Behavior of Beam-Column Connections under Axial Column Tension
Publication: Journal of Structural Engineering
Volume 122, Issue 5
Abstract
Recent analytical studies have shown that reduced column compression and even tension may be experienced by intermediate stories of medium to high-rise reinforced concrete (RC) structures. This is a consequence of high overturning moments coexisting with vertical ground motion. In recognition of such observations, the present study was initiated to investigate the seismic performance of interior beam-column subassemblages under reduced column compression or net tension. A state-of-the-art synchronized shake-table facility was used to test a total of six ordinary and marginal high-strength RC interior subassemblages. A nonconventional design approach was adopted to ensure pure panel-zone (PZ) shear failure, hence a realistic estimate of joint shear strength will ensue. Results indicated loss of shear capacity and increase in deformability when compression column load is markedly reduced or tension is experienced. Findings of this investigation are most useful in providing necessary information about the effect of axial tension on the PZ shear capacity, the joint confinement efficiency, and the overall structural stability in areas of potential high vertical earthquake excitations.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Abrahamson, N. A., and Lithehiser, J. J.(1989). “Attenuation of vertical peak acceleration.”Bull. Seismological Soc. of Am., 79(3), 549–580.
2.
Agbabian, M. S., Higazy, E. M., Abdel-Ghaffar, A. M., and Elnashai, A. S. (1994). “Experimental observations on the seismic shear performance of R/C beam-to-column connections subjected to varying axial column force.”Earthquake Engrg. and Struct. Dynamics, 23(8), 859–877.
3.
Alameddine, F., and Ehsani, M. R.(1991). “High-strength RC connections subjected to inelastic cyclic loading.”J. Struct. Engrg., ASCE, 117(3), 829–850.
4.
Goto, Y., Joh, O., and Shibata, T. (1988). “Influence of transverse reinforcement in beam ends and joints on the behavior of R/C beam-column subassemblages.”Proc., 9th WCEE, Tokyo/Kyoto, Japan, 4, 585–591.
5.
Higazy, E. M. (1993). “Seismic shear performance of beam-column subassemblages in multistory RC structures,” PhD dissertation, Civ. Engrg. Dept., Univ. of Southern California, Los Angeles, Calif.
6.
Koukleri, S. N. (1992). “The effect of vertical ground excitation on the response of R.C. structures,” MSc dissertation, Imperial Coll., Univ. of London, London, U.K.
7.
Minami, K., and Nishimura, Y.(1980). “Hysteretic characteristics of beam to column connections in steel reinforced concrete structures.”Proc., 7th WCEE, 7, 305–309.
8.
Paulay, T., and Priestley, M. J. N. (1992). Seismic design of reinforced concrete and masonry buildings . John Wiley & Sons, New York, N.Y.
9.
Tegos, I., Tsonos, A., and Penelis, G.(1992). “Seismic resistance of type 2 exterior beam-column joints reinforced with inclined bars.”ACI Struct. J., 89(1), 3–12.
10.
Uniform building code. (1988). Int. Conf. of Build. Officials, Whittier, Calif.
Information & Authors
Information
Published In
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: May 1, 1996
Published in print: May 1996
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.