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

被引：46

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

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