Size effect on tensile strength of lightweight aggregate concrete: A numerical investigation

被引：13

作者：

Liu, Yang ^{[1
]}

Wu, Tao ^{[1
]}

Wei, Hui ^{[1
]}

Liu, Xi ^{[1
]}

Pan, Yi ^{[1
]}

机构：

[1] Changan Univ, Sch Civil Engn, Xian, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2022年 / 323卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Lightweight aggregate concrete; Size effect; Mesoscopic simulation; Tensile strength; PLASTIC-DAMAGE MODEL; COMPRESSIVE STRENGTH; MECHANICAL-PROPERTIES; MICROSTRUCTURE; DURABILITY; FRACTURE; PLAIN;

D O I：

10.1016/j.conbuildmat.2022.126541

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Lightweight aggregate concrete (LWAC) showed an obvious brittleness when subjected to the tensile stress, and the related size effect issue was crucial for the analysis and design of structural LWAC. The random aggregate structure was used to establish finite element models, and materials parameters were calibrated by using existing test data. Influences of the ratio of water-to-binder (W/B) materials, grading of lightweight aggregate (LWA), the strength of LWA and the relative strength of interfacial transitional zone on the tensile strength and the size effect of LWAC were evaluated. Finally, the results of simulations were applied to conduct a regression analysis on classical size effect law. It was concluded that the grading of LWA had a relatively more minor influence on the size effect of LWAC in tension, while the W/B ratio and the strength of LWA significantly affected the size effect due to the alteration of the concrete strength. Formulas for parameters in classical size effect law were developed by using the results of numerical analysis.

引用

页数：11

共 34 条

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