Influence of Shape and Dimensions of Lamina on Shear and Bending Strength of Vertically Glue Laminated Bamboo Beam

Mujiman,; Priyosulistyo, Henricus; Sulistyo, Djoko; Prayitno, Tibertius Agus

doi:10.1016/j.proeng.2014.12.161

Cited by 11 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Curved slats will increase the yield of laminated bamboo, usually 7-13% higher than those with square cross-sections (Budiana, Kusmawan, & Rusli, 2014). Besides, the curved cross-section has a better mechanical advantage than the square one due to the cross-section's larger modulus, more resistant to loading and more rigid as reported by Mujiman et al (2014).…”

Section: Introductionmentioning

confidence: 92%

Fixation Process of Laminated Bamboo Compression From Curved Cross-Section Slats

Darmawan¹,

Bahanawan

Adi

et al. 2021

Ina.J.For.Res

View full text Add to dashboard Cite

Removing the outer part of bamboo for manufacturing flat bamboo lamination has disadvantage on the density of the product. The purpose of this experiment was to investigate the fixation of compressed bamboo from curved cross-section slats. The compression of bamboo slats using densification technique was aimed for uniform density. Furthermore, steam treatments were conducted to fix the deformation. The compressed bamboo slats revealed that the density of the samples at the bottom parts increased from 0.40–0.56 g/cm3 to 0.89–1.05 g/cm3 after pressing with a compression level between 46.98–63.97%, while the samples in the middle parts increased from 0.70–0.83 g/cm3 to 1.02–1.18 g/cm3 with the compression level of 32.92–41.50%. These results were slightly higher than that of the upper parts, which was between 0.91–0.98 g/cm3. The recovery of set decreased and the weight loss increased with increasing temperature and steam treatment time. Fixation of compressive deformation could be achieved at 160°C within 60 minutes. The bottom parts of samples experienced a slightly greater weight loss compared to the middle parts, i.e. 8.38% and 7.49%, respectively. The anatomical structure of bamboo tended to deform during densification process. Furthermore, the steam treatments affected the colour of densified bamboo which became darker. From this experiment, it can be concluded that the manufacture of laminated bamboo from bamboo slats can be uniformed in strength by equalizing the density at the bottom and middle with the upper parts through the densification technique. However, further research should be conducted to know the delamination and shear strength of the bamboo lamination.

show abstract

Section: Introductionmentioning

confidence: 92%

Fixation Process of Laminated Bamboo Compression From Curved Cross-Section Slats

Darmawan¹,

Bahanawan

Adi

et al. 2021

Ina.J.For.Res

View full text Add to dashboard Cite

show abstract

“…Mujiman, et al [44] improved the shear and flexural strength of the LBL beams by modifying the shape of the cross-section of the lamina (curved) rather than the ordinary rectangular shape of the lamina (Fig. 8).…”

Section: Beamsmentioning

confidence: 99%

“…The research results showed that in general, the LBL beams with curved lamina were more durable, rigid, and ductile compared to the beams with rectangular lamina. The average shear and bending strength of the LBL beams with the curved lamina of 7 mm thick were much better than that of 9 mm thick of curved lamina, constituting 2.72 and 68.80 MPa, respectively [44]. The researchers proposed several factors as critical design criteria for calculating bamboo beams in design such as the cross-sectional stiffness [22] or deflection [39,40].…”

Section: Beamsmentioning

confidence: 99%

A review of mechanical behavior of structural laminated bamboo lumber

Dauletbek¹,

Li²,

Xiong³

et al. 2021

Sustain. Struct.

View full text Add to dashboard Cite

The transition of the construction sector to sustainable development mostly depends on the environmental friendliness of building materials. This, in turn, calls for the development of new, strong, and sustainable materials that would be a worthy alternative for traditional materials, including wood. Over the past decade, laminated bamboo lumber (LBL) has received much attention from engineers, practitioners, and scientists for its attractive mechanical properties, comparable to and in some cases superior to hard and softwood. Moreover, the sustainability of LBL is characterized by its high carbon sequestration, fast time to harvest, high yield, and low energy consumption for processing. However, the behavior of LBL is not yet fully understood, which in turn affects the low awareness and application of the material by practitioners and engineers around the world. Since LBL has a promising future, this article will contribute to a better understanding of its mechanical properties and a more accurate design, taking into account the influencing factors. This article discusses the mechanical properties of three types of structural LBL, namely beams, columns, and sheathing panels. The previous works of researchers on the mechanical properties of structural LBL were reviewed, and thus the most common failure modes, the causes of the destruction of structural elements, and the factors that affect their behavior were discussed and described. This work will serve as a reference for current practitioners and future research.

show abstract

“…Based on the direction of the laminate arrangement to the loading, laminated beams are divided into horizontal and vertical laminated beams. This concept adopts the principle of the strength of bamboo from within to most of the layers [2]. Composite materials utilize the physical and mechanical properties of each material to form a new and better material.…”

Section: Introductionmentioning

confidence: 99%

The Reinforcement of Flexible Composite Beams Laminated Camphor – Reinforced Concrete

Rezeki¹,

Astor²,

Mujiman³

et al. 2021

Proceedings of the 2nd International Seminar of Science and Applied Technology (ISSAT 2021)

View full text Add to dashboard Cite

Indonesia has a lot of abundant material resources. One of them is the availability of solid wood that can be used for bridge construction. The wood used as a bridge structural element has a 15-20 meters span with class III road loading capacity. However, wood has limited dimensions. Therefore, it is needed for wood to be composited into reinforced concrete laminated beams as planned. The planning of reinforced concrete laminated wood beams refers to the materials' characteristics, including the mechanical properties of Camphor wood. These characteristics are used as the basis for analyzing the performance of Laminated-concrete-reinforced Camphor composite beams. The dimensions of the composite beam specimen are 250 x 30 x 25.5 cm in the scale of a 1:3 model with actual measurements. The analysis was carried out manually to determine the strength of the Laminated-concrete-reinforced Camphor composite beams. The variables used in this analysis include the number of layers of CFRP as flexural reinforcement compared to beams without CFRP reinforcement. The number of layers of CFRP consists of 1 layer, 2 layers, 3 layers. Composite beams were analyzed with two concentrated loads in the area 1/3 of the span length from the supports. The results of the analysis show that the composite beam using CFRP can carry an additional load of 86.86 kN (101.68%) for 1 layer of CFRP; 87.99 kN (103.07%) for 2 layers of CFRP; and 93.81 kN (109.83%) for 3 layers of CFRP compared to the experimental load that can be received by standard composite beams of 85.42 kN (100%).

show abstract

Influence of Shape and Dimensions of Lamina on Shear and Bending Strength of Vertically Glue Laminated Bamboo Beam

Cited by 11 publications

References 6 publications

Fixation Process of Laminated Bamboo Compression From Curved Cross-Section Slats

Fixation Process of Laminated Bamboo Compression From Curved Cross-Section Slats

A review of mechanical behavior of structural laminated bamboo lumber

The Reinforcement of Flexible Composite Beams Laminated Camphor – Reinforced Concrete

Contact Info

Product

Resources

About