Static and cyclic compressive behaviours of ultra-high performance concrete in cold regions

The stress–strain behaviours of ultra-high performance concrete (UHPC) at varying temperatures are fundamental information for the design and numerical analysis of cold-region structures using UHPC. To obtain the stress–strain relationship and damage evolution of UHPC at low temperatures, a series of low-temperature compression tests were conducted. A total of 21 UHPC cubes and 26 prisms were tested under compression to evaluate the influences of temperatures (T = 20, −30, −60, and − 80 °C), height-to-width ratios (H/B = 1 and 3), and loading conditions (monotonic and cyclic). The test results revealed that the cubic/prism ultimate compressive strength (fcuT or fcT), modulus of elasticity (EcT), and peak strain (ε0T) under monotonic and cyclic compression increased with the decreasing T within 20∼ −80 °C. As T decreased from 20 to −80 °C, the fcuT, fcT, EcT, and ε0T of UHPC under monotonic loading increased by 30.8%, 56.7%, 16.5%, and 15.8%, respectively. The low-temperature increasing rate on EcT and ε0T were very close, but significantly lower than that of compressive strength. In addition, the decreasing T did not affect the plastic strain, stress deterioration ratio, endpoint strain, and stiffness degradation ratio of UHPC under cyclic loading. Through the regression analysis of experimental results, the low-temperature monotonic and cyclic stress–strain constitutive models were developed and validated. The validations against test results showed that the proposed models provided reasonable predictions on monotonic and cyclic σ-ε behaviours of UHPC at low temperatures.

• Record URL:
  • https://doi.org/10.1016/j.coldregions.2023.103937
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0165232X23001672
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0165232X
• Supplemental Notes:
  • © 2023 Elsevier B.V. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Kang, Er-Cong
  • Xie, Jian
  • Yan, Jia-Bao
• Publication Date: 2023-9

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 103937
• Serial:
  • Cold Regions Science and Technology
  • Volume: 213
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0165-232X
  • Serial URL: https://www.sciencedirect.com/science/journal/0165232X?sdc=2

Subject/Index Terms

• TRT Terms: Compressive strength; Frigid regions; Repeated loads; Static loads; Ultra high performance concrete
• Subject Areas: Bridges and other structures; Highways; Materials;

Filing Info

• Accession Number: 01891592
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 28 2023 9:34AM