Influence of slenderness ratio and sectional geometry on the axial compression behavior of original bamboo columns

Nie, Yuhan; Wei, Yang; Huang, Linjie; Liu, Ying; Dong, Fenghui

doi:10.1186/s10086-021-01968-6

Cited by 23 publications

(10 citation statements)

References 39 publications

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“…It was observed that bamboo has excellent ability to resist buckling when subjected to bending and shear [23] and local buckling is not considered as a critical mechanism [50]. As local buckling depends on adjusting the slenderness ratio and diameterthickness ratio [51], the tapering structure of bamboo would be the cause of this ability. Therefore, future study should consider the relationship between the tapering structure of bamboo and the critical moment for local buckling.…”

Section: Discussionmentioning

confidence: 99%

Stress control mechanism by fiber distribution

Chalermsin,

Kanahama,

Sato

2024

Preprint

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This study aims to determine the optimal design of fibers that can minimize circumferential bending stress from the morphology of “bamboo,” which is considered a “natural functionally graded material (FGM)” because vascular bundles are distributed unevenly across its cross-section. Further, vascular bundles are crucial for determining the mechanical properties of bamboo, and their distribution is not random. This study analyzes bias distribution from the viewpoint of structural mechanics. Longitudinal splitting is a dominant failure mode in both bamboo and fiber composites, it is mainly caused by circumferential bending tensile stress. The bamboo was modelled as a hollow cylinder, and a circumferential bending stress equation was formulated. As a result, the vascular bundles distribution of the bamboo minimized the circumferential bending stress on the inner surface of the cross-section throughout the culm. These suggest that bamboo is a smart plant that can control its distribution based on regions more prone to failure, e.g., where cracks occur first on the inner surface. This study can help obtain the optimal stress-controlled design of fiber-reinforced composites and understand the morphological design of bamboo.

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Section: Discussionmentioning

confidence: 99%

Stress control mechanism by fiber distribution

Chalermsin,

Kanahama,

Sato

2024

Preprint

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“…Contoh uji berukuran penuh yang diberikan satu beban terpusat dikategorikan sebagai balok pendek (RB≤10). Rasio kelangsingan yang berkisar antara 10 hingga 20, spesimen menunjukkan karakteristik balok atau kolom pendek [48]. Nilai RB contoh uji berukuran penuh pada pengujian ini dipengaruhi oleh ukuran penampang balok dan tumpuan lateral.…”

Section: Faktor Stabilitas Balok (Cl)unclassified

Faktor Stabilitas Balok Kayu pada Konfigurasi Pembebanan Terpusat

Hayatunnufus¹,

Nugroho²,

Bahtiar³

2022

J-Sil

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The use of wood as a building material must be designed quite rigid and strong. According to SNI 7973:2013, the corrected design value on the wooden structure components must be in accordance with the condition of wood to be used. The objective of this study is to determine the value of timber beams stability (CL) both of softwood and hardwood based on SNI 7973:2013 for construction purposes. The material in this research to be used are pine (Pinus merkusii), agathis (Agathis dammara), mahagony (Swietenia macrophylla), and red meranti (Shorea leprosula). Testing of physical properties include moisture content, specific gravity, and density, meanwhile testing of mechanical properties include flexural strength, modulus of elasticity, and ductility. Mechanical testing is carried out on a small clear specimens and full-size specimens, while the physical properties are tested only on a small clear specimens. The full-size specimens are visually sorted and the strength ratio (S) is determined prior to mechanical testing. The result of this study showed that the highest strength ratio was in meranti 55.85%, agathis 52.98%, pine 46.76%, and mahogany 46.60%. Softwood has a lower S value to more knot defects than hardwood. The slenderness ratios of agathis, pine, mahogany, and meranti wood respectively are 7.48, 7.45, 7.40 and 7.66 so that all specimens are referred to as short beams. The value of beam stability (CL) is close to 1 that indicates that the beams are stable and does not twist.

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“…Bamboo is considered a new material with great market potential among natural fibers [ 24 , 25 , 26 , 27 ] and has been widely used in civil engineering structures, such as short-span footbridges, low-rise houses, long-span roofs and construction envelopes [ 28 , 29 , 30 , 31 ]. The original bamboo tube, as a natural fiber tube structure, has attracted the attention of scholars [ 32 , 33 , 34 ]. Umer et al [ 35 ] investigated the energy-absorbing characteristics of a range of lightweight bamboo-reinforced foam structures.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of Foam-Filled Bamboo Composite Tubes under Axial Compression

et al. 2022

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In this paper, a new type of polyurethane foam-filled bamboo composite tube is proposed. Axial compression tests were carried out on unfilled and polyurethane foam-filled bamboo composite tubes. The effects of the foam filler, diameter (50 and 100 mm) and number of winding layers (10, 15 and 20 layers) on the failure mode and energy absorption capacity of the tubes were studied. The test results showed that the failure mode of the unfilled tube was buckling failure, while that of the foam-filled tube was pressure-bearing failure, and the latter was more abrupt. The foam filler enhanced the stability of the wall of the unfilled tube. The interaction between them further increased the bearing capacity of the foam-filled tube and showed a higher platform load at a later stage. In terms of the absorbed energy, specific absorbed energy and average crush load, not all foam-filled tubes were superior to unfilled tubes. However, reducing the height of the bamboo composite tube and increasing the number of winding layers of the bamboo composite tube can effectively increase the positive effect of the foam filler on energy absorption.

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Influence of slenderness ratio and sectional geometry on the axial compression behavior of original bamboo columns

Cited by 23 publications

References 39 publications

Stress control mechanism by fiber distribution

Stress control mechanism by fiber distribution

Faktor Stabilitas Balok Kayu pada Konfigurasi Pembebanan Terpusat

Mechanical Behavior of Foam-Filled Bamboo Composite Tubes under Axial Compression

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