Multi-axial dynamic constitutive model of ultra high performance concrete

Author(s): Zi-ruo Yu, Long-rui Li, Wen-yu Ji, Ming-zhe An, Yue Wang
Paper category: Proceedings
Book title: 1st International Conference on UHPC Materials and Structures
Editor(s): Caijun Shi and Dehui Wang
ISBN: 978-2-35158-164-3
e-ISBN: 978-2-35158-165-O
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 551-561
Total Pages: 11
Language: English

Abstract: As a new generation of sustainable concrete, ultra high performance concrete (UHPC)is appropriate for use in civilian and military engineering. Structures in these engineering are inevitably suffered from impact loadings of two or three directions. Therefore, it is necessary to investigate the multi-axial dynamic constitutive relation of UHPC. In this study, by getting dynamic enhancement factor, failure criterion of UHPC under dynamic loading was established based on the static failure model. After that, an uniaxial dynamic constitutive relation equation was established by added strain rate factor into uniaxial static constitutive relation equation of UHPC. Then a non-linearity index was adopted to modify the elastic modules of the three principal stress directions under multi-axial stress states. Finally, by weighted averaging the modified elastic modules, the equivalent uniaxial elastic module of UHPC under multi-axial stress states was obtained, and then the multi-axial dynamic constitutive model of UHPC was established. The results in this paper can help to make full use of ultra high performance of the material and improve the safety of UHPC structures.

Online publication: 2016
Publication type : full_text
Public price (Euros): 0.00