Stress-strain models for ultra-high performance concrete (UHPC) and ultra-high performance fiber-reinforced concrete (UHPFRC) under triaxial compression

Zhang，S. S.1,2; Wang，J. J.1; Lin，Guan3; Yu，T.4; Fernando，D.5

2023-03-17

10.1016/j.conbuildmat.2023.130658

CONSTRUCTION AND BUILDING MATERIALS   Impact Factor & Quartile

0950-0618

1879-0526

The constitutive behavior of ultra-high performance concrete (UHPC) and ultra-high performance fiber reinforced concrete (UHPFRC) under multiaxial stresses, which has not been well understood, needs to be urgently investigated in order to meet an increasing demand for use of UHPC/UHPFRC in construction. This paper therefore presents an experimental study on the triaxial compressive behavior of UHPC and UHPFRC under triaxial compression. The compressive strengths of UHPC and UHPFRC in present study were up to 126.9 and 151.5 MPa, respectively. The test variables included the level of lateral hydraulic pressure, steel fiber volume fraction, and uniaxial compressive strength of UHPC and UHPFRC. The present experimental study provides the much-needed systematic test data on the triaxial compressive behavior of UHPC/UHPFRC. The test results showed that the lateral hydraulic pressure significantly enhanced both the strength and ductility of UHPC and UHPFRC. The presence of steel fibers had significant effects on the axial stress-axial strain behavior and the dilation behavior of UHPC and UHPFRC. Finally, new axial stress-axial strain models as well as a new equation for the axial strain-lateral strain relationship for UHPC and UHPFRC were first proposed.

Active confinement Concrete filled steel tube FRP-confined concrete Stress-strain model Triaxial compression UHPC UHPFRC

SCI

English

Others

National Natural Science Foundation of China[52078231] ; Key Research and Development Program of Hubei Province of China[2021BCA150] ; Hong Kong Research Grants Council[T22 -502/18-R]

Construction & Building Technology ; Engineering ; Materials Science

Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary

WOS:000946088800001

ELSEVIER SCI LTD

MATERIALS SCIENCE

2-s2.0-85148538166

Scopus

1.School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan,China
2.National Center of Technology Innovation for Digital Construction,Huazhong University of Science and Technology,Wuhan,China
3.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
4.Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Kowloon,Hung Hom,Hong Kong
5.School of Engineering,University of Edinburgh,Scotland,EH9 3FG,United Kingdom

Zhang，S. S.,Wang，J. J.,Lin，Guan,et al. Stress-strain models for ultra-high performance concrete (UHPC) and ultra-high performance fiber-reinforced concrete (UHPFRC) under triaxial compression[J]. CONSTRUCTION AND BUILDING MATERIALS,2023,370.

Zhang，S. S.,Wang，J. J.,Lin，Guan,Yu，T.,&Fernando，D..(2023).Stress-strain models for ultra-high performance concrete (UHPC) and ultra-high performance fiber-reinforced concrete (UHPFRC) under triaxial compression.CONSTRUCTION AND BUILDING MATERIALS,370.

Zhang，S. S.,et al."Stress-strain models for ultra-high performance concrete (UHPC) and ultra-high performance fiber-reinforced concrete (UHPFRC) under triaxial compression".CONSTRUCTION AND BUILDING MATERIALS 370(2023).