics of concrete structures in deep high-stress level areas. The relationship between the creep strain rate of the concrete specimen and the stress level and the creep characteristics of the concrete specimen in the high-stress level area are analyzed. Based on the establishment of a creep damage model in the high-stress level zone of a concrete specimen, a method for determining creep parameters is proposed on the basis of the characteristics of the creep test curve. The degradation law of creep parameters under different stress levels is analyzed, and the relationship between creep parameters and stress is constructed. Finally, the expressions between each creep parameter and stress are substituted into the creep damage model, and an improved creep damage model is obtained. The correctness of the established model is verified by comparing the test curve and the model curve. Result shows that the agreement between the established creep model curve and the accelerated test curve is higher than that between the traditional Nishihara model curve and the accelerated test curve. The established creep damage creep model can be used to predict the deformation trend of surrounding concrete over time after chamber or tunnel excavation and provide theoretical basis for concrete support and lining construction.
资助项目	Science and Technology Service Network Initiative of the Chinese Academy of Sciences[KFJSTS-QYZD-174] ; National Natural Science Foundation of China[41941018]
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000708129700005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28486]
专题	中科院武汉岩土力学所
通讯作者	Liu, Wenbo; Zhou, Hui
作者单位	1.Guilin Univ Technol, Sch Civil Engn, Guilin 541004, Peoples R China 2.Guangxi Key Lab Geomech & Geotech Engn, Guilin 541004, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Liu, Wenbo,Zhou, Hui,Zhang, Shuguang,et al. Constitutive model of concrete creep damage considering the deterioration of creep parameters[J]. CONSTRUCTION AND BUILDING MATERIALS,2021,308:15.
APA	Liu, Wenbo,Zhou, Hui,Zhang, Shuguang,&Jiang, Shuai.(2021).Constitutive model of concrete creep damage considering the deterioration of creep parameters.CONSTRUCTION AND BUILDING MATERIALS,308,15.
MLA	Liu, Wenbo,et al."Constitutive model of concrete creep damage considering the deterioration of creep parameters".CONSTRUCTION AND BUILDING MATERIALS 308(2021):15.