Stress–strain relationship model of glulam bamboo under axial loading

Abstract

Glulam bamboo has been preliminarily explored for use as a structural building material, and its stress–strain model under axial loading has a fundamental role in the analysis of bamboo components. To study the tension and compression behaviour of glulam bamboo, the bamboo scrimber and laminated bamboo as two kinds of typical glulam bamboo materials were tested under axial loading. Their mechanical behaviour and failure modes were investigated. The results showed that the bamboo scrimber and laminated bamboo have similar failure modes. For tensile failure, bamboo fibres were ruptured with sawtooth failure surfaces shown as brittle failure; for compression failure, the two modes of compression are buckling and compression shear failure. The stress–strain relationship curves of the bamboo scrimber and laminated bamboo are also similar. The tensile stress–strain curves showed a linear relationship, and the compressive stress–strain curves can be divided into three stages: elastic, elastoplastic and post-yield. Based on the test results, the stress–strain model was proposed for glulam bamboo, in which a linear equation was used to describe the tensile stress–strain relationship and the Richard–Abbott model was employed to model the compressive stress–strain relationship. A comparison with the experimental results shows that the predicted results are in good agreement with the experimental curves.

Quasi-Static Compression Properties of Bamboo and PVC Tube Reinforced Polymer Foam Structures

“…In Figure 12 , the deformation failure of multiple tube reinforced foam structures after testing is presented. The top section of the PVC tube shift slightly to one side when interpenetration occurred due to the transverse shear while the fracture of fibre occurred in the bamboo tube causes the tube to fractured into radial cracks and longitudinal splitting [ 7 , 17 ]. The failure of the bamboo tube can be seen clearly from the top view.…”

Cross-Laminated Timber: A Review on Its Characteristics and an Introduction to Chinese Practices

“…To make good use of bamboo, several engineered bamboo products (EBPs), such as bamboo scrimber, bamboo glulam and bamboo plywood, have been developed and utilized [41,42]. Bamboo scrimber is a new engineering material made of bamboo via defibring and compositing technology that utilizes up to 90% raw materials [43]. Many studies have been carried out on the mechanical properties, e. g. tension and bending properties, of EBPs [41][42][43][44][45], however there are few studies on the rolling shear properties of them.…”

“…Bamboo scrimber is a new engineering material made of bamboo via defibring and compositing technology that utilizes up to 90% raw materials [43]. Many studies have been carried out on the mechanical properties, e. g. tension and bending properties, of EBPs [41][42][43][44][45], however there are few studies on the rolling shear properties of them.…”

Experimental and analytical investigations on flexural behavior of bamboo beams strengthened with steel bars

“…Bamboo scrimber is a new type of bamboo engineering material. Many scholars (Chen et al, 2020b;Tian et al, 2019aTian et al, , 2019bWei et al, 2020c;Zhao et al, 2021; ) have studied the mechanical properties of bamboo. When bamboo scrimber is used as a flexural member, it has the disadvantages of insufficient bearing capacity, low bending rigidity, and weak spanning ability similar to that of wood (Kumar et al, 2016;Li et al, 2018b;Yu et al, 2017;Zhou et al, 2021).…”