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http://dx.doi.org/10.4334/JKCI.2010.22.4.585

Shear Strength Model for Slab-Column Connections  

Choi, Kyoung-Kyu (School of Architecture, Soongsil University)
Park, Hong-Gun (Dept. of Architecture, Seoul National University)
Kim, Hye-Min (School of Architecture, Soongsil University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.4, 2010 , pp. 585-593 More about this Journal
Abstract
On the basis of the strain-based shear strength model developed in the previous study, a strength model was developed to predict the direct punching shear capacity and unbalanced moment-carrying capacity of interior and exterior slab-column connections. Since the connections are severely damaged by flexural cracking, punching shear was assumed to be resisted mainly by the compression zone of the slab critical section. Considering the interaction with the compressive normal stress developed by the flexural moment, the shear strength of the compression zone was derived on the basis of the material failure criteria of concrete subjected to multiple stresses. As a result, shear capacity of the critical section was defined according to the degree of flexural damage. Since the exterior slab-column connections have unsymmertical critical sections, the unbalanced moment-carrying capacity was defined according to the direction of unbalanced moment. The proposed strength model was applied to existing test specimens. The results showed that the proposed method predicted the strengths of the test specimens better than current design methods.
Keywords
slab; slab-column connections; eccentric shear; unbalanced moment;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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