Comparing Repaired and Undamaged Specimens Test Results of Post-Tensioned Beam to Column Connections

Since, it is essential to provide homeless people by the
earthquake with safe, habitable accommodation repairing medium
and slight levels of damage at the connection parts should be
undertaken. In order to prove that a repaired connection was
sufficiently strong, a precast beam to column post tensioned
connection was tested in three phases. In phase one, the middle level
damage was observed at 6% drift at these connections. As a result of
the extra loads applied, little damage was observed. In the last phase,
the four connections tested in the first phase were repaired using
epoxy resin and then retested. The results from the tests on the
repaired precast and the undamaged specimens showed that the
repaired specimens were sufficiently strong, thus proving that repair
to damaged precast beam to column post tensioned connections can
be undertaken.


Authors:



References:
[1] Earthquake and Prefabrication. Prefabrication Conference, Istanbul;
2000.
[2] Blakeley, R.W.G. and, Park, R. Seismic Resistance of Pre-stressed
Concrete Beam-Column Assemblies. ACI Journal 1971; 68(9):677-692 .
[3] Blakeley, R.W.G. and, Park, R. Pre-stressed Concrete Sections with
Cyclic Flexure. Journal of the Structural Division Proceedings of the
American Society of Civil Engineers 1973;99(8):1717-1742.
[4] Park, R. and, Thompson, K.J. Cyclic Load Tests On Pre-stressed Beam
Column Joints. PCI Journal 1997; 22 (5):84-110.
[5] Priestly, M.J.N. and, Tao, J.R. Seismic Response of Pre-cast Pre-stressed
Concrete Frames With Partially Debonded Tendons. PCI Journal 1997;
38(1):58-68.
[6] Priestly, M.J.N. and, MacRae, J.R. Seismic Tests of Pre-cast Beam-tocolumn
Joint Subassemblages with Unbonded Tendons. PCI Journal
1996; 41(1):64-80.
[7] Cheok, G.S. and, Lew, H.S.Performance of Pre-cast Concrete Beam-to-
Column Connections Subject to Cyclic Loading. PCI Journal 1991;
36(3): 56-67.
[8] Cheok, G.S. and, Lew, H.S. Model Pre-cast Concrete Beam-to-Column
Connections Subject to Cyclic Loading. PCI Journal 1993; 38(4): 80-92.
[9] Cheok, G.S., Stanton, J.F., and Seagren D. Beam-to-column
Connections for Pre-cast Concrete Moment Resisting Frames.
Proceedings of the Fourth Joint Technical Coordinating Committee on
Pre-cast Seismic Structural Systems 1994; 90-107.
[10] Cheok, G.S., Stone, W.C., and Kunnath S. K. Seismic Response of Precast
Concrete Frames with Hybrid Connections. ACI Structural Journal
1998; 95(5):527-539.
[11] Stone, W.C., Cheok, G.S. and Stanton, J.F. Performance of Hybrid
Moment-Resisting Pre-cast Beam-Column Concrete Connections
Subjected to Cyclic Loading. ACI Journal1995; 92(2):229-249.
[12] Stone, W.C., Cheok, G.S., and Stanton, J.F. A Hybrid Reinforced Precast
Frame for Seismic Regions. PCI Journal 1997; 42(2):20-32.
[13] Priestly, M.J.N. The PRESS Program-Current Status and Proposed Plans
for Phase III. PCI Journal 1996; 41(2):22-40.
[14] Palmieri, L., Sagan, E., French, C., and Kreger, M. Ductile Connections
For Pre-cast Concrete Frame Systems. ACI Journal 1997;162(13):313-
355 .
[15] Nakaki, A.D., Stanton, J.F., and Sritharon, S. An Overview of the
PRESSS Five-Story Pre-cast Test Building. PCI Journal 1999; 44(2):26-
39.
[16] Priestly, M.J.N., Sritharon, S., Conley, J.R., and Pampanin, S.
Preliminary Results and Conclusions from the PRESSS Five-Story Precast
Test Building. PCI Journal 1999; 44(6):42-67.
[17] Kaya, M. Performance Analysis of Post-tensioning Beam to Column
Connections Under Cycling Loading in Prefabric Structures. Ph.D
Thesis, Gazi University, Ankara; 2007.
[18] Kaya M., Arslan A., Analytical Modeling Of Post-Tensioned Precast
Beam To Column Connections, Materials & Design, Materials & Design
2009, 30(2009): 3802-3811.
[19] Kaya M., Arslan A., The Effect of The Diameter of Pre-stressed Strands
Providing the Post-Tensioned Beam-to-Column Connections, Materials
& Design 2009, 30(7): 2604-2617.
[20] Kaya M., Arslan A., Effect of Stress Levels Applied to Pre-Stressed
Strands on Post-Tensioned Beam-to-Column Connections. The
Structural Design of Tall And Special Buildings 2012, 21(9), 682-698.
[21] Kaya M., Arslan A., Repair of The Damaged Post Tensioned Precast
Beam to Column Connections. The Structural Design of Tall And
Special Buildings 2012, 21(11), 844-854.
[22] http://www.sika.com.tr/pdf/products/1209451891_tr.pdf