Astaneh-Asl, Ph.D., P.E. (Principal Investigator)
Department of Civil
and Environmental Engineering
Sponsor: SAC Joint Venture Steel Project/ Federal Emergency Management Agency
Please send your comments to A. Astaneh-Asl at email@example.com
Shear Tab Connections,
Cyclic Behavior, Modeling and Seismic Design
A. Astaneh-Asl and J. Liu
University of California, Berkeley, California, USA
A series of 16 full scale tests of beam-column-floor slab subassemblies with shear connections were conducted at the University of California, Berkeley (1997-1999). The test specimens had shear tab, stiffened seat, top-and-bottom bolted angles, and bolted seat angles. The specimens were placed in a set-up shown below and subjected to ever-increasing cyclic drifts while the gravity load on the slab was kept constant. The results of cyclic tests were used to develop seismic design recommendations for modeling and design of these connections. Nonlinear dynamic Analyses of a number of prototype structures, with shear connections and floor slab, subjected to dynamic effects of seismic ground motions, were conducted. The results can be found in the Final Report of the Project..
An example of moment-rotation response of specimens (Specimen with 6 bolts connected to flange of the column.
The "Inelastic" moment-rotation model proposed for shear tabs to be used in Push-over analyses. Simpler "Elastic", "Elasto-Plastic" and "Bi-Linear" models were also proposed for design office applications. (See Final Report)
13-Astaneh-Asl,A., Liu, J.
and McMullin, K. M. (2002), "Behavior and Design of Single Plate Shear
Connections", Journal of Constructional Steel Research, 58, (2002)
12-Liu J, Astaneh-Asl A. Experimental and analytical studies of the cyclic behavior of simple connections in steel frame buildings. Final Report, Report No. UCB/CEE-STEEL-2000/01, Dept. of Civil and Env. Engrg., Univ. of California, Berkeley, 2000.( to purchase a copy of this report, please see above notes).
11-Liu, J. and Astaneh-Asl, A. (2000) "Cyclic Testing of Simple Connections, Including Effects of the Slab," J. of Structural Engineering, ASCE, Vol. 126, No. 1, pp. 32-39.
10-Liu, J. and Astaneh-Asl, A., (2000), "Cyclic behavior and seismic design of steel shear connections", Proceedings, International Workshop on Connections in Steel Structures IV, Roanoke, VA, October.
( To download a free PDF copy of this and other papers in the proceedings from AISC web page (www.aisc.org) please Click Here.)
09-Astaneh-Asl, A. and Liu, J., (2000), "Contributions of shear connections to seismic resistance of steel structures", Proceedings, The Fifth Conference on Tall Buildings in Seismic Regions, Los Angeles, May.
08-Liu, J. and Astaneh-Asl, A. (2000) "Cyclic behavior of steel shear connections with floor slab, " Proceedings, 6th ASCCS International Conference on Steel-Concrete Composite Structures, Los Angeles, CA.,
07-Liu, J. and Astaneh-Asl, A. (2000) "Cyclic testing on simple connections, including slab effects." Proceedings, North American Steel Construction Conference, Las Vegas, NV.
06-Liu, J. and Astaneh-Asl, A. (2000) "Seismic behavior and design of steel shear connections with floor slab," Proceedings, 12th World Conference on Earthquake Engineering, Auckland, New Zealand, January.
05-Liu, J. and Astaneh-Asl, A. (1999) "Cyclic behavior of steel shear connections including floor slab," Proceedings, 8th Canadian Conference on Earthquake Engineering, Vancouver, B.C.
04-Liu, J. and Astaneh-Asl, A., (1999) "Cyclic testing of simple connections, including slab effects; Volume 1: results of test series 'A'", Report No. UCB/CEE-STEEL-99/01, Dept. of Civil and Env. Engrg., Univ. of California, Berkeley
03-Liu, J. and Astaneh-Asl, A. (1998) "Experimental studies of seismic behavior of shear connections with floor slabs," Proceedings, SSRC Annual Technical Session & Meetings, Atlanta, GA.
02-Liu, J. and Astaneh-Asl, A., (1998) "Cyclic tests of shear connections including slab effects", Proceedings, World Structural Engineering Congress, ASCE, San Francisco, July.
01-Liu, J. and Astaneh-Asl, A. (1998) "Experimental studies of seismic behavior of shear connections with floor slabs," Proceedings, SSRC Annual Technical Session & Meetings, Atlanta, GA.
00. Astaneh-Asl, A., (1997), "Description of Work-Subtask 7.04:Studies and Cyclic Tests of Simple and PR Connections Including Slab Effects",lhProposal submitted to Sponsors: SAC Joint Venture Steel Project/FEMA (This publication is not in public domain).
Judy Liu and Abolhassan Astaneh-Asl
The research reported herein was conducted in the Department of Civil and Environmental Engineering of the University of California, Berkeley and was supported by the SAC Joint Venture Steel Project and the US Federal Government Federal Emergency Management Agency. Additional support was also provided by the Deaprtment of Civil and Environmental Engineeering. The opinions expressed here are those of the authors and do not necessarily reflect the views of the University of California, Berkeley, the Sponsors or other agencies and individuals whose names appear here.
The information presented here
has been prepared in accordance with recognized engineering principles and
is for general information only. While it is believed to be accurate, this
information should not be used or relied upon for any specific application
without competent professional examination and verification of its accuracy,
suitability, and applicability by a licensed professional engineer, designer
or architect. The publication of the material contained herein is not intended
as a representation or warranty on the part of any person or agency named
herein, that this information is suitable for any general or particular
use or of freedom from infringement of any patent or patents. Anyone making
use of this information assumes all liability arising from such use. Caution
must be exercised when relying upon specifications and codes developed by
others and incorporated by reference herein since such material may be modified
or amended from time to time subsequent to the posting of this material.
The authors bear no responsibility for such material other than to refer
to it and incorporate it by reference at the time of the initial posting
of this document.
Liu J, Astaneh-Asl A. Experimental
and analytical studies of the cyclic behavior of simple connections in steel
frame buildings. Final Report, Report No. UCB/CEE-STEEL-2000/01, Dept. of
Civil and Env. Engrg., Univ. of California, Berkeley, 2000.( to purchase
a copy of this report, please see above note