Abstract
Due to the high sensitivity of fire affected steel behavior, fire resistance of steel structures is of great importance. Moreover, since the connections act as the main means of integration of frame members, the behavior of steel connections in fire is significantly important. Considering the importance of this matter, this paper describes a spring-stiffness model developed to predict the behavior of welded angle connections made of bare-steel at elevated temperature. The joint components are considered as springs with predefined mechanical properties i.e. stiffness and strength. The elevated temperature joint’s response can be predicted by assembling the stiffness of the components which are assumed to degrade with increasing temperature based on the recommendations presented in the design code. Comparison of the results from the model with existing experimental data shows good agreement. The proposed model can be easily modified to describe the elevated temperature behavior of other types of joints as well as joints experiencing large rotations.
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References
Al-Jabri, K. S., Lennon, T., Burgess, I. W., and Plank, R. J. (1998). Behavior of steel and composite beam-column joints in fire. Journal of Constructional Steel Research, 46 (1-3), pp. 308–309.
Al-Jabri, K. S., Lennon, T., Burgess, I. W., and Plank, R. J. (1999). The performance of frame joints in fire. ACTA Polytech, 39 (5), pp. 65–75.
Aseeva, R., Serkov, B., and Sivenkov, A. (2014). Fire Safety and Fire Resistance of Building Structures and Timber Constructions. In Fire Behavior and Fire Protection in Timber Buildings, pp. 177–198, Springer Netherlands.
Azizinamini, A., Bradburn, J. H., and Radziminski, J. B. (1987). Initial stiffness of semi-rigid steel beam-tocolumn connections. Journal of Constructional Steel Research, 8, pp. 71–90.
Azizinamini, A. and Radziminski, J. B. (1989). Static and cyclic performance of semirigid steel beam-to-column connections. Journal of Structural Engineering, 115 (12), pp. 2979–2999.
Blodget, O. W. (1966). Design of welded structures, The James F. Lincoln Arc Welding Foundation.
Euro code 3. (2003). Design of steel structures, Part 1-8: general rules design of joints, prEN-1993-1-8. European Committee for Standardization (CEN).
Johnston, B. G. and Kubo, G. G. (1941). Web Crippling at Seat Angle Supports.
Kishi, N. and Chen, W. F. (1990). Moment-rotation relations of semirigid connections with angles. Journal of Structural Engineering, 116 (7), pp. 1813–1834.
Kishi, N., Chen, W. F., Matsuoka, K. G., and Nomachi, S. G. (1987a). Moment-rotation relation of top-and seat-angle with double web-angle connections. School of Civil Engineering, Purdue University.
Kishi, N. and Chen, W. F. (1987b). Moment Rotation of Top and Seat Angle Connections. Structural Engineering Report No. CE-STR-87-29, School of Civil Engineering, Purdue University, West Lafayette, Indiana.
Hantouche, E. G. and Sleiman, S. A. (2016). Response of double angle and shear endplate connections at elevated temperatures. International Journal of Steel Structures, 16 (2), pp. 489–504.
Hean, L. S., Sulong, N. R., and Jameel, M. (2016). Effect of axial restraints on top-seat angle connections at elevated temperatures. KSCE Journal of Civil Engineering, 20 (6), pp. 2375–2383.
Hu, G. and Engelhardt, M. D. (2010). Behavior of Steel Single-Plate Beam End Framing Connections in Fire. In Structures Congress 2010, pp. 1554–1565.
Liew, J. Y. R., White, D. W., and Chen, W. F. (1993). Limit state design of semi-rigid frames using advanced analysis: Part1: Connection modeling and classification, Journal of Constructional Steel Research, 26.
Meacham, B. J., Charters, D., Johnson, P., and Salisbury, M. (2016). Building fire risk analysis. In SFPE Handbook of Fire Protection Engineering, pp. 2941–2991, Springer New York.
Qiang, X., Bijlaard, F., Kolstein, H., and Twilt, L. (2013). Numerical Analysis of High Strength Steel Endplate Connections at Ambient and Elevated Temperatures. Journal of Structural Fire Engineering, 4 (3), pp. 143–152.
Saedi Daryan, A. and Yahyai, M. (2009a). Behavior of bolted top-seat angle connections in fire. Journal of Constructional Steel Research, 65 (3), pp. 531–541.
Saedi Daryan, A. and Yahyai, M. (2009b). Modeling of bolted angle connections in fire. Fire Safety Journal, 44 (7), pp. 976–988.
Saedi Daryan, A. and Yahyai, M. (2009c). Behaviour of welded top-seat angle connections exposed to fire. Fire Safety Journal, 44 (4), pp. 603–611.
Tamboli, A. R. (1999). Handbook of structural steel connection design and details. New York: McGraw-Hill.
Yahyai, M. and Saedi Daryan, A. (2013). The study of welded semi-rigid connections in fire. The Structural Design of Tall and Special Buildings, 22 (10), pp. 783–801.
Yee, Y. L. and Melchers, R. E. (1986). Moment-rotation curves for bolted connections. Journal of Structural Engineering, 112 (3), pp. 615–635.
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Saedi Daryan, A. The simple model for welded angle connections in fire. Int J Steel Struct 17, 1009–1020 (2017). https://doi.org/10.1007/s13296-017-9012-y
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DOI: https://doi.org/10.1007/s13296-017-9012-y