DOI QR코드

DOI QR Code

Effect of connection modeling on the seismic response of steel braced non-moment resisting frames

  • 투고 : 2018.06.27
  • 심사 : 2018.10.23
  • 발행 : 2018.12.10

초록

Non-moment beam-to-column connections, which are usually referred to as simple or shear connections, are typically designed to carry only gravity loads in the form of vertical shears. Although in the analysis of structures these connections are usually assumed to be pinned, they may provide a small amount of rotational stiffness due to the typical connection details. This paper investigates the effects of this small rotational restraint of simple beam-to-column connections on the behavior and seismic response of steel braced non-moment resisting frames. Two types of commonly used simple connections with bolted angles, i.e., the Double Web angle Connection (DWC) and Unstiffened Seat angle Connection (USC) are considered for this purpose. In addition to the pinned condition - as a simplified representation of these connections - more accurate semi-rigid models are established and then applied to some frame models subjected to nonlinear pushover and nonlinear time history analyses. Although the use of bracing elements generally reduces the sensitivity of the global structural response to the behavior of connections, the obtained results indicate considerable effects on the local responses. Namely, our results show that consideration of the real behavior of connections is essential in designing the column elements where the pin-connection assumption significantly underestimates design of outer columns of upper stories.

키워드

참고문헌

  1. AISC (2011), Steel Construction Manual, 14th Edition, American Institute of Steel Construction, Chicago, U.S.A.
  2. AISC 360-10 (2010), Specification for Structural Steel Buildings, American Institute of Steel Construction, Chicago, U.S.A.
  3. Astaneh-Asl, A., Liu, J. and McMullin, K.M. (2002), "Behavior and design of single plate shear connections", J. Constr. Steel Res., 58, 1121-1141. https://doi.org/10.1016/S0143-974X(01)00101-8
  4. Awkar, J.C. and Lui, E.M. (1999), "Seismic analysis and response of multistory semirigid frames", Eng. Struct., 21(5), 425-441. https://doi.org/10.1016/S0141-0296(97)00210-1
  5. Bjorhovde, R., Colson, A. and Brozzetti, J. (1990), "Classification system for beam-to-column connections", J. Struct. Eng., 116(11), 3059-3076. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:11(3059)
  6. Braham, M. and Jaspart, J.P. (2004), "Is it safe to design a building structure with simple joints, when they are known to exhibit a semi-rigid behaviour?", J. Constr. Steel Res., 60, 713-723. https://doi.org/10.1016/S0143-974X(03)00138-X
  7. Chen, S., Pan, J., Yuan, H., Xie, Z., Wang, Z. and Dong, X. (2017), "Mechanical behavior investigation of steel connections using a modified component method", Steel Compos. Struct., 25(1), 117-126. https://doi.org/10.12989/SCS.2017.25.1.117
  8. Chen, W.F. and Kishi, N. (1989), "Semi-rigid steel beam-to-column connections: Data base and modeling", J. Struct. Eng., 115(1), 105-119. https://doi.org/10.1061/(ASCE)0733-9445(1989)115:1(105)
  9. Chen, W.F. and Lui, E.M. (1987), "Effects of joint flexibility on the behavior of steel frames", Comput. Struct., 26(5), 719-732. https://doi.org/10.1016/0045-7949(87)90021-6
  10. Diaz, C., Marti, P., Victoria, M. and Querin, O.M. (2011), "Review on the modelling of joint behaviour in steel frames", J. Constr. Steel Res., 67, 741-758. https://doi.org/10.1016/j.jcsr.2010.12.014
  11. Elnashai, A.S., Elghazouli, A.Y. and Denesh-Ashtiani, F.A. (1998), "Response of semirigid steel frames to cyclic and earthquake loads", J. Struct. Eng., 124(8), 557-5676.
  12. FEMA-356 (2000), Prestandard and Commentary for Seismic Rehabilitation of Buildings, Federal Emergency Management Agency, Washington, U.S.A.
  13. Gong, Y. (2009), "Design moment of shear connections at the ultimate limit state", J. Constr. Steel Res., 65, 1921-1930. https://doi.org/10.1016/j.jcsr.2009.06.004
  14. Hadianfard, M.A. (2012), "Using integrated displacement method to time-history analysis of steel frames with nonlinear flexible connections", Struct. Eng. Mech., 41(5), 675-689. https://doi.org/10.12989/sem.2012.41.5.675
  15. Kim, S.E. and Choi, S.H. (2001), "Practical advanced analysis for semi-rigid space frames", Int. J. Sol. Struct., 38(50-51), 9111-9131. https://doi.org/10.1016/S0020-7683(01)00141-X
  16. Kishi, N. and Chen, W.F. (1990), "Moment-rotation relations of semi-rigid connections with angles", J. Struct. Eng., 116(7), 1813-1834. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:7(1813)
  17. Kishi, N., Chen, W.F., Goto, Y. and Matsuoka, K.G. (1991a), "Applicability of three-parameter power model to structural analysis of flexibly jointed frames", Proc. Mechanics Computing in 1990's and Beyond, Columbus OH.
  18. Kishi, N., Goto, Y., Chen, W.F. and Matsuoka, K.G. (1991b), "Sensitivity analysis of connection stiffness in orthogonal frames with end-plate connections", Proc. Mechanics Computing in 1990's and Beyond, Columbus OH.
  19. Kong, Z. and Kim, S.E. (2017), "Moment-rotation behavior of top-and seat-angle connections with double web angles", J. Constr. Steel Res., 128, 428-439. https://doi.org/10.1016/j.jcsr.2016.09.010
  20. Liew, J.Y.R., White, D.W. and Chen, W.F. (1993), "Limit states design of semi-rigid frames using advanced analysis: Part 1: connection modeling and classification", J. Constr. Steel Res., 26(1), 1-27. https://doi.org/10.1016/0143-974X(93)90065-Z
  21. Lui, E.M. and Chen, W.F. (1987), "Steel frame analysis with flexible joints", J. Constr. Steel Res., 8, 161-202. https://doi.org/10.1016/0143-974X(87)90058-7
  22. Lui, E.M. and Chen, W.F. (1988), "Behavior of braced and unbraced semi-rigid frames", Int. J. Sol. Struct., 24(9), 893-913. https://doi.org/10.1016/0020-7683(88)90040-6
  23. Nader, M.N. and Astaneh-Asl, A. (1996), "Shaking table tests of rigid, semirigid, and flexible steel frames", J. Struct. Eng., 122(6), 589-596. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:6(589)
  24. Pirmoz, A., Seyed Khoei, A., Mohammadrezapour, E. and Saedi Daryan, A. (2009), "Moment-rotation behavior of bolted top-seat angle connections", J. Constr. Steel Res., 65, 973-984. https://doi.org/10.1016/j.jcsr.2008.08.011
  25. SAP2000 (2009), Linear and Nonlinear Static and Dynamic Analysis and Design of Three-Dimensional Structures, Computers and Structures, Inc., Berkeley, California, U.S.A.
  26. Sekulovic, M., Salatic, R. and Nefovska, M. (2002), "Dynamic analysis of steel frames with flexible connections", Comput. Struct., 80(11), 935-955. https://doi.org/10.1016/S0045-7949(02)00058-5
  27. Shen, J. and Astaneh-Asl, A. (1999), "Hysteretic behavior of bolted-angle connections", J. Constr. Steel Res., 51, 201-218. https://doi.org/10.1016/S0143-974X(99)00030-9
  28. Shen, J. and Astaneh-Asl, A. (2000), "Hysteretic model of bolted-angle connections", J. Constr. Steel Res., 54, 317-343. https://doi.org/10.1016/S0143-974X(99)00070-X
  29. Shi, G., Shi, Y., Wang, Y., Li, S. and Chen, H. (2004), "Finite element analysis and tests on bolted end-plate connections in steel portal frames", Adv. Struct. Eng., 7(3), 245-256. https://doi.org/10.1260/136943304323213193
  30. Zohra, D.F. and Abd Nacer, I.T. (2018), "Dynamic analysis of steel frames with semi-rigid connections", Struct. Eng. Mech., 65(3), 327-334. https://doi.org/10.12989/SEM.2018.65.3.327