Cyclic loading tests on steel portal frame knee joints
DOI:
https://doi.org/10.5459/bnzsee.20.1.42-52Abstract
The results of cyclic loading tests on three full-size portal frame knee joints are presented. All members complied with the flange and web slenderness limits for plastic design (AS 1250-1981) but were the lightest sections for their respective depths. Large decreases in load capacity were observed when either lateral-torsional or combined local flange and web buckling occurred. Lateral restraint forces were measured and were found to exceed the minimum ultimate strength values specified by the design code rules. One fully welded connection and two bolted connections were used and suffered only minor damage during the tests.
References
Beamish, M.J. 1984. Seismic Behaviour of Steel Portal Frame Knee Joints. University of Auckland, School of Engineering, Department of Civil Engineering, Report No. 348.
Johnstone, N.D. and Walpole, W.R. 1981. Bolted End-Plate Connections Under Earthquake Type Loading. Research Report 81-7, Department of Civil Engineering, University of Canterbury.
Mann, A.P. and Morris, L.J. 1979. Limit Design of Extended End-Plate Connections. Journal of the Structural Division, ASCE 105(ST3) 511-526.
Matsui, C amd Yoshizumi, T. 1980. Influence of Local and Lateral Buckling of Inelastic Behaviour of Steel Frames. Proceedings of the 7th World Conference on Earthquake Engineering, Istanbul, V7 321-324.
Morris, L.J. 1981. A Commentary on Portal Frame Design. The Structural Engineer 59A(12) 394-404.
Morris, L.J. and Randall, A.L. 1979. Plastic Design. Constrado.
Plugge, H.B. and Walpole, W.R. 1983. The Tenacity of Bolted Beam End-Plate to Column Connections Under Simulated Seismic Loading. Research Report 83-2, Department of Civil Engineering, University of Canterbury,
Popov, E.P. 1973. Experiments with Steel Members and their Connections Under Repeated Loads. Proc. Symp. on the Resistance and Ultimate Deformability of Structures acted on by Well Defined Repeated Loads, IABSE, Lisbon, 143-149.
Standards Association of Australia, 1981. SAA Steel Structures Code. AS 1250. Sydney.
Standards Association of New Zealand. 1976. Code for Practice for General Structural Design and Design Loadings for Buildings. NZS 4203. Wellington.
Standards Association of New Zealand, 1977. Code for Design of Steel Structures. NZS 3404. Wellington.
Surtees, J.O. and Ibrahim, M.E. 1980. Bolt Tension Measurement from Head Strain Data. Journal of the Structural Division, ASCE 106(ST2) 477-490.
Surtees, J.O. and Mann, A.P. 1970. End Plate Connections in Plastically Designed Structures. Conference on Joints in Structures. University of Sheffield, paper A5.
Vann, W.P., Thompson, L.E., Whalley, L.E. and Ozier, L.D. 1973. Cyclic Behaviour of Rolled Steel Members. Proceedings of the 5th World Conference on Earthquake Engineering, Rome, 1187-1193.
Whittaker, D. and Walpole, W.R., 1982. Bolted End-Plate Connections for Seismically Designed Steel Frames. Research Report 82-11, Department of Civil Engineering, University of Canterbury.
Zoetemeijer, P. 1981. Semi-Rigid Beam-to-Beam Column Connections with Stiffened Column Flanges and Flush-End Plates. Conference on Joints in Structural Steelwork, Teeside Polytechnic, England, 2.99-2.118.
