Browse > Article
http://dx.doi.org/10.4334/JKCI.2008.20.4.523

The Failure Model of RC Flat Plates Considering Interrelation between Punching Shear and Unbalanced Moment  

Choi, Jung-Wook (KCI Research Center, Korea Concrete Institute)
Song, Jin-Kyu (School of Architecture, Chonnam National University)
Song, Ho-Beom (School of Architecture, Chonnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.20, no.4, 2008 , pp. 523-530 More about this Journal
Abstract
In structural design provision, maximum punching shear stress of slabs is prescribed as combined stress in direct shear occurred by gravity load and eccentric shear occurred by unbalanced moment. This means that the effect of unbalanced moment is considered to decide the punching shear stress. However, from the resistance capacity standpoint, the effect of unbalanced moment strength is not considered for deciding punching shear strength. In this paper, a model considering interrelation between unbalanced moment and punching shear was proposed. In the model, the relation between load effect and resistance capacity in unbalanced moment and punching shear was two-dimensionally expressed. Using the interrelation model, a method how unbalanced moment strength should be considered to decide the punching shear strength was proposed. Additionally, effective width enlargement factors for deciding the unbalanced moment strength of flat plates with shear reinforcements were proposed. The interrelation model proposed in this paper is very effective for the prediction of the behavior of slab-column connection because not only punching shear and unbalanced moment strengths but also failure modes of flat plates can be accurately predicted.
Keywords
flat plate structures; punching shear; unbalanced moment; interrelation model; failure modes;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 ACI-ASCE Committee 352, "Recommendations for Design of Slab-Column Connections in Monolithic Reinforced Concrete Structures," ACI Structural Journal, American Concrete Institute, 1988, pp. 675-696
2 한국콘크리트학회, 2007년도 개정 콘크리트구조설계기준 해설, 한국콘크리트학회, 2007, pp. 163, 192, 198, 200, 269
3 Elgabry, A. A. and Ghali, A., "Tests on Concrete Slab-Column Connections with Stud-Shear Reinfor cement Subjected to Shear-Moment Transfer," ACI Structural Journal, Vol. 84, No. 5, 1987, pp. 433-442
4 Pan, A. D. and Moehle, J. P., "An Experimental Study of Slab-Column Connections," ACI Structural Journal, Vol. 89, No. 6, 1992, pp. 626-638
5 Islam, S. and Park, R., "Tests on Slab-Column Connections with Shear and Unbalanced Flexure," Journal of Structure Division, ASCE, Vol. 102, No. 3, pp. 549-568
6 Robertson, I. N., Kawai, T., Lee, J., and Enomoto, B., "Cyclic Testing of Slab-Column Connections with Shear Reinforcement," ACI Structural Journal, Vol. 99, No. 5, 2002, pp. 605-613
7 Robertson, L. N. and Durrani, A. J., "Gravity Load Effect on Seismic Behavior of Interior Slab-Column Connections," ACI Structural Journal, Vol. 89, No. 1, 1992, pp. 37-45
8 최정욱, 송진규, 김준희, "슬래브-기둥 접합부의 펀칭강도 및 횡변위 성능에 관한 반복 횡하중 실험", 한국구조물진단학회지, 11권, 4호, 2007, pp. 99-108
9 ATENA MANUAL, Cervenka Consulting, 2001
10 ACI-ASCE Committee 421, "Shear Reinforcement for Slabs," ACI Structural Journal, American Concrete Institute, 1999, pp. 421.1R-6
11 최정욱, 송진규, 박홍근, 김준희, "전단 보강된 무량판-기둥 접합부의 횡저항 성능," 대한건축학회논문집 구조계, 23권, 9호, 2007, pp. 47-54
12 ACI Committee 318, Building Code Requirements for Structural Concrete and Commentary, ACI 318-05 and ACI-318R- 05, American Concrete Institute, Farmington Hills, MI, 2005. pp. 159, 183, 189, 190, 225