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Eucalyptus globulus finger jointed solid timber and glued laminated timber with superior mechanical properties: Characterisation and application in strained gridshells
Construction and Building Materials ( IF 7.4 ) Pub Date : 2020-08-10 , DOI: 10.1016/j.conbuildmat.2020.120355
Antonio José Lara-Bocanegra , Almudena Majano-Majano , Francisco Arriaga , Manuel Guaita

This work establishes the main guidelines to produce high-performance Eucalyptus globulus Labill finger jointed solid timber and glued laminated timber laths and analyse their potential for application in multilayer strained gridshells. To this end, a proposal for strength grading of eucalyptus solid timber is firstly provided, combining visual and mechanical criteria. The bending strength of industrially produced eucalyptus finger jointed solid timber ​​and glued laminated timber laths using different wood grades and two adhesives (1C-PUR and MUF) is investigated. The results suggest that strength classes D55 for finger jointed solid timber and GL56 for glued laminated timber could be reached by appropriately graded solid timber and adhesive. Moreover, the superior performance of eucalyptus products over those made of other species in terms of the minimum design radius of curvature, considering rheological aspects, and the stiffness of multilayer curved systems with semi-rigid connections as shown by FEM analysis, is discussed. Finally, eucalyptus products are successfully used in two full-scale strained gridshells, highlighting the promising future for this species here.



中文翻译:

具有卓越机械性能的球墨桉桉接缝实木和胶合层压木材:表征和在应变板壳中的应用

这项工作建立了生产高性能桉树球的主要指导方针Labill指接实木和胶合层压板条,并分析了它们在多层应变栅板中的应用潜力。为此,结合视觉和机械标准,首先提出了桉木实木强度分级的建议。研究了使用不同木材等级和两种粘合剂(1C-PUR和MUF)的工业生产的桉木指接实木和胶合层压板条的抗弯强度。结果表明,通过适当分级的实木和胶粘剂可以达到指接实木的强度等级D55和胶合的层压木材的强度等级GL56。此外,考虑到流变方面,在最小设计曲率半径方面,桉树产品的性能优于其他物种。讨论了半刚性连接的多层弯曲系统的刚度,如有限元分析所示。最后,桉树产品已成功用于两个全尺寸应变栅栏,凸显了该树种的广阔前景。

更新日期:2020-08-11
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