Shear-Strength Model for Slab-Column Connections Subjected to Unbalanced Moment
- Authors
- Choi, Kyoung-Kyu; Shin, Dong-Woo; Park, Hong-Gun
- Issue Date
- May-2014
- Publisher
- AMER CONCRETE INST
- Keywords
- eccentric shear; footings; punching shear strength; slab-column connections; unbalanced moment
- Citation
- ACI STRUCTURAL JOURNAL, v.111, no.3, pp.491 - 502
- Journal Title
- ACI STRUCTURAL JOURNAL
- Volume
- 111
- Number
- 3
- Start Page
- 491
- End Page
- 502
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/10063
- ISSN
- 0889-3241
- Abstract
- A shear-strength model for slab-column connections without shear reinforcement was studied to predict the direct punching shear strength and the unbalanced moment-carrying capacity. Neglecting the shear contribution of a tension zone severely damaged by flexure-shear cracks, the punching shear at a critical section was assumed to be resisted mainly by the compression zone of the slab cross section. The shear strength of the compression zone was defined as a function of the compressive normal stress developed by the slab flexural action, using the material failure criteria of concrete. For the evaluation of the unbalanced moment-carrying capacity of the slab-column connections, eccentric shear strength was defined differently at each face of the critical section around the slab-column joint, considering the degree of flexural damage of the slab. For exterior slab-column connections, the proposed model was defined in the unsymmetrical critical section. The proposed model was applied to existing test specimens of interior and exterior slab-column connections, and column footings. The proposed strength model agreed well with test results.
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Collections - College of Engineering > School of Architecture > 1. Journal Articles
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