Moment-Rotation Hysteresis Behavior of Top and Seat Angle Steel Frame Connections
Publication: Journal of Structural Engineering
Volume 125, Issue 8
Abstract
This paper presents an approach toward formulating analytical models to predict the moment-rotation hysteresis behavior of top and seat angle connections. Experimental results obtained from 12 top and seat angle connection specimens are used to obtain the prediction equations for the parameters defining the moment rotation hysteresis loops of a typical top and seat angle connection. These parameters include the initial stiffness, ultimate moment capacity, ultimate rotation, the transition moment, characteristic moment, and rigidity parameter. Regression analysis results and comparisons with test results are presented to demonstrate the acceptability of these prediction equations. The prediction equations obtained for these parameters are used to develop four different moment rotation hysteresis models for the connection: the bilinear, elastoplastic, Ramberg-Osgood, and modified bilinear models. The results of the study show that the top and seat angle connection behaves as a semirigid connection. A wide range of initial stiffnesses and ultimate moment capacities are possible to achieve by altering the connection geometry related variables within a practical range. For certain geometric configurations of the connection, significant transfer of moment from the beam to the column can occur before the connection fails. Also, it is possible to design a connection with flow stiffness and small moment transfer capability, so that it behaves in a manner such that it is close to being classified as a pin connection. The prediction equations developed for the parameters characterizing the four hysteresis models give acceptable results when compared to experimental results. The degree to which the models idealize the actual behavior varies with the elastoplastic model being the least conservative and the modified bilinear model being the best. The Ramberg-Osgood model is the most accurate in just modeling the nonpinching moment-rotation loops.
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References
1.
Astaneh-Asl, A., Nader, M. N., and Malik, L. (1989). “Cyclic behavior of double angle connections.”J. Struct. Engrg., ASCE, 115(5), 1101–1118.
2.
Barakat, M., and Chen, W. F. (1991). “Design analysis of semi-rigid frames: Evaluation and implementation.” Engrg. J., 28(2), 55–64.
3.
Biolzi, L. (1992). “Discussion of `Cyclic behavior of end-plate moment connections,' by Keh-Chyuan Tsai and Egor P. Popov.”J. Struct. Engrg., ASCE, 118(3), 874–877.
4.
Driscoll, G. C., and Lu, L. W. (1989). “Top and seat angle connections and end-plate connections: Snug versus fully pretensioned bolts.” ATLSS Rep. No. 89-06 Prepared for Nat. Sci. Found., Lehigh University, Bethlehem, Pa.
5.
Hechtman, R. A., and Johnston, B. G. (1947). “Riveted semi-rigid beam-to-column building connection.” Progress Rep. No. 1 Prepared for Am. Inst. of Steel Constr., Lehigh University, Bethlehem, Pa.
6.
Kishi, N., and Chen, W. F. (1986). “Steel construction data bank program.” Struct. Engrg. Rep. No. CE-STR-86-18, School of Civil Engineering, Purdue University, West Lafayette, Ind.
7.
Kishi, N., and Chen, W. F. (1987a). “Moment rotation of top and seat angle connections.” Struct. Engrg. Rep. No. CE-STR-87-4, School of Civil Engineering, Purdue University, West Lafayette, Ind.
8.
Kishi, N., and Chen, W. F. (1987b). “Moment rotation of top and seat angle connections.” Struct. Engrg. Rep. No. CE-STR-87-29, School of Civil Engineering, Purdue University, West Lafayette, Ind.
9.
Lee, S. J., and Lu, L. (1988). “Cyclic test of full scale composite joint assemblages.”J. Struct. Engrg., ASCE, 115(8), 1977–1998.
10.
Mander, J. B., Chen, S. S., and Pekan, G. (1994). “Low-cycle fatigue behavior of semi-rigid top-and-seat angle connections.” Engrg. J., 31(3), 111–122.
11.
Manual of steel construction: Load and resistance factor design: Volume 2, 2nd Ed. (1994). American Institute of Steel Construction, Chicago.
12.
Marley, M. J., and Gerstle, K. H. (1982). “Analysis and tests of flexibility-connected steel frames.” Rep. for Proj. No. 199 Prepared for Am. Instit. of Steel Constr., University of Colorado, Boulder.
13.
Nader, M. N., and Astaneh-Asl, A. (1996). “Shaking table tests of rigid, semirigid, and flexible steel frames.”J. Struct. Engrg., ASCE, 122(6), 589–596.
14.
Popov, E. P., Amin, N. R., Louie, J. C., and Stephen, R. M. (1985). “Cyclic behavior of large beam-column assemblages.” Earthquake Spectra, 1(2), 201–237.
15.
Popov, E. P., and Bertero, V. V. (1973). “Cyclic loading of steel beams and connections.”J. Struct. Div., ASCE, 99(6), 1189–1204.
16.
Popov, E. P., and Pinkey, R. B. ( 1968). “Cyclic loading of steel beams and connections subjected to inelastic strain reversals.” Bull. No. 3, (Nov.), American Iron and Steel Institute, Washington, D.C.
17.
Ramberg, W., and Osgood, W. R. ( 1943). “Description of stress-strain curves by three parameters.” Monograph No. 4, Publicazione Italsider, Nuova Italsider, Genova.
18.
Rathbun, J. C. ( 1936). “Elastic properties of riveted connections.” Paper No. 1933, Trans., ASCE, Reston, Va., 101, 524–563.
19.
Sarraf, M., and Bruneau, M. (1996). “Cyclic testing of existing and retrofitted riveted stiffened seat angle connections.”J. Struct. Engrg., ASCE, 122(7), 762–775.
20.
Tsai, K. C. ( 1988). “Steel beam-column joint in seismic moment-resisting frames,” MS thesis, University of California, Berkley, Calif.
21.
Tsai, K. C., and Popov, E. P. (1990). “Cyclic behavior of end-plate moment connections.”J. Struct. Engrg., ASCE, 116(11), 2917–2930.
22.
Tsai, K. C., Wu, S., and Popov, E. P. (1995). “Experimental performance of seismic steel beam-column moment joints.”J. Struct. Engrg., ASCE, 116(6), 925–931.
23.
Vayas, I., Pasternak, H., and Schween, T. (1995). “Cyclic behavior of beam-to-column steel joints with slender web panels.”J. Struct. Engrg., ASCE, 121(2), 240–248.
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Received: Apr 1, 1998
Published online: Aug 1, 1999
Published in print: Aug 1999
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