Steel and Composite Structures

  • 제23권2호
  • /
  • Pages.143-152
  • /
  • 2017
  • /
  • 1229-9367(pISSN)
  • /
  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Strength upgrading of steel storage rack frames in the down-aisle direction

  • 투고 : 2015.12.16
  • 심사 : 2016.11.18
  • 발행 : 2017.02.10
⟨ 이전 논문 다음 논문 ⟩

초록

This paper focuses on the seismic performance of pallet-type steel storage rack structures in their down aisle direction. As evidenced by experimental research, the seismic response of storage racks in the down-aisle direction is strongly affected by the nonlinear moment-rotation response of the beam-to-column connections. In their down-aisle direction, rack structures are designed to resist lateral seismic loads with typical moment frames utilizing proprietary beam-to-column moment-resisting connections. These connections are mostly boltless hooked type connections and they exhibit significantly large rotations resulting in large lateral frame displacements when subjected to strong ground motions. In this paper, typical hooked boltless beam-to-column connections are studied experimentally to obtain their non-linear reversed cyclic moment-rotation response. Additionally, a compound type connection involving the standard hooks and additional bolts were also tested under similar conditions. The simple introduction of the additional bolts within the hooked connection is considered to be a practical way of structural upgrade in the connection. The experimentally evaluated characteristics of the connections are compared in terms of some important performance indicators such as maximum moment and rotation capacity, change in stiffness and accumulated energy levels within the cyclic loading protocol. Finally, the obtained characteristics were used to carry out seismic performance assessment of rack frames incorporating the tested beam-to-column connections. The assessment involves a displacement based approach that utilizes a simple analytical model that captures the seismic behavior of racks in their down-aisle direction. The results of the study indicate that the proposed method of upgrading appears to be a very practical and effective way of increasing the seismic performance of hooked connections and hence the rack frames in their down-aisle direction.

키워드

참고문헌

  1. ANSI MH16.1 (2012), Specification for the Design, Testing and Utilization of Industrial Steel Storage Racks; Rack Manufacturers Institute (RMI).
  2. Bajoria, M.K., Sangle K.K. and Talicotti, S.R. (2010), "Modal analysis of cold-formed pallet rack structures with semi-rigid connections", J. Construct. Steel Res., 66(3), 428-441. https://doi.org/10.1016/j.jcsr.2009.10.005
  3. Bernuzzi, C. and Castiglioni, C.A. (2001), "Experimental analysis on the cyclic behaviour of beam-to-column joints in steel storage pallet racks", Thin-Wall. Struct., 39(10), 841-859.
  4. Castiglioni, C.A., Panzeri, N., Brescianini, J.C. and Carydis, P. (2003), "Shaking table tests on steel pallet racks", Proceedings of the Conference on Behaviour of Steel Structures in Seismic Areas-Stessa, Naples, Italy, June, pp. 775-781.
  5. Chen, C.K., Scholl, R.E. and Blume, J.A. (1980), "Seismic study of industrial storage racks", Report prepared for the National Science Foundation and for the Rack Manufacturers Institute and Automated Storage and Retrieval Systems (sections of the Material Handling Institute); John A. Blume & Associates, San Francisco, CA, USA.
  6. Chen, C.K., Scholl, R.E. and Blume, J.A. (1981), "Seismicresistant design of industrial storage racks", Proceedings of the Second Specialty Conference on Dynamic Response of Structures: Experimentation, Observation and Control, Atlanta, GA, USA, pp. 745-759.
  7. Clifton, C., Bruneau, M., MacRae, G., Leon, R. and Fussell, A. (2011), "Steel structures damage from the Christchurch earthquake series of 2010 and 2011", Bull. New Zealand Soc. Earthq. Eng., 44(4), 297-318.
  8. FEMA 460 (2005), Seismic Considerations for Steel Storage Racks Located in Areas Accessible to the Public, Building Seismic Safety Council for the Federal Emergency Management Agency, National Institute of Building Sciences Washington, DC, USA.
  9. Filiatrault, A. and Wanitkorkul, A. (2004), "Shake-table testing of frazier industrial storage racks", Report No. CSEE-SEESL- 2005-02; Structural Engineering and Earthquake Simulation Laboratory, Departmental of Civil Structural and Environmental Engineering, State University of New York System, Buffalo, NY, USA.
  10. Filiatrault, A., Bachman, R.E. and Mahoney, M.G. (2006a), "Performance-based seismic design of pallet-type steel storage racks", Earthq. Spectra, 22(1), 47-64. https://doi.org/10.1193/1.2150233
  11. Filiatrault, A., Wanitkorkul, A. and Higgins, P. (2006b), "Experimental stiffness and seismic response of pallet-type steel storage rack connectors", ASCE Practice Periodical on Structural Design and Construction, 11(3), 161-170. https://doi.org/10.1061/(ASCE)1084-0680(2006)11:3(161)
  12. Kalavagunta, S., Naganathan, S. and Mustapha, K.N. (2012), "Pushover analysis for cold formed storage rack structures", Jordan J. Civil Eng., 6(4), 489-500.
  13. Petrovic, S. and Kilar, V. (2012), "Effects of horizontal and vertical mass-asymmetric distributions on the seismic response of a high-rack steel structure", Adv. Struct. Eng., 15(11), 1977- 1988. https://doi.org/10.1260/1369-4332.15.11.1977
  14. Prabha, P., Marimuthu, V., Saravanan, M. and Jayachandran, S.A. (2010), "Evaluation of connection flexibility in cold formed steel racks", J. Construct. Steel Res., 66(7), 863-872. https://doi.org/10.1016/j.jcsr.2010.01.019
  15. Saravanan, M., Marimuthu, V., Prabha, P., Surendran, M. and Palani, G.S. (2014), "Seismic characterization of cold formed steel pallet racks", Earthq. Struct., Int. J.., 7(6), 955-967. https://doi.org/10.12989/eas.2014.7.6.955
  16. Sideris, P., Filiatrault, A., Leclerc, M. and Tremblay, R. (2010), "Experimental investigation on the seismic behavior of palletized merchandise in steel storage racks", Earthq. Spectra, 26(1), 209-233. https://doi.org/10.1193/1.3283389

피인용 문헌

  1. Behavior of steel storage pallet racking connection - A review vol.30, pp.5, 2019, https://doi.org/10.12989/scs.2019.30.5.457
  2. Perforated TWCF steel beam-columns: European design alternatives vol.35, pp.5, 2017, https://doi.org/10.12989/scs.2020.35.5.701