Compression Behaviors of Parallel Bamboo Strand Lumber Under Static Loading

The out-of-plane shear properties of cross-laminated timber (CLT) substantially influence the overall mechanical properties of CLT. Various testing methods and theories related to these properties have recently been developed. The effects of the number of layers (three and five layers) and testing method (shortspan three-and four-point bending tests) on the out-of-plane shear properties of CLT were evaluated. The out-of-plane shear strength values were calculated based on different theories for comparison. The failure mode in the short-span four-point bending (FPB) method was mainly the rolling shear (RS) failure in the cross layers, indicating that the FPB method was appropriate to evaluate the RS strength of CLT. The out-of-plane shear capacity obtained using the three-point bending (TPB) method was higher than that tested by the FPB method. The testing methods significantly influenced the out-of-plane shear capacity of the three-layer specimens but not that of the five-layer specimens. With an increase in the number of layers, the out-of-plane shear strength of the specimens decreased by 24%. A linear correlation was found among the shear strength values obtained from different theories.

“…The out-of-plane shear strength decreased markedly as the number of layers increased. 4. The values calculated using the traditional theory was the highest among all four theories.…”

Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Evaluation of the Out-of-Plane Shear Properties of Cross-Laminated Timber

Yang¹,

Cao²,

Wang³

et al. 2019

“…In recent years, in order to alleviate the high demand for timber resources in China, the bamboo industry has developed rapidly. With natural bamboo as raw material, a series of new products, such as bamboo-woven plywood, bamboo mat plywood, parallel bamboo strand lumber (PBSL) [5][6][7][8][9], laminated bamboo lumber (LBL) [10][11][12][13][14] and Glubam [15] have been developed by using advanced composite and reconstituted technology and are gradually achieving a high level of industrialization.…”

Section: Introductionmentioning

confidence: 99%

Review on Connections for Original Bamboo Structures

Hong¹,

Li²,

Lorenzo³

et al. 2019

Self Cite

Bamboo is a green construction material in line with sustainable development strategies. The use of raw bamboo in architecture has existed since ancient times. In the long development years of original bamboo buildings, many areas in the world gradually formed unique bamboo buildings, which have become an important local cultural feature. For building structures, joints are the key to ensure structural load transfer. Because of hollow and thin-walled material property of bamboo, the connection in raw bamboo buildings has always been a major difficulty and problem in the application of bamboo, which seriously hinders the development of original bamboo structures. In order to promote the use of raw bamboo, two traditional connection methods in raw bamboo structures are described in this paper firstly, with the advantages and disadvantages of the two methods pointed out. Also, research progress on four categories of raw bamboo building joints is described namely, bolt joints, steel member joints, filler reinforced joints and other types of joints. This work can provide a reference for future research and engineering applications.

“…Guan et al [14] compared bending resistance of timber scrimber and bamboo scrimber through experiments, which indicated that the longitudinal flexural modulus of elasticity of bamboo scrimber is better than that of timber scrimber when their densities are larger than 0.7 g/cm 3 and the longitudinal flexural strength of bamboo scrimber is better than that of timber scrimber when their densities are larger than 0.8 g/cm 3 . Many scholars have studied different aspects of bamboo scrimber, such as mechanical properties [15][16][17], flame retardant properties [18,19] and material modification [20,21].…”

Section: Introductionmentioning

confidence: 99%

Study on Thermal Insulation Performance of Cross-Laminated Bamboo Wall

Lv¹,

Wang²,

Liu³

2019

In recent years, bamboo, as a green building material, has attracted more and more attention worldwide. Inspired by the investigation of cross-laminated timber in structural systems, a new engineered cross-laminated bamboo (CLB) consisting of the cross lamination of bamboo scrimber plates is proposed in this paper. To evaluate its potential in structural applications, the thermal insulation performances of the CLB walls and CLB walls with the EPS foam plate were studied and evaluated by the temperature-controlled box-heat flow meter method. Test results indicated that the thermal insulation performance improved with the increase of thickness, but different wall configurations had little effect on the thermal insulation performance under the same thickness of the CLB wall. The thermal insulation performance of EPS-CLB composite wall was much better than that of CLB wall. In addition, a relatively acceptable accuracy of the theoretical calculations was proved. Finally, the influence of different locations of the EPS foam plate on heat transfer coefficient can be neglected as it was studied based on the validated numerical models.