Shear
Tab Connections Abolhassan
Astaneh-Asl, Ph.D., P.E. (Principal Investigator) Department
of Civil and Environmental Engineering Sponsors: AISC and RCSC Please send your comments to A. Astaneh-Asl at astaneh@ce.berkeley.edu |
Shear Tab Connections,
Behavior and Design
A. Astaneh-Asl, K.M. McMullin, S.M. Call,
K. Porter, A. Shaw
University of California, Berkeley, California, USA
This project conducted during 1988-1991 period had four distinct but interrelated phases. In each phase, a certain type of shear tab connection was studied, their behavior established through full-scale testing and design procedures were developed and proposed. The design procedures form the basis of current AISC Manual procedures and tables for design of shear tab connections. The four phases were:
1. Shear tab connections with standard holes welded to column flange (A. Astaneh-Asl, K. McMullin, S. Call).
2. Shear tab connections with slotted holes welded to column flange(A. Astaneh-Asl, K. Porter).
3. Shear tab connections with standard holes connected to beam web. (A. Astaneh-Asl and A. Shaw).
4. Shear tab connections with standard or slotted holes connected to column web side (A. Astaneh-Asl).A series of 17 full scale tests of shear tab connections to columns or web of beams were conducted at the University of California, Berkeley (1988-91). The test specimens had shear tabs with standard or short slotted holes connected to the flange or web side of columns or to the web of girders. Shear tabs with 3, 5,7 and 9 bolts in one row were tested. The specimens were placed in a setup shown below and subjected to realistic ever-increasing shear force and corresponding rotations. The results of monotonic the tests were used to develop a performance-based design procedure that will ensure that the connection not only has the shear strength to carry the applied load but also has sufficient ductility to accommodate the rotational demand on the connection by the beam's end.
The results can be found in the publications on this project listed below.
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10-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)
pp.1121-1141.
09-Astaneh-Asl, A. (1992) "Design
of Column Web Single Plate Shear Connections", Manuscript, Department
of Civil and Environmental Engineering, Univ. of California, Berkeley.
08-Shaw,
A. L. and Astaneh-Asl, A.(1992). "Experimental study of single-plate
steel beam-to-girder connections." Report No. UCB/SEMM - 92/13, Department
of Civil Engineering, University of California, Berkeley, May.
07-Porter, K. A. and Astaneh-Asl, A.(1990). "Design of single plate
shear connections with snug-tight bolts in short slotted holes." Report
No. UCB/SEMM - 90/23, Department of Civil Engineering, Univ. of California,
Berkeley, April.
06-Astaneh-Asl, A., Call, S.M. and McMullin, K.M. (1990) "Design of
Single Plate Shear Connections", Steel TIPS Report, Structural Steel
Educational Council, Moraga, CA.
05-Astaneh-Asl, A., Call, S.M., and
McMullin, K.M. (1989), "Design of Single Plate Shear Connections,"
Engineering Journal AISC, Vol. 26, 1st Quarter, pp. 21-32.
04-Astaneh-Asl, A., (1989), "Demand and Supply of Ductility in Steel
Shear Connections," Journal of Constructional Steel Research, 14, (1989).
03-Astaneh, A. (1989). "New concepts in design of single plate shear
connections." Proceedings, National Steel Construction Conf., AISC,
Nashville.
02-Call,
S.M. and Astaneh-Asl, A.(1989). "Behavior of single plate shear connections
with A325 and A490 bolts." Report No. UCB/SEMM - 89/04, Department
of Civil Engineering, University of California, Berkeley, April.
01-Astaneh-Asl, A., McMullin, K. M., Call, S. M.(1988). "Design of
single-plate framing connections." Report No. UCB/SEMM - 88/12, Department
of Civil Engineering, University of California, Berkeley, July.
00- Astaneh-Asl, A. (1988) "Tests of Shear Tabs and Development of
Design Procedures", Proposal submitted to the AISC.(this publication
is not in public domain).
RESEARCH TEAM AND ACKNOWLEDGEMENTS
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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 AISC and RCSC. 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.
( to purchase a copy of these
reports, please see above note
under "Publications").
-Shaw,
A. L. and Astaneh-Asl, A.(1992). "Experimental study of single-plate
steel beam-to-girder connections." Report No. UCB/SEMM - 92/13, Department
of Civil Engineering, University of California, Berkeley, May.
-Porter, K. A. and Astaneh-Asl, A.(1990). "Design of single plate shear
connections with snug-tight bolts in short slotted holes." Report No.
UCB/SEMM - 90/23, Department of Civil Engineering, Univ. of California,
Berkeley, April.
-Call,
S.M. and Astaneh-Asl, A.(1989). "Behavior of single plate shear connections
with A325 and A490 bolts." Report No. UCB/SEMM - 89/04, Department
of Civil Engineering, University of California, Berkeley, April.
-Astaneh-Asl, A., McMullin, K. M., Call, S. M.(1988). "Design of single-plate
framing connections." Report No. UCB/SEMM- 88/12, Department
of Civil Engineering, University of California, Berkeley, July.
06-Astaneh-Asl, A., Call, S.M. and McMullin, K.M. (1990) "Design of Single Plate Shear Connections", Steel TIPS Report, Structural Steel Educational Council, Moraga, CA. (a copy of this report can be downloaded for personal used free of charge from aisc web site: www.aisc.org