Comparison of Seismic Behaviors of Interior Joints in PT and RC Flat Plate Systems


Article Preview

The purpose of this study is to compare the seismic behaviors of interior post-tensioned (PT) and reinforced concrete (RC) flat plate slab-column connections designed to resist only gravity loads. In general, flat plate systems have been used to support gravity loads, which should be constructed with lateral system such as shear walls or moment frames. Flat plate systems should retain the ability to undergo the lateral drift associated with the lateral system without loss of gravity load carrying capacity. Although these systems are common, relatively little experimental study has been conducted to assess actual behavior under lateral loads. Therefore, this study was undertaken to assess the seismic performance of two PT and one RC slab-column interior connection under high gravity loads. This study observed that PT connections had a better seismic performance than corresponding RC connections in terms strength, deformability, energy absorption.



Key Engineering Materials (Volumes 348-349)

Edited by:

J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel




Y. M. Park et al., "Comparison of Seismic Behaviors of Interior Joints in PT and RC Flat Plate Systems", Key Engineering Materials, Vols. 348-349, pp. 741-745, 2007

Online since:

September 2007




[1] American Cincrete Institute (ACI): Building Code Rrequirements for Structural Concrete (ACI 318-05) and Commentary (318R-05). Farmington Hills, Michigan, (2005).

[2] T. H. -K. Kang and J. W. Wallace: Punching of Reinforced and Post-tensioned Concrete SlabColumn Connections. ACI Structural Journal, Vol. 103, No. 4(2006), pp.531-540.


[3] A. N. Qaisrani: Interior Post-tensioned Flat-plate Connections Subjected to Vertical and Biaxial Lateral Loading. University of California, Berkeley, Phd thesis, 1993, pp.1-354.

[4] Midas IT. MIDAS/GENw User's Manual. Version 6. 3. 2, Seoul, Korea, (2004).

[5] Joint ACI-ASCE Committee 352: Recommendation for Design of Slab-column Connections in Monolithic Reinforced Concrete Structures(ACI 352. 1R-89). Farmington Hills, Michigan, 1989. 0 0. 1 0. 2 0. 3 0. 4 0. 5 0. 6 0. 7 0. 8 0. 9 1 Gravity shear ratio( Vg / Vc, = 1 ) 0.









08 Drift ratio at punching Present Study (PT) Present Study (RC) PT-Int. RC-Int. ACI 318-05 Limit Best fit of PT conn. Best fit of RC conn. φφ Fig. 4 Gravity shear ratio vs. drift ratio at punching (Interior slab-column connection).