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Geomechanics and Engineering Volume 32, Number 1, January15 2023 , pages 69-84 DOI: https://doi.org/10.12989/gae.2023.32.1.069 |
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Nonlinear shear-flexure-interaction RC frame element on Winkler-Pasternak foundation |
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Suchart Limkatanyu, Worathep Sae-Long, Nattapong Damrongwiriyanupap, Piti Sukontasukkul,
Thanongsak Imjai, Thanakorn Chompoorat and Chayanon Hansapinyo
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| Abstract | ||
| This paper proposes a novel frame element on Winkler-Pasternak foundation for analysis of a non-ductile reinforced concrete (RC) member resting on foundation. These structural members represent flexural-shear critical members, which are commonly found in existing buildings designed and constructed with the old seismic design standards (inadequately detailed transverse reinforcement). As a result, these structures always experience shear failure or flexure-shear failure under seismic loading. To predict the characteristics of these non-ductile structures, efficient numerical models are required. Therefore, the novel frame element on Winkler-Pasternak foundation with inclusion of the shear-flexure interaction effect is developed in this study. The proposed model is derived within the framework of a displacement-based formulation and fiber section model under Timoshenko beam theory. Uniaxial nonlinear material constitutive models are employed to represent the characteristics of non-ductile RC frame and the underlying foundation. The shear-flexure interaction effect is expressed within the shear constitutive model based on the UCSD shear-strength model as demonstrated in this paper. From several features of the presented model, the proposed model is simple but able to capture several salient characteristics of the non-ductile RC frame resting on foundation, such as failure behavior, soil-structure interaction, and shear-flexure interaction. This confirms through two numerical simulations. | ||
| Key Words | ||
| flexure-shear critical members; shear-flexure interaction; soil-structure interaction; Timoshenko frame element; Winkler-Pasternak foundation | ||
| Address | ||
| Suchart Limkatanyu: Department of Civil and Environmental Engineering, Faculty of Engineering, Prince of Songkla University, Songkhla 90110, Thailand Worathep Sae-Long, Nattapong Damrongwiriyanupap and Thanakorn Chompoorat: 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 | ||