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A Review of Basic Mechanical Behavior of laminated bamboo lumber

Journal of Renewable Materials 2022年第2期10卷 273-300页

作者： Assima Dauletbek Haitao Li Rodolfo Lorenzo Ileana Corbi Ottavia Corbi Mahmud Ashraf College of Civil Engineering Nanjing Forestry UniversityNanjing210037China Joint International Research Laboratory for Bio-Composite Building Materials and Structures Nanjing Forestry UniversityNanjing210037China University College London LondonWC1E 6BTUK University of Naples Federico II Naples80133Italy Deakin University GeelongVIC 3216Australia

Over the past decade,the physical and mechanical performances of laminated bamboo lumber(LBL)–a bamboo-based structural material,have been extensively studied using experimental,analytical,and numerical *** paper presents a review of existing knowledge in the literature about the mechanical properties of *** paper involved the review of the response of LBL to different types of loading such as tension,bending,compres-sion,and *** on results of the literature reviewed,the strength of LBL parallel to grain was 90–124 MPa with MOE of 10700 MPa in tension,29.55–72.60 MPa,and MOE of 8396–11022 MPa in compression,63.87–128.4 MPa,and MOE of 8320–10912 MPa in bending,and 7.15–17.5 MPa in *** average strength of LBL was similar and in some cases exceeded the average values of bamboo-or wood-based materials,while the variability of its mechanical parameters was *** variability in strength values of LBL was affected by bamboo species,density and thickness of bamboo strips,growth portion,type of treatment,strips arrange-ments,and type of adhesive which in turn calls for classification of LBL by strength grades,degree of hardness,the capability of impregnation and penetration,as well as by areas of application in *** study pro-vided and discussed concluding observations,the current research gap,and future research directions on the mechanical properties of LBL.

关键词： laminated bamboo lumber mechanical properties composites

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Slenderness Ratio Effect on the Eccentric Compression Performance of Chamfered laminated bamboo lumber Columns

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Journal of Renewable Materials 2022年第1期10卷 165-182页

作者： Ke Zhou Haitao Li Assima Dauletbek Dong Yang Zhenhua Xiong Rodolfo Lorenzo Kun Zhou Ileana Corbi Ottavia Corbi College of Civil Engineering Nanjing Forestry UniversityNanjing210037China Joint International Research Laboratory of Bio-Composite Building Materials and Structures Nanjing Forestry UniversityNanjing210037China Ganzhou Sentai bamboo Company Ltd.Ganzhou341001China University College London LondonWC1E 6BTUK Guangxi Lvjing bamboo Company Ltd. Guilin541402China University of Naples Federico II Naples80133Italy

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 *** failure of all specimens was caused by the crack of bamboo fiber in the tensile *** the ultimate strength was reached,except specimens with a height of 600 mm,all other specimens could bear large deformation,showing good *** lateral displacements of the specimens under eccentric compression were approximately para-bolic in the direction of column *** ultimate bending moment of LBL columns with different slenderness ratios under compression with the same initial eccentricity was a fixed *** relationship between ultimate capacity,axial displacement,lateral displacement,and slenderness ratio was analyzed based on test *** 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.

关键词： laminated bamboo lumber column chamfer eccentric compression tangential

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Nodes Effect on the Bending Performance of laminated bamboo lumber Unit

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Journal of Renewable Materials 2021年第6期9卷 1143-1156页

作者： Yiwei Xuan Haitao Li Zhemin Bei Zhenhua Xiong Rodolfo Lorenzo Ileana Corbi Ottavia Corbi College of Civil Engineering Nanjing Forestry UniversityNanjing210037China Ganzhou Sentai bamboo Company Ltd. Ganzhou341001China University of Melbourne Melbourne3010Australia University College London LondonWC1E 6BTUK University of Naples Federico II Naples80133Italy

This research studied the ultimate bearing capacity of laminated bamboo lumber(LBL)unit and thereby calculated the maximum bending *** load-displacement chart for all specimens was *** the flexural capacity of members with and without bamboo nodes in the middle section was *** bending experiment phenomenon of LBL unit was *** failure modes of bending components were analysed and ***,the bending behaviour of LBL units is coMPared with other bamboo and timber *** is shown that the average ultimate load of BS members is 866.1 N,the average flexural strength is 101 MPa,the average modulus of elasticity is 8.3 GPa,and the average maximum displacement is 17.02 *** average ultimate load of BNS members is 1008.1 N,the average flexural strength is 118.02 MPa,the average modulus of elasticity is 9.9 GPa,and the average maximum displacement is 18.26 *** bamboo lumber(LBL)unit without bamboo nodes(BNS)has relatively higher flexural strength coMPared with LBL unit with bamboo nodes(BS).The presence of bamboo nodes reduces the strength of the entire *** failure modes were concluded for BS members,and two failure modes were observed for BNS members during the experimental *** to a coMParison between the LBL unit and other products,the flexural strength and bending modulus of elasticity of the LBL unit are similar as bamboo scrimber and raw bamboo components,which is much higher than timber components.

关键词： laminated bamboo lumber bending test flexural strength bamboo node

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