Avaliação do comportamento de vigas de bambu laminado colado submetidas à flexão

Lima, Douglas Mateus de; Amorim, Mariana Mendes; Júnior, Humberto C. Lima; Barbosa, Normando Perazzo; Wilrich, Fábio Luiz

doi:10.1590/s1678-86212014000100003

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…Wei et al [19] examined the failure of laminated bamboo beams in detail and concluded that the cross-sectional stiffness was the control condition for design load. Sinha et al [20], Lima Douglas Lima et al [21], and Sharma et al [22] examined the bending properties of LBL beams and reported considerable bending resistance that would benefit structural applications. Considering the two factors of shear-span ratio and height-to-width ratio, Li et al [23] investigated the bending performance of the LBL beam with the full consideration of the size effect.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Flexural Properties of Side-Pressure Laminated Bamboo Beams

Lei

Chen

Yuan

2020

Advances in Civil Engineering

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In this paper, two factors of width-to-height ratio and span-to-height ratio are considered and 10 side-pressure laminated bamboo beams are prepared and tested for flexural capacity to study the flexural performance when they are used as structural members. The failure mode, load-displacement curves, and the change rule of cross-section strain with height are obtained through the test. The results demonstrate that the side-pressure laminated bamboo beams have experienced elastic deformation stage, elastic-plastic deformation stage, and failure stage; the midspan deflection of beams with considerable span-to-height ratio is too large to be applied to the ultimate load, and these specimens are regarded at the ultimate limit state; stiffness or deflection should be considered as the control index in the engineering application of the side-pressure laminated bamboo beams; the bearing capacity increases proportionately with the beam width; the average strain of the section basically conforms to the plane section assumption. The experiment proposes a method for calculating the flexural capacity of the side-pressure laminated bamboo beams with nonlinear deformation, and also, the comparison between the test value and the calculated value shows that they agree well.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Flexural Properties of Side-Pressure Laminated Bamboo Beams

Lei

Chen

Yuan

2020

Advances in Civil Engineering

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“…Este fato pode ser atribuído à eficaz resistência do adesivo ao cisalhamento e pelo fato de ser à prova d'água, proporcionando juntas resistentes à imersão em água fria ou quente, sendo utilizado nas indústrias naval e de MLC [23,24].…”

Section: Cisalhamento Na Linha De Colaunclassified

Avaliação da madeira do híbrido de Eucalyptus grandis × Eucalyptus urophylla para utilização em madeira lamelada colada

et al. 2021

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RESUMO A madeira lamelada colada (MLC) possui inúmeras vantagens, podendo ser utilizada em diversos projetos com diferentes dimensões. O objetivo desta pesquisa foi avaliar as propriedades físicas e mecânicas da madeira do híbrido de E. grandis × E. urophylla visando a produção de elementos de MLC colados com os adesivos resorcinol-formaldeído (RF) e poliuretano de mamona (PUR) separadas em duas classes de densidade. A partir dos ensaios determinou-se a massa específica aparente, o teor de umidade, a retração, o inchamento, a resistência ao cisalhamento da madeira, a resistência ao cisalhamento na linha de cola, a resistência à compressão normal às fibras, o módulo de elasticidade. A partir dos resultados observou-se que a madeira do híbrido de E. grandis × E. urophylla apresentou resultados satisfatórios para ser utilizada na fabricação de elementos de MLC, sobretudo naquelas em que foram utilizadas tábuas de maior densidade aparente (≥ 0,587 g.cm-3) e colados com o adesivo resorcinol-formaldeído (RF).

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“…After testing 10 large-scale LBL beams, Wei et al [30] concluded the failure phenomena and suggested that the flexural modulus of 10 GPa could be used to verify the deformation of LBL beams. Lima et al [31] found that the failure of the LBL beams depends on the joint type, the joint position, and the adhesive used for bonding. By comparing the properties of bamboo glued beams (BGB) and LBL beams, Sinha et al [32] found that the allowable tensile, bending strength, and mean strength of the LBL beams were higher.…”

Section: Introductionmentioning

confidence: 99%

Slenderness Ratio Effect on the Eccentric Compression Performance of Chamfered Laminated Bamboo Lumber Columns

Zhou¹,

Li²,

Dauletbek³

et al. 2022

Journal of Renewable Materials

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Eccentric compression tests on 15 chamfered laminated bamboo lumber (LBL) columns with a height ranging from 600 to 3000 mm were conducted in order to study the eccentric mechanical performance. The failure of all specimens was caused by the crack of bamboo fiber in the tensile region. When the ultimate strength was reached, except specimens with a height of 600 mm, all other specimens could bear large deformation, showing good ductility. The lateral displacements of the specimens under eccentric compression were approximately parabolic in the direction of column height. The ultimate bending moment of LBL columns with different slenderness ratios under compression with the same initial eccentricity was a fixed value. The relationship between ultimate capacity, axial displacement, lateral displacement, and slenderness ratio was analyzed based on test results. It was found that the plane section assumption could be used to express the stress and strain distribution of chamfered LBL columns under eccentric compression. A method for calculating the ultimate bearing capacity was proposed using a constitutive model based on the Ramberg-Osgood relation and the empirical formula for calculating the ultimate capacity was given on the basis of the former research as well as the test results in this paper.

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Avaliação do comportamento de vigas de bambu laminado colado submetidas à flexão

Cited by 4 publications

References 3 publications

Experimental Study on Flexural Properties of Side-Pressure Laminated Bamboo Beams

Experimental Study on Flexural Properties of Side-Pressure Laminated Bamboo Beams

Avaliação da madeira do híbrido de Eucalyptus grandis × Eucalyptus urophylla para utilização em madeira lamelada colada

Slenderness Ratio Effect on the Eccentric Compression Performance of Chamfered Laminated Bamboo Lumber Columns

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