Constitutive model for ultra-high performance concrete (UHPC) considering the size effect under cyclic compressive loading

被引：17

作者：

Zhang, Xiaochen ^{[1
]}

Lu, Ya ^{[1
]}

Wu, Xiangguo ^{[2
,3
]}

Wang, Puyan ^{[4
]}

Li, Ran ^{[5
]}

Liu, Yang ^{[6
]}

Shen, Chao ^{[7
]}

Zhang, Heming ^{[7
]}

Zhang, Dong ^{[2
]}

机构：

[1] Harbin Inst Technol, Sch Civil Engn, Harbin 150001, Peoples R China

[2] Fuzhou Univ, Coll Civil Engn, Fujian Provincial Key Lab Multidisasters Prevent &, Fuzhou 350108, Peoples R China

[3] Harbin Inst Technol, Key Lab Smart Prevent & Mitigat Civil Engn Disaste, Key Lab Struct Dynam Behav & Control, Minist Ind & Informat Technol,Minist Educ, Harbin 150090, Peoples R China

[4] Ningbo Elect Power Design Inst Co Ltd, Ningbo 315000, Peoples R China

[5] China Acad Bldg Res Co Ltd, Beijing 100013, Peoples R China

[6] CGN New Energy Holiding Co Ltd, Heilongjiang Branch, Harbin 150090, Peoples R China

[7] Shanghai Fengling Renewables Co Ltd, Shanghai, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 368卷

基金：

中国国家自然科学基金;

关键词：

Ultra-high performance concrete; Cyclic compressive loading; Constitutive model; Size effect; SHEAR-STRENGTH; BEHAVIOR;

D O I：

10.1016/j.conbuildmat.2023.130499

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, the size effect of the thickness of the specimen on the mechanical properties of UHPC was investigated through compression tests under cyclic loading. UHPC prisms with different thicknesses from 20 mm to 100 mm were tested under unloading/reloading cycles and the stress-strain curves were recorded for this purpose. A constitutive model to predict the stress-strain response of UHPC accounting for the thickness was proposed. It was found that UHPC specimens with different thicknesses showed the same failure mode of di-agonal shear failure. The size effect of thickness was significant for the compressive strength but was negligible for the peak strain and elastic modulus. The damage of the unloading modulus and reloading modulus at zero stress only occurred when the unloading strain exceeded 0.8 times the peak strain. Furthermore, the proposed constitutive model could predict the stress-strain response for UHPC with different thicknesses under cyclic compressive loading with acceptable accuracy.

引用

页数：11

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