Earthquakes and Structures

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A low damage and ductile rocking timber wall with passive energy dissipation devices

  • Loo, Wei Yuen (Department of Civil and Environmental Engineering, Faculty of Engineering, The University of Auckland) ;
  • Quenneville, Pierre (Department of Civil and Environmental Engineering, Faculty of Engineering, The University of Auckland) ;
  • Chouw, Nawawi (Department of Civil and Environmental Engineering, Faculty of Engineering, The University of Auckland)
  • Received : 2014.06.22
  • Accepted : 2014.12.07
  • Published : 2015.07.25
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Abstract

In conventional seismic design, structures are assumed to be fixed at the base. To reduce the impact of earthquake loading, while at the same time providing an economically feasible structure, minor damage is tolerated in the form of controlled plastic hinging at predefined locations in the structure. Uplift is traditionally not permitted because of concerns that it would lead to collapse. However, observations of damage to structures that have been through major earthquakes reveal that partial and temporary uplift of structures can be beneficial in many cases. Allowing a structure to move as a rigid body is in fact one way to limit activated seismic forces that could lead to severe inelastic deformations. To further reduce the induced seismic energy, slip-friction connectors could be installed to act both as hold-downs resisting overturning and as contributors to structural damping. This paper reviews recent research on the concept, with a focus on timber shear walls. A novel approach used to achieve the desired sliding threshold in the slip-friction connectors is described. The wall uplifts when this threshold is reached, thereby imparting ductility to the structure. To resist base shear an innovative shear key was developed. Recent research confirms that the proposed system of timber wall, shear key, and slip-friction connectors, are feasible as a ductile and low-damage structural solution. Additional numerical studies explore the interaction between vertical load and slip-friction connector strength, and how this influences both the energy dissipation and self-centring capabilities of the rocking structure.

Keywords

References

  1. Acikgoz, S. and DeJong, M.J. (2012), "The interaction of elasticity and rocking in flexible structures allowed to uplift", Earthq. Eng. Struct. Dyn., 41(15), 2177-2194. https://doi.org/10.1002/eqe.2181
  2. Buchanan, A. (2007), Timber design guide, 3rd edition, Timber Industry Federation Inc., Wellington, New Zealand.
  3. Butterworth, J.W. (2000), "Ductile concentrically braced frames using slotted bolted joints", J. Struct. Eng. Soc. NZ., 13(1), 39-48.
  4. Clifton, G.C., MacRae, H., Mackinven, S., Pampanin, S. and Butterworth, J. (2007), "Sliding hinge joints and subassemblies for steel moment frames", Proceedings of the New Zealand Society for Earthquake Engineering Conference, Palmerston North, New Zealand.
  5. Devereux, C.P., Holden, T.J., Buchanan, A.H. and Pampanin, S. (2011), "NMIT Arts & Media Building - damage mitigation using post-tensioned timber walls", Proceedings of the Ninth Pacific Conference on Earthquake Engineering, Auckland, New Zealand.
  6. ElGawady, M.A., Ma, Q., Butterworth, J.W. and Ingham, J. (2010), "Effects of interface material on the performance of free rocking blocks", Earthq. Eng. Struct. Dyn., 40(4), 375-392. https://doi.org/10.1002/eqe.1025
  7. Foliente, G.C. (1995), "Hysteresis modelling of wood joints and structural systems", J. Struct. Eng., 121(6), 1013-1021. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:6(1013)
  8. Housner, G.W. (1963), "The behaviour of inverted pendulum structures during earthquakes", Bull. Seismol. Soc. Am., 53(2), 403-417.
  9. Kelly, T. (2009), "Tentative seismic design guidelines for rocking structures", Bull. NZ. Soc. Earthq. Eng., 42(4), 239-274.
  10. Khoo, H.H., Clifton, G.C., Butterworth, J.W., MacRae, G. and Ferguson, G. (2012), "Influence of steel shim hardness on the Sliding Hinge Joint performance", J. Constr. Steel Res., 72, 119-129. https://doi.org/10.1016/j.jcsr.2011.11.009
  11. Loo, W.Y., Quenneville, P. and Chouw, N. (2012a), "A numerical approach for simulating the behaviour of timber shear walls", Struct. Eng. Mech., 42(3), 383-407. https://doi.org/10.12989/sem.2012.42.3.383
  12. Loo, W.Y., Quenneville, P. and Chouw, N. (2012b), "A numerical study of the seismic behaviour of timber shear walls with slip-friction connectors", Eng. Struct., 34(22), 233-243. https://doi.org/10.1016/j.engstruct.2011.09.016
  13. Loo, W.Y., Quenneville, P. and Chouw, N. (2014a), "A new type of symmetric slip-friction connector", J. Constr. Steel Res., 94, 11-22. https://doi.org/10.1016/j.jcsr.2013.11.005
  14. Loo, W.Y., Kun, C., Quenneville, P. and Chouw, N. (2014b), "Experimental testing of a rocking timber shear wall with slip-friction connectors", Earthq. Eng. Struct. Dyn., doi: 10.1002/eqe.2413.
  15. Makris, N. and Konstantinidis, D. (2002), "The rocking spectrum and the limitations of practical design methodologies", Earthq. Eng. Struct. Dyn., 32(2), 265-289. https://doi.org/10.1002/eqe.223
  16. Popov, E., Grigorian, C. and Yang, T. (1995), "Developments in seismic structural analysis and design", Eng. Struct., 17(3), 187-197. https://doi.org/10.1016/0141-0296(94)00006-F
  17. Popovski, M. and Karacabeyli, E. (2012), "Seismic behaviour of cross-laminated timber structures", Proceedings of the World Conference on Timber Engineering, Auckland, New Zealand.
  18. Qin, X., Chen, Y. and Chouw, N. (2013), "Effect of uplift and soil nonlinearity on plastic hinge development and induced vibrations in structures", Adv. Struct. Eng., 16(1), 135-147. https://doi.org/10.1260/1369-4332.16.1.135
  19. SAP2000 v14 (2009), Integrated solution for structural analysis and design, Computers and Structures, Inc., California, Berkeley.
  20. Shen, Y-L., Schneider, J., Tesfamariam, S., Steimer, S. and Mu, Z-G. (2012), "Hysteresis behavior of bracket connection in cross-laminated-timber shear walls", Eng. Struct., 48, 980-991.
  21. Twigden, K.M., Henry, R.S. and Ma, Q.T. (2012), "Dynamic testing of post-tensioned rocking walls", Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal.
  22. Varoglu, E., Karacabeyli, E., Stiemer, S. and Ni, C. (2006), "Midply wood shear wall system: Concept and performance in static and cyclic testing", J. Struct. Eng., 132(9), 1417-1425. https://doi.org/10.1061/(ASCE)0733-9445(2006)132:9(1417)
  23. Zarnani, P. and Quenneville, P. (2014a), "Strength of timber connections under potential failure modes - An improved design procedure", Constr. Build. Mater., 60, 81-90. https://doi.org/10.1016/j.conbuildmat.2014.02.049
  24. Zarnani, P. and Quenneville, P. (2014b), "Wood block tear-out resistance and failure modes of timber rivet connections - a stiffness-based approach", J. Struct. Eng., 140(2), 04013055. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000840

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  2. Simple cross-laminated timber shear connections with spatially arranged screws vol.173, pp.None, 2015, https://doi.org/10.1016/j.engstruct.2018.07.004