文献类型：期刊文献

英文题名：Crack extension resistance for a general three-point bending concrete beam

作者：Yin, Yangyang[1,3];Hu, Shaowei[2];Liang, Chaofeng[1,3];Sun, Yueyang[4]

机构：[1]Shaoxing Univ, Sch Civil Engn, Shaoxing 312000, Peoples R China;[2]Zhengzhou Univ, Yellow River Lab, Zhengzhou 450001, Peoples R China;[3]Shaoxing Univ, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Zhejiang, Peoples R China;[4]Suzhou Univ Sci & Technol, Sch Civil Engn, Suzhou 215011, Peoples R China

年份：2023

卷号：290

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：SCI-EXPANDED(收录号：WOS:001051718100001)、、EI(收录号：20233214492197)、Scopus(收录号：2-s2.0-85166480275)、WOS

基金：Acknowledgements This work was supported by the State Key Program of National Natural Science of China (52130901, 51739008) and the Natural Science Foundation of Zhejiang Province (LGF22E080035, LY20E080012) .

语种：英文

外文关键词：Concrete; Crack extension resistance; Three-point bending beam; Fracture process zone

外文摘要：Expressions of the crack extension resistance for a general three-point bending (TPB) concrete specimen were developed. Based on the proposed general expressions, the effects of span/height ratios on the fracture processes of TPB concrete beams were studied using two types of specimens, i.e. the beams with the same section but different spans and the beams with the same span but various heights. Results indicate that (1) the crack extension resistance curves (KR-curves) increased with the crack propagation. (2) The KR-curves and fracture process zone curves were not affected by the span/height ratios, i.e. the KR-curve can be considered as a criterion to describe the crack propagation in a structure. (3) The calculated crack tip opening displacement was not affected by the specimen span but increased with increasing the specimen height. (4) The stability analysis of crack propagation was also described based on the KR-curve.