CLC number: TU366.2
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2015-11-10
Cited: 2
Clicked: 4343
Xiao-bin Song, Ya-jie Wu, Rui Jiang. Compressive capacity of longitudinally cracked wood columns retrofitted by self-tapping screws[J]. Journal of Zhejiang University Science A, 2015, 16(12): 964-975.
@article{title="Compressive capacity of longitudinally cracked wood columns retrofitted by self-tapping screws",
author="Xiao-bin Song, Ya-jie Wu, Rui Jiang",
journal="Journal of Zhejiang University Science A",
volume="16",
number="12",
pages="964-975",
year="2015",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1500069"
}
%0 Journal Article
%T Compressive capacity of longitudinally cracked wood columns retrofitted by self-tapping screws
%A Xiao-bin Song
%A Ya-jie Wu
%A Rui Jiang
%J Journal of Zhejiang University SCIENCE A
%V 16
%N 12
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%@ 1673-565X
%D 2015
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1500069
TY - JOUR
T1 - Compressive capacity of longitudinally cracked wood columns retrofitted by self-tapping screws
A1 - Xiao-bin Song
A1 - Ya-jie Wu
A1 - Rui Jiang
J0 - Journal of Zhejiang University Science A
VL - 16
IS - 12
SP - 964
EP - 975
%@ 1673-565X
Y1 - 2015
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1500069
Abstract: This paper presents the results of an experimental and numerical study of the compressive capacity of longitudinally cracked wooden columns retrofitted using self-tapping screws. The screws were driven into the wood perpendicular to the wood grain to alleviate the propagation of existing cracks and to improve the structural integrity of the cracked columns. Full-scale concentric and eccentric compression tests were conducted to investigate the failure modes and maximum load carrying capacity of such columns. A 3D finite element model was developed, verified, and then used for a parametric study. The test results indicated that the cracks (of 6 mm wide) caused a resistance loss of up to 19% compared with an intact column, but most of this resistance loss can be remedied by using self-tapping screws. It was also found that such resistance loss and recovery are dependent on the seriousness of the cracking, and generally increase with the increased initial mid-height deflection and decreased screw spacing, whereas a screw spacing of 100 mm would be sufficient for most cases considered in this study.
Given increasing interest of retrofitting of timber structures in modern-day rehabilitation and restoration, as well as the realistic environment at which the experiments were conducted, the manuscript addresses an issue that is very important from the practical point of view; as such, it is important in field and useful to the profession. It is also an issue that poses theoretical, as well as experimental challenges, and, as such, it is also useful to research in academia and deserves a broader dissemination.
[1]ASTM (American Society for Testing and Materials), 2014. Standard Test Methods for Small Clear Specimens of Timber, ASTM D143-14. American Society for Testing and Materials, West Conshohocken, USA.
[2]Blass, H.J., Schmid, M., 2001. Self-tapping screws as reinforcement perpendicular to the grain in timber connections. International RILEM Symposium, RILEM Publications S.A.R.L., Stuttgart, Germany.
[3]Blass, H.J., Bejtka, I., 2004. Reinforcement perpendicular to the grain using self-tapping screws. The 8th World Conference on Timber Engineering, Lahti, Finland, Vol. 1.
[4]Chidiaq, R., 2003. Axial compression of rounded wood poles reinforced with carbon fibers. MSc Special Project, Department of Civil Engineering, Rutgers, State University of New Jersey, Piscataway, USA.
[5]Davalos, J.F., Zipfel, M.G., Qiao, P., 1999. Feasibility study of prototype GFRP-reinforced wood railroad crosstie. Journal of Composites for Construction, 3(2):92-99.
[6]Echavarría, C., 2007. Bolted timber joints with self-tapping screws. Revista EIA, (8):37-47.
[7]Ehsani, M., Larsen, M., Palmer, N., 2004. Strengthening of old wood with new technology. Structure, p.19-21.
[8]Emerson, R.N., 2004. In situ repair technique for decayed timber piles. Proceedings of Building on the Future, Securing the Past Conference, Nashville, USA, p.1-9.
[9]Foraboschi, P., 2013. Church of San Giuliano di Puglia: seismic repair and upgrading. Engineering Failure Analysis, 33:281-314.
[10]Foraboschi, P., Vanin, A., 2014. Experimental investigation on bricks from historical Venetian buildings subjected to moisture and salt crystallization. Engineering Failure Analysis, 45:185-203.
[11]Foraboschi, P., Vanin, A., 2015. Mechanical behavior of the timber-terrazzo composite floor. Construction and Building Materials, 80:295-314.
[12]Gehloff, M., Closen, M., Lam, F., 2010. Reduced edge distances in bolted timber moment connections with perpendicular to grain reinforcements. Proceeding of the World Conference on Timber Engineering, Vol. 230.
[13]Hong, J.P., 2007. Three-dimensional Nonlinear Finite Element Model for Single and Multiple Dowel-type Wood Connections. PhD Thesis, University of British Columbia, Vancouver, Canada.
[14]Jönsson, J., 2005. Load carrying capacity of curved glulam beams reinforced with self-tapping screws. Holz als Roh-und Werkstoff, 63(5):342-346.
[15]MOHURD (Ministry of Housing and Urban-Rural Development of the People’s Republic of China), 1992. Technical code for maintenance and strengthening of ancient timber buildings, GB50165-92. Chinese National Standard, China Architecture and Building Press, Beijing, China (in Chinese).
[16]Najm, H., Secaras, J., Balaguru, P., 2007. Compression tests of circular timber column confined with carbon fibers using inorganic matrix. Journal of Materials in Civil Engineering, 19(2):198-204.
[17]Oprisan, G., Taranu, N., Entuc, I.S., 2004. Strengthening of the timber members using fiber reinforced polymer composites. The Bulletin of the Polytechnic Institute of Jassy, Construction. Architecture Section, p.67-76.
[18]Plevris, N., Triantafillou, T.C., 1992. FRP-reinforced wood as structural material. Journal of Materials in Civil Engineering, 4(3):300-317.
[19]Simpson, W., TenWolde, A., 1999. Wood Handbook: Wood as an Engineering Material. General Technical Report FPL-GTR-113, Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, USA.
[20]Song, X.B., Jiang, R., Zhang, W.P., et al., 2012. Compressive behavior of longitudinally cracked wood columns retrofitted by self-tapping screws. Proceeding of the World Conference on Timber Engineering, Auckland, New Zealand.
[21]Tannert, T., Lam, F., 2009. Self-tapping screws as reinforcement for rounded dovetail connections. Structural Control and Health Monitoring, 16(3):374-384.
[22]Trautz, M., 2009. Self-tapping screws as reinforcement for timber structures. Proceedings of the International Association for Shell and Spatial Structures Symposium, Valencia, Spain.
[23]Weibull, W., 1939. A Statistical Theory of the Strength of Materials. Generalstabens litografiska anstalts förlag, Stockholm.
[24]Zhang, W.P., Song, X.B., Gu, X.L., et al., 2012. Compressive behavior of longitudinally cracked timber columns retrofitted using FRP sheets. Journal of Structural Engineering, 138(1):90-98.
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