doi:10.1016/j.engstruct.2006.09.003
Copyright © 2006 Elsevier Ltd All rights reserved.
Lightweight bamboo double layer grid system
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F. Albermania, 
, 
, G.Y. Goha and S.L. Chanb
aDepartment of Civil Engineering, University of Queensland, St Lucia, 4072 Brisbane, QLD, Australia
bDepartment of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Kong
Received 9 May 2006;
revised 6 September 2006;
accepted 7 September 2006.
Available online 19 October 2006.
Abstract
The paper presents the structural and environmentally sustainable aspects of bamboo as a valid construction material. A special PVC joint designed for bamboo double layer grids (DLG) is presented and implemented in a 2.3×2.3×0.9 m DLG module. Experimental results obtained from evaluating two bamboo species, proof loading of the proposed PVC joint and loading of the DLG module are presented and compared to numerical predictions. The results indicate that the proposed DLG system can be used in practice for constructing lightweight medium-span bamboo structures with excellent structural, aesthetic and environmental attributes.
Keywords: Bamboo; PVC joint system; Double-layer grid; Lightweight structures
Fig. 1. (a) Bending, (b) buckling, (c) compression tests of bamboo.
Fig. 3. Compression and buckling tests.
Fig. 4. Proposed new PVC joint system for bamboo.
Fig. 5. Von Mises stress contour (MPa) of one part of the hub under 12 kN compression force.
Fig. 6. Prototype PVC joint, (a) basic components, (b) assembled joint.
Fig. 7. Proof loading of the joint hub, (a) compression, (b) tension, (c) bending.
Fig. 8. Compression test of the hub joint.
Fig. 10. Plan and side view of the double layer grid.
Fig. 11. Experimental setup of the double layer grid.
Fig. 12. The loading of the double layer grid.
Fig. 13. Comparison of the experimental and predicted results for deflection at node N5.
Fig. 14. Von Mises stress contour (MPa) at node D under 10 kN load on the grid.
Table 1.
Structural attributes of bamboo against conventional materials
Table 2.
Compression, buckling and bending test results
Table 3.
Test results from Chung et al. [6]
S = slenderness ratio.
Table 4.
Comparison of member axial forces obtained from experiment and nonlinear analysis (negative is compression)
Table 5.
Average properties of the bamboo members used in the double layer grid
Corresponding author.
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