Friction-Slip Connections for Moment Frames with Continuous Beams

Document Type : Research Article

Authors

University of Tehran, Tehran

Abstract

This paper presents an assessment on a friction-slip connection for moment frames
with continuous beams based on the current detail. It also proposes a new configuration
for rigid connections in moment frames with continuous beams, which
can be developed as a friction-slip connection. In conventional moment frames,
beams are placed between two adjacent columns and connected to the column
flanges faces. However, in moment frames with continuous beams, two beams are
continuously passed next to the column. In the existing practice for connections in
these frames, two vertical connection plates placed on column flanges, and the
beams are connecting to these plates via their wings. In the mentioned detail, it was
assumed that the load transfers with in-plane action between connection plates
and column; therefore, the design force is pure shear, and based on the design
procedure, it should have been able to be developed for a friction-slip connection.
However, the results showed that the out-of-plane action of RPLs could be significant;
although this action provides extra capacity in moment connections, it
is not desirable in friction connections due to changes in the developed forces
in pretension bolts. Based on this action, a locking occurs, which changes the
performance of the connection considerably. As an alternative to this detail, a new
configuration is proposed in this paper, which can also be used as a friction-slip
connection and provides a friction connection in moment frames with continuous
beams. In new detail, by eliminating the effect of connection plate thickness, the
friction joint works as expected. Thus, instead of the plastic behavior of structural
elements, these friction joints can be used as an energy-dissipating system.

Keywords


1. Karami, R. (1992) Study of Rigidity Khorjini
Connections. Sharif University of Technology,
Department of Civil Engineering.
2. Asghari, S. (1999) Exper imental Study of
Khorjini Connections. Amirkabir University of
Technology, Department of Civil and Environmental
Engineering.
3. Sadeghian, P. (1999) Analytical Study of Khorjini
Connections. Sharif University of Technology,
Department of Civil Engineering.
4. Mirghaderi, S. and Dehghani Renani, M. (2008)
The rigid seismic connection of continuous beams
to column. Journal of Constructional Steel
Research, 64, 1516-1529.
5. Dehghani Renani, M. and Mirghaderi, R. (2006)
The new details of rigid connection. Proceedings
of First European Conference on Earthquake
Engineering, Geneva.
6. Dehghani, M. (2001) Analytical and Experimental
Studies of Khorjini Beam to Column
Connections and New Detail of Rigid
Connection. School of Civil Engineering,
University of Tehran.
7. Chancellor, N.B., Eatherton, M.R., Roke D.A.,
and Akbas, T. (2014) Self- Centering seismic
lateral force resisting systems: high performance
structures for the city of tomorrow. Buildings,
520-548.
8. Christopoulos, C. Tremblay, R., Kim, H., and
Lacerte, M. (2008) Self-centering energy dissipative
bracing system for the seismic resistance
of structures: Development and validation.
Journal of Structural Engineering, 134(1),
96-107.
9. Shahini, M., Sabbagh, A.B., Davisdon P., and
Mirghaderi, R. (2019) Development of coldformed
steel moment- resisting connections with
bolting friction- slip mechanism for seismic
applications. Thin- Walled Structures, 141, 217-
231.
10. Roke, D.A. Sause, R., Ricles, J.M., and
Chancellor, N.B. (2010) Damage-Free Seismic-
Resistant Self-Center ing Concentr ically-
Braced Frames. ATLSS Report No. 10-09,
Bethlehem.
11. Ricles, J. Sause, R. Garlock, M., and Zhao, C.
(2001) "Posttensioned seismic-resistant connections
for steel frames. Journal of Structural
Engineering, 127(2), 113-121.
12. Wolski, M.E. (2006) Experimental Evaluation
of a Bottom Flange Friction Device for a Self
Centering Seismic Moment Resistant Frame
with Post-Tensioned Steel Moment Connections,
M.S. Thesis, Dept. of Civil and
Environmental Eng., Lehigh University,
Bethlehem, PA.
13. Nabid, N., Hajirasouliha, I., and Petkovski, M.
(2019) Adaptive low computational cost
optimisation method for Performance- based
seismic design of friction dampers. Engineering
Structures, 198.
14. Grondin, G., Jin, M., and Josi, G. (2008) Slip
critical bolted connections- a reliability analysis
for design at ultimate limit state. University of
Alberta.
15. Nester, E. (1966) Influence of variation of the
contact area upon the slip resistance of a bolted
joint. Lehigh University.
16. Kuperus, A. (1996) The Ratio between the Slip
Factor of Fe 52 and Fe 37. Delf University of
Technology.
17. Allan, R. and Fisher, J. (1968) Bolted joints with oversized and slotted holes. Journal of the
Structural Division, 94, 2061-2080.
18. Garigorian, C.E. and Popov, E.P. (1994) Energy
Dissipation with Slotted Bolted Connections.
College of Engineering University of California
at Berkeley.
19. S. Inc (2012) ABAQUS Analysis User's Manual
Version 6.12-1.
20. Seismic Provisions for Structural Steel Buildings,
Illinois (2016) American Institute of Steel
Construction (AISC).
21. Wolski, M., Ricles, J.M., and Sause, A.R. (2009)
Experimental study of a self-centering beamcolumn
connection with bottom flange friction
device. Journal of Structural Engineering,
135(5), 479-488.
22. Akshay Gupta, H.K. (1999) Seismic Demands
for Performance Evaluation of Steel Moment
Resisting Frame Structures. Department of civil
and Environmental Engineering Stanford
University, Stanford.