Uniaxial tensile response and tensile constitutive model of ultra-high performance concrete containing coarse aggregate (CA-UHPC)

Uniaxial tensile response and tensile constitutive model of ultra-high performance concrete containing coarse aggregate (CA-UHPC)

Shi, Z. (TU Delft Steel & Composite Structures; Tongji University)
Su, Q. (Tongji University; Shanghai Engineering Research Center of High Performance Composite Bridges)
Kavoura, Dr. Florentia (TU Delft Steel & Composite Structures)
Veljkovic, M. (TU Delft Steel & Composite Structures)

2023

To establish the tensile constitutive model of ultra-high performance concrete containing coarse aggregate (CA-UHPC), monotonic and cyclic uniaxial tensile tests for CA-UHPC with fiber volume fractions of 2.5% and 2.0% were conducted. Test results showed that CA-UHPC exhibits approximately linear stress-strain relation up to the tensile strength, and tensile softening response composed of the smeared- and localized-cracking stages, regardless of the tested fiber contents. Based on the monotonic test data, the tensile stress-crack opening model of CA-UHPC was established, and the model was further simplified into tri-linear relation. Based on the cyclic test results, tensile damage evolution laws according to the strain equivalence principle and the energy equivalence principle were developed, respectively. Finally, the proposed tensile constitutive model and the calibrated tensile damage evolution laws were demonstrated to effectively predict the mechanical response of CA-UHPC members under both monotonic tension and cyclic tension through numerical simulations.

CA-UHPC
dog-bone-shaped specimen
uniaxial tensile test
tensile stress-crack opening model
tensile damaga variable
finite element model

http://resolver.tudelft.nl/uuid:9a764d0f-3f7d-4dd7-97a6-0cf2641304c7

https://doi.org/10.1016/j.cemconcomp.2022.104878

2023-07-01

0958-9465

Cement and Concrete Composites, 136

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2023 Z. Shi, Q. Su, Dr. Florentia Kavoura, M. Veljkovic