Cyclic Response of Precast Bridge Piers with Novel Column-Base Pipe Pins and Pocket Cap Beam Connections
Publication: Journal of Bridge Engineering
Volume 21, Issue 4
Abstract
Prefabrication of structural elements is the integral part of accelerated bridge construction (ABC). Providing constructible beam-column and column-foundation connections that can tolerate inelastic cyclic deformations is the primary challenge for ABC in seismic regions. This study developed pipe pins to simulate hinge supports at the column-footing connections and pocket details to make moment connections between the columns and pier caps. The pipe pins consisted of two steel pipes to transfer the shear and one threaded rod to transfer the uplift forces. The pocket connection was formed by extending the column into a prefabricated pocket in a precast cap beam and grouting the space between the column segment and the pocket. The primary objectives of this research were to investigate (1) the seismic performance of the proposed connections, (2) the cyclic behavior of a two-column bent utilizing column-footing pipe pins at the base and pocket connections at the top joints, and (3) the performance of engineered cementitious composites (ECCs) in the pocket details and plastic hinge zone of column. Comprehensive experimental studies of the connections and their components, including cyclic load studies of a large-scale two-column bent model, were conducted. Test results showed that the proposed pipe pin detail resisted the force and deformation demands under high drift ratios with minimal damage. Furthermore, the precast cap beam remained essentially elastic, and the pocket detail behaved similarly to a monolithic moment connection in hinging the column when conventional concrete was used in the embedded region. Study results also recommend that ECC not be used in the embedded portion of the column in the pocket.
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Acknowledgments
The study presented in this article was funded by Caltrans under Grant No. 65A0423. The support of Caltrans research program manager, Mr. Peter Lee, is greatly appreciated. The authors also thank Dr. P. Laplace and Messrs. C. Lyttle, M. Lattin, M. Tazarv, M. Mehraein, and B. Nakashoji for their help in constructing and testing the test models.
References
Billington, S. L., and Yoon, J. K. (2004). “Cyclic response of unbonded posttensioned precast columns with ductile fiber-reinforced concrete.” J. Bridge Eng., 353–363.
Caltrans (California Dept. of Transportation). (2010). Seismic design criteria, Division of Engineering Services, Sacramento, CA.
Cruz Noguez, C., and Saiidi, M. (2013). “Performance of advanced materials during earthquake loading tests of a bridge system.” J. Struct. Eng., 144–154.
Doyle, K. A., and Saiidi, M. (2008). “Seismic response of telescopic pipe-pin connections.” Rep. No. CCEER-08-01, Center for Civil Engineering Earthquake Research, Dept. of Civil and Environmental Engineering, Univ. of Nevada, Reno, NV.
Haraldsson, O., Janes, T., Eberhard, M., and Stanton, J. (2013). “Seismic resistance of socket connection between footing and precast column.” J. Bridge Eng., 910–919.
Kavianipour, F., and Saiidi, M. (2013). “Shake table testing of a quarter-scale 4-span bridge with composite piers.” Rep. No. CCEER-13-17, Center for Civil Engineering Earthquake Research, Dept. of Civil and Environmental Engineering, Univ. of Nevada, Reno, NV.
Larosche, A., Cukrov, M., Sanders, D., and Ziehl, P. (2014a). “Prestressed pile to bent cap connections: Seismic performance of a full-scale three-pile specimen.” J. Bridge Eng., 04013012.
Larosche, A., Ziehl, P., ElBatanouny, M., and Caicedo, J. (2014b). “Plain pile embedment for exterior bent cap connections in seismic regions.” J. Bridge Eng., 04013016.
Mehrsoroush, A., and Saiidi, M. (2014). “Experimental and analytical seismic studies of bridge piers with innovative pipe pin column-footing connections and precast cap beams.” Rep. No. CCEER-14-07, Center for Civil Engineering Earthquake Research, Dept. of Civil and Environmental Engineering, Univ. of Nevada, Reno, NV.
Motaref, S., Saiidi, M., and Sanders, D. (2011). “Seismic response of precast bridge columns with energy dissipating joints.” Rep. No. CCEER-11-01, Center for Civil Engineering Earthquake Research, Dept. of Civil and Environmental Engineering, Univ. of Nevada, Reno, NV.
Motaref, S., Saiidi, M., and Sanders, D. (2014). “Shake table studies of energy-dissipating segmental bridge columns.” J. Bridge Eng., 186–199.
Saiidi, M. S., Cheng, Z., and Sanders, D. (2009). “An experimental study of two-way reinforced concrete column hinges under seismic load.” ACI Struct. J., 106(3), 340–348.
Wang, H., and Saiidi, M. (2005). “A study of RC columns with shape memory alloy and engineered cementitious composites.” Rep. No. CCEER-05-01, Center for Civil Engineering Earthquake Research, Dept. of Civil and Environmental Engineering, Univ. of Nevada, Reno, NV.
Zaghi, A., and Saiidi, M. (2011). “Bearing and shear failure of pipe-pin hinges subjected to earthquakes.” J. Bridge Eng., 340–350.
Zaghi, A., Saiid, S., and El-Azazy, S. (2011). “Shake table studies of a concrete bridge pier utilizing pipe-pin two-way hinges.” J. Bridge Eng., 587–596.
Zaghi, A. E., and Saiidi, M. (2010). “Seismic design of pipe-pin connections in concrete bridges.” Rep. No. CCEER-10-01, Center for Civil Engineering Earthquake Research, Dept. of Civil and Environmental Engineering, Univ. of Nevada, Reno, NV.
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© 2016 American Society of Civil Engineers.
History
Received: Dec 22, 2014
Accepted: Jul 14, 2015
Published online: Jan 4, 2016
Published in print: Apr 1, 2016
Discussion open until: Jun 4, 2016
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