Minimum specimen size for fracture parameters of site-casting dam concrete

被引：47

作者：

Guan, Junfeng ^{[1
,2
,3
]}

Li, Qingbin ^{[2
]}

Wu, Zhimin ^{[3
]}

Zhao, Shunbo ^{[1
]}

Dong, Wei ^{[3
]}

Zhou, Shaowu ^{[4
]}

机构：

[1] North China Univ Water Resources & Elect Power, Sch Civil Engn & Commun, Zhengzhou 450011, Peoples R China

[2] Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China

[3] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China

[4] China Three Gorges Corp, Beijing 100038, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 93卷

基金：

中国国家自然科学基金;

关键词：

Dam concrete; Site-casting; One-time pouring; Fracture parameters; Minimum specimen size; CRACK EXTENSION RESISTANCE; QUASI-BRITTLE FRACTURE; DOUBLE-K CRITERION; PROPAGATION; TOUGHNESS; ENERGY; PREDICTION; BEAMS; MODEL;

D O I：

10.1016/j.conbuildmat.2015.05.060

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents the minimum specimen size for experimental determination of the fracture parameters of site-casting dam concrete. Five series of wedge-splitting specimens for dam concrete with maximum aggregate size of 150 mm were tested, casting in the site of an actual super-high arch dam with its mixing tower system. The complete load-crack mouth opening displacement and load-crack tip opening displacement curves of the specimens were acquired. The fracture parameters, including fracture energy, effective fracture toughness, and critical crack tip opening displacement, were also obtained. Furthermore, the effect of specimen size on fracture parameters was discussed, and it was found that the minimum specimen size for determining the independent fracture parameters of the site-casting dam concrete should satisfy that ligament length is six times larger than the maximum aggregate size. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：973 / 982

页数：10

共 30 条

[1] A COMPARATIVE-STUDY OF FRACTURE PARAMETERS IN NOTCHED CONCRETE BEAMS [J].

ALEXANDER, MG ;

BLIGHT, GE .

MAGAZINE OF CONCRETE RESEARCH, 1988, 40 (142) :50-58

[2] Statistical prediction of fracture parameters of concrete and implications for choice of testing standard [J].

Bazant, ZP ;

Becq-Giraudon, E .

CEMENT AND CONCRETE RESEARCH, 2002, 32 (04) :529-556

[3] INFLUENCE OF LIGAMENT LENGTH AND STRESS STATE ON FRACTURE ENERGY OF CONCRETE [J].

BRAMESHUBER, W ;

HILSDORF, HK .

ENGINEERING FRACTURE MECHANICS, 1990, 35 (1-3) :95-106

[4]

Broz JJ, 1991, J MATER CIVIL ENG, V3, P235

[5]

CEB, 1993, CEB FIP MOD COD 1990

[6] A fracture mechanics-based method for prediction of cracking of circular and elliptical concrete rings under restrained shrinkage [J].

Dong, Wei ;

Zhou, Xiangming ;

Wu, Zhimin .

ENGINEERING FRACTURE MECHANICS, 2014, 131 :687-701

[7] On fracture process zone and crack extension resistance of concrete based on initial fracture toughness [J].

Dong Wei ;

Zhou Xiangming ;

Wu Zhimin .

CONSTRUCTION AND BUILDING MATERIALS, 2013, 49 :352-363

[8] Calculating crack extension resistance of concrete based on a new crack propagation criterion [J].

Dong, Wei ;

Wu, Zhimin ;

Zhou, Xiangming .

CONSTRUCTION AND BUILDING MATERIALS, 2013, 38 :879-889

[9] NUMERICAL CHARACTERIZATION OF THE NONLINEAR FRACTURE PROCESS IN CONCRETE [J].

GOPALARATNAM, VS ;

YE, BS .

ENGINEERING FRACTURE MECHANICS, 1991, 40 (06) :991-1006

[10]

[管俊峰 Guan Junfeng], 2014, [水力发电学报, Journal of Hydroelectric Engineering], V33, P152

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