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Structural Engineering and Mechanics Volume 96, Number 2, October25 2025 , pages 139-153 DOI: https://doi.org/10.12989/sem.2025.96.2.139 |
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Composite damage modeling of recycled aggregate concrete beam on Winkler-Pasternak foundations: A multiphase mechanical approach |
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Suchart Limkatanyu, Worathep Sae-Long, Nattapong Damrongwiriyanupap, Piti Sukontasukkul, Tanakorn Phoo-Ngernkham, Chayanon Hansapinyo, Tosporn Prasertsri and Panumas Saingam
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| Abstract | ||
| This paper proposes a new recycled aggregate concrete (RAC) beam model on a foundation that incorporates damage. The damage models are derived based on composite damage mechanics, considering three phases: cement paste, recycled concrete aggregate (RCA), and nano inclusions. Three damage models are used to represent damage in the RAC beam: the Voigt parallel model, the Reuss serial model, and the generalized self-consistent model. The Voigt parallel model represents the upper bound responses, while the lower bound responses are represented by the Reuss serial model. The beam model is developed using the virtual displacement principle, with the kinematic assumption based on Euler-Bernoulli beam theory. The Winkler-Pasternak foundation model is employed to account for the interaction between the beam and foundation. Two numerical simulations were conducted to investigate the effects of damage and system parameters on static bending analysis. Both simulations reveal that damage parameters lead to a degradation of system stiffness, resulting in increased beam deflection. Conversely, the foundation parameters increase system stiffness, leading to a reduction in beam deflection. | ||
| Key Words | ||
| composite materials; damage model; Euler-Bernoulli beam theory; generalized self-consistent model; Pasternak foundation; three-phase damage model | ||
| Address | ||
| Suchart Limkatanyu: Department of Civil and Environmental Engineering, Faculty of Engineering, Prince of Songkla University, Songkhla 90110, Thailand Worathep Sae-Long: Civil Engineering Program, School of Engineering, University of Phayao, Phayao 56000, Thailand Nattapong Damrongwiriyanupap: Civil Engineering Program, School of Engineering, University of Phayao, Phayao 56000, Thailand Piti Sukontasukkul: Construction and Building Materials Research Center, Department of Civil Engineering, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand Tanakorn Phoo-Ngernkham: Department of Civil Engineering, Faculty of Engineering and Technology, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand Chayanon Hansapinyo: Excellence Center in Infrastructure Technology and Transportation Engineering, Department of Civil Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand Tosporn Prasertsri: Department of Civil Engineering, Faculty of Engineering and Architecture, Rajamangala University of Technology Tawan-ok, Bangkok 10330, Thailand Panumas Saingam: Department of Civil Engineering, School of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand | ||