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/lp/springer-journals/assessment-of-slab-column-connections-with-lattice-shear-reinforcement-pgcCaqqC8Q
- Publisher
- Springer Journals
- Copyright
- Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
- ISSN
- 2365-3159
- eISSN
- 2365-3167
- DOI
- 10.1007/s41024-022-00255-1
- Publisher site
- See Article on Publisher Site
Abstract
Lattice reinforcements are among the most effective means for shear strengthening of flat slabs. In this study, finite element (FE) analysis was used to evaluate the effect of various parameters on the punching shear response of flat slabs reinforced with lattice bars. Past numerical and experimental findings were first regarded for thorough calibration of the FE model. The model was then developed for representing 10 specimens that used various values of the considered model parameters. These parameters include concrete strength, shear reinforcement ratio, plan pattern of shear reinforcements and lattice bars’ shape height and angle. The distribution of strains and stresses at the failure stage showed that the lattice reinforcements could effectively prevent shear rupture and change it to a ductile flexural failure. The highest ductility was associated with an about 5.8% vertical drift and was achieved when the lattice reinforcements were extended about four times the slab thickness from the column face and had a height equal to the outer dimension of the longitudinal reinforcements. This deformation was about 4.6 times larger than the specimen without shear reinforcement. Meanwhile, the maximum strength reached around 1.26 times the unreinforced specimen when continuous shear reinforcements passing inside the column reinforcements were used.
Journal
Journal of Building Pathology and Rehabilitation – Springer Journals
Published: Jun 1, 2023
Keywords: Flat slab; Lattice reinforcement; Punching shear strength; Deformation capacity; Damaged plasticity model; Sensitivity assessment