Mechanical Properties of Moso Bamboo Connections with External Clamp Steel Plates

Nie, Shidong; Song, Ran; Wu, Di; Chen, Jieyu; Wang, Hui; Wei, Qike

doi:10.32604/jrm.2022.017275

Cited by 7 publications

(11 citation statements)

References 11 publications

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“…Compared with the external clamp steel plate connection without filling grouting material [25], the bearing capacity of the connection with embedded steel plate and grouting material is improved. The average ultimate bearing capacity of the external clamp steel plate connection is 13 kN, while that of the embedded steel plate and grouting connection is 18.75 kN, which is 44.2% higher than that of the external steel plate connection.…”

Section: The Bearing Capacity Comparison With Other Connection Modesmentioning

confidence: 99%

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Experimental Study of Moso Bamboo to-Steel Connections with Embedded Grouting Materials

Nie¹,

Fu²,

Wang³

et al. 2023

Journal of Renewable Materials

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Moso bamboos have attracted excessive attention as a renewable green building material to the concept of sustainable development. In this paper, the 20 bolted Moso bamboo connection specimens with embedded steel plates and grouting materials were designed according to connection configurations with different bolt diameters and end distance of bolt holes, and their bearing capacities and failure modes were analyzed by static tension tests. According to the test results of all connectors, the failure modes of the specimens are divided into four categories, and the effects of bolt diameter and bolt hole end distance on the connection bearing capacity and failure mode are analyzed. The test results show that the deformation and failure process can be divided into four stages. The main influence factor of connector bearing capacity is bolt diameter. Connectors can be divided into four failure modes, and brittle failure can be avoided by adopting certain structural measures. Filling with grouting material can improve the bearing capacity of joints. Due to the large variability of bamboo, further experiments are needed.

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Section: The Bearing Capacity Comparison With Other Connection Modesmentioning

confidence: 99%

mentioning

confidence: 99%

Experimental Study of Moso Bamboo to-Steel Connections with Embedded Grouting Materials

Nie¹,

Fu²,

Wang³

et al. 2023

Journal of Renewable Materials

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“…• Huecas, con aditamentos externos de refuerzo y sujeción La presencia de pernos que perforan al bambú produjo tres tipos de fallos (Nie et al, 2022): por cortante del perno (ruptura total), fallo dúctil (por aplastamiento o deformación del orificio bajo tensión continua) y fallo por punzonamiento (se fractura y se hunde la superficie exterior del bambú a ambos lados del perno). Estas fallas se produjeron a causa de los espacios que quedan en la superficie externa del bambú, entre los elementos que conforman la unión (culmo, perno y placas).…”

Section: Uniones Con Perforaciones En El Culmounclassified

“…Estas fallas se produjeron a causa de los espacios que quedan en la superficie externa del bambú, entre los elementos que conforman la unión (culmo, perno y placas). A mayor espacio, aumentó el riesgo de fallo (Nie et al, 2022). Estas condiciones propiciaron momentos de flexión adicionales por esfuerzos cortantes del perno, que falló al usar diámetros pequeños (M8 y M10).…”

Section: Uniones Con Perforaciones En El Culmounclassified

Uniones estructurales de bambú: criterios de su desempeño a partir de ensayos.

Hurtado

2023

MQRInvestigar

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Las primeras normas de construcción con bambú se publicaron a inicios del presente siglo, por lo que no pueden considerarse acabadas. Dentro de ellas, las conexiones, por su extrema complejidad, constituyen elementos poco definidos y son un reto para el diseño estructural. Esto, unido a las características físicas del bambú, es decir, su alta variabilidad, presencia de culmos huecos, de sección curva no uniforme en toda su longitud, no perfectamente rectos y de espesor relativamente pequeño, incrementan la dificultad para el cálculo y hace necesario utilizar diseños que logren resistencia y seguridad. Por ello se realizó una revisión integrativa de investigaciones publicadas, basadas en ensayos estructurales con diferentes tipos de estas uniones. El objetivo fue determinar los tipos de conexiones que ofrecen mejor desempeño estructural según los resultados de ensayos, identificar los principales elementos que contribuyen a su fallo y emitir consideraciones de diseño que permitan incrementar su resistencia y durabilidad. La búsqueda bibliográfica abarcó 287 documentos, utilizando pares de palabras clave. Se seleccionaron los 12 artículos originales que mostraron ensayos realizados con dichas conexiones. Los resultados indicaron la necesidad de utilizar conexiones reforzadas, sin perforaciones ni cortes en el culmo, a través del uso de abrazaderas, que permiten diseños flexibles y sencillos. Los estudios publicados a partir de la realización de ensayos en uniones de bambú son escasos, por lo que es imprescindible el desarrollo de investigaciones de este tipo que provean de herramientas prácticas y confiables a los profesionales que trabajan con estos sistemas.

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“…In view of the above problems, people have carried out a lot of work to explore [11]. Studies have shown that low molecular weight adhesives can enter a large number of broken cell cavities causing by the defibering process, which contributes to immobilize parenchyma cells in the subsequent process of hot pressing.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Two-Step Saturated Steam Heat Treatment Process on the Properties of Reconstituted Bamboo

Han¹,

Lou²,

Yuan³

et al. 2022

Journal of Renewable Materials

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With the aim of utilizing reconstituted bamboo as a carbon cycle-oriented material, the improvement of physical and mechanical properties has been actively studied to solve using problems. The saturated steam heat treatment process has been widely used in worldwide. With the development and exploration of this technology, two-step saturated steam heat treatment process appears in some practical production, that is, after a period of saturated steam heat treatment at a lower temperature, the bamboo bundles are taken out and seasoned for a period of time, and then put back into the heat tank again, and heated at a higher temperature for another period of time. During the two-step saturated steam heat treatment, the physical and mechanical properties of bamboo changed. However, the mechanism of two-step saturated steam heat treatment has not been thoroughly discussed. For purpose that this paper all discuss and find out the mechanism of two-step saturated steam heat treatment on the change of physical and mechanical properties of reconstituted bamboo. In this work, the one and two-step saturated steam heat treatments were carried out according to the actual production parameters, and the physical and mechanical properties of the reconstituted bamboo board made of treated bamboo bundles were analyzed, including the color change, the thickness swelling (TS), modulus of elasticity (MOE), modulus of rupture (MOR) and shear strength. The results indicate that two-step saturated steam heat treatment is better than one-step. Based on the detailed study of the chemical composition, crystallinity and micro-morphological characteristics of the heated bamboo bundles, it is further revealed that during two-step saturated steam heat treatment, oxygen air is added to the reaction system between the two heat treatment processes to further catalyze the oxidation of hemicellulose and enhance the crystallinity of cellulose, so as to improve the properties of the final products. Our work has optimized the saturated steam heat treatment process which is widely used in industry, pointing out a new idea in the experimental and theoretical basis for the development of recombinant bamboo manufacturing industry.

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Mechanical Properties of Moso Bamboo Connections with External Clamp Steel Plates

Cited by 7 publications

References 11 publications

Experimental Study of Moso Bamboo to-Steel Connections with Embedded Grouting Materials

Experimental Study of Moso Bamboo to-Steel Connections with Embedded Grouting Materials

Uniones estructurales de bambú: criterios de su desempeño a partir de ensayos.

Study on the Effect of Two-Step Saturated Steam Heat Treatment Process on the Properties of Reconstituted Bamboo

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