Two 3/5-scale models of bonded post-tensioned slab-column connections, one without drop panel and one with drop panel, were tested to failure. The study's goals were to: (1) develop information on the seismic performance of typical bonded post-tensioned slab-column connections; and (2) improve the seismic performance using a drop panel. A lateral quasi-static cyclic loading routine, simulating earthquake actions, was applied to the models' top columns. Overall performance was examined and compared in terms of lateral load-carrying capacity, maximum drift, stiffness, energy absorption, and failure mechanism. Relevant design equations suggested by ACI 318–08 Building Code provisions for preventing stress-induced and deformation-induced failures as well as previous similar tests by others were compared with test results. Results indicate that ACI provisions could be used for these connections, and the presence of a drop panel is an effective way to greatly enhance the overall performance of this type of connection.
ACI-ASCE Committee 423 (1974). “Tentative recommendations for prestressed concrete flat plates”, ACI Journal, Vol. 67, No. 2, pp. 61–71.
2.
ACI Committee 318 (1995). Building Code Requirements for Structural Concrete (ACI 318–95) and Commentary, American Concrete Institute, Farmington Hills, MI, USA.
3.
ACI Committee 318 (2002). Building Code Requirements for Structural Concrete (ACI 318–02) and Commentary, American Concrete Institute, Farmington Hills, MI, USA.
4.
ACI Committee 318 (2008). Building Code Requirements for Structural Concrete (ACI 318–08) and Commentary, American Concrete Institute, Farmington Hills, MI, USA.
5.
ACI Committee 374 (2005). Acceptance Criteria for Moment Frames Based on Structural Testing and Commentary (ACI 374.1–05), American Concrete Institute, Farmington Hills, MI, USA.
6.
ATC (1996). Seismic Evaluation and Retrofit of Concrete Buildings, Report No. 96–01, Seismic Safety Commission, California, USA.
7.
CloughR.W. and PenzienJ. (1993). Dynamics of Structures, 2nd Edition, McGraw Hill Inc., New York, USA.
8.
DovichL.M. and WightJ.K. (2005). “Effective slab width model for seismic analysis of flat slab frames”, ACI Structural Journal, Vol. 102, No. 6, pp. 868–875.
9.
HawkinsN.M. and MitchellD. (1979). “Progressive collapse of flat-plate structure”, ACI Structural Journal, Vol. 76, No. 7, pp. 775–809.
10.
HawkinsN.M. (1981). “Lateral load resistance of unbonded post-tensioned flat plate construction”, PCI Journal, Vol. 26, No. 1, pp. 94–116.
11.
HuesteM.D. and WightJ.K. (1999). “A nonlinear punching shear failure model for interior slab-column connections”, Journal of Structural Engineering, ASCE, Vol. 125, No. 9, pp. 997–1008.
12.
KangT.H.K. and WallaceJ.W. (2006). “Punching of reinforced and post-tensioned concrete slab-column connections”, ACI Structural Journal, Vol. 103, No. 4, pp. 531–540.
13.
LuoY.H. and DurraniA.J. (1995). “Equivalent beam model for flat-slab buildings – part I: Interior connections”, ACI Structural Journal, Vol. 92, No. 1, pp. 115–124.
14.
MegallyS. and GhaliA. (2000). “Punching shear design of earthquake-resistant slab-column connections”, ACI Structural Journal, Vol. 97, No. 5, pp. 720–730.
15.
MoehleJ.P. (1996). Seismic Design Considerations for Flat-Plate Construction, ACI SP-162, Mete A. Sozen Symposium, Farmington Hills, USA.
16.
MitchellD.AdamsJ.DevallR.H.LoR.C. and WeichertD. (1986). “Lessons from the 1985 Mexican earthquake”, Canadian Journal of Civil Engineering, Vol. 13, No. 5, pp. 535–557.
17.
NewmarkN.M. and HallW.J. (1982). Earthquake Spectra and Design, Earthquake Engineering Research Institute, Berkeley, California, USA.
18.
PanA.P. and MoehleJ.P. (1988). Reinforced Concrete Flat Plates under Lateral Loading: An Experimental Study Including Biaxial Effects, Report UCB/EERC-88/16, Earthquake Engineering Research Center, University of California – Berkeley, California, USA.
19.
PanA.P. and MoehleJ.P. (1989). “Lateral displacement ductility of reinforced concrete flat plates”, ACI Structural Journal, Vol. 86, No. 3, pp. 250–258.
20.
PanA.P. and MoehleJ.P. (1992). “An experimental study of slab column connections”, ACI Structural Journal, Vol. 89, No. 6, pp. 626–638.
21.
PongpornsupS. (2003). Seismic Performance of Post-Tensioned Interior Flat Slab-Column Connections, Master Thesis, Asian Institute of Technology, Thailand.
22.
PrawatwongU. (2012). Seismic Performance of Bonded Post-Tensioned Interior Slab-Column Connections with and without Drop Panel, PhD Thesis, Asian Institute of Technology, Thailand.
23.
QaisraniA.N. (1993). Interior Post-Tensioned Flat-Plate Connections Subjected to Vertical and Biaxial Lateral Loading, PhD Thesis, Department of Civil Engineering, University of California-Berkeley, California, USA.
24.
RobertsonI.N. and DurraniA.J. (1992). “Gravity load effect on seismic behavior of interior slab-column connections”, ACI Structural Journal, Vol. 89, No. 1, pp. 37–45.
25.
SmithS.W. and BurnsN.H. (1974). “Post-tensioned flat plate to column connection behavior”, Journal of the Prestressed Concrete Institute, Vol. 19, No. 3, pp. 74–91.
26.
TrongthamN. and HawkinsN.M. (1977). Moment Transfer to Columns in Unbonded Post-Tensioned Prestressed Concrete Slabs, Report SM77–3, Department of Civil Engineering, University of Washington-Seattle, Seattle, Washington, USA.
27.
TandianC.H. (2006). Seismic Performance of Bonded Post-Tensioned Interior Flat Slab-Column Connections with Drop Panel, Master Thesis, Asian Institute of Technology, Thailand.
28.
WeyE.H. and DurraniA.J. (1992). “Seismic response of interior slab-column connections with shear capitals”, ACI Structural Journal, Vol. 89, No. 6, pp. 682–691.
