Laminated Solid Timber Slab with Transverse Prestressing Using the Strategy of Interleaved Vertical Displacement of Lamellae  

作　　者：Bianca Bispo dos Reis Jorge Daniel de Melo Moura Marcos Vinício de Camargo Everaldo Pletz 

机构地区：[1]Graduate Program in Architecture and Urbanism,Londrina State University,Jardim Portal de Versalhes 1,Londrina 86057-970,PR,Brazil [2]Department of Civil Engineering,Federal Technological University of Paraná(UTFPR),Apucarana 86812-460,PR,Brazil [3]Retired professor Department of Structural Engineering,Londrina State University,Londrina 86057-970,PR,Brazil

出　　处：《Journal of Civil Engineering and Architecture》2024年第4期186-198,共13页土木工程与建筑（英文版）

摘　　要：This article presents a study on the structural behavior of transversely prestressed laminated timber slabs,focusing on an innovative approach:vertically misaligned lamellae.This misalignment,achieved by sliding vertically the wooden lamellae rather than aligning them,enhances the slab’s cross-section moment of inertia,thereby improving load-bearing capacity and stiffness.Testing involved two groups of structural size specimens:one with vertically aligned lamellae(control group)and the other with misaligned lamellae(study group).Results showed the study group exhibited 42%superior stiffness and 10%less load capacity compared to the control.Failures typically occurred individually in the lamellae,particularly in those with defects or lower modulus of elasticity,concentrated in the middle third of the slabs’free span where tensile stresses peak.Despite a higher number of failed lamellae,the study group demonstrated promising performance.Analysis of prestressing bar indicated no damage at all in the thread,suggesting potential for reducing bar diameter.These findings offer crucial insights into applying these slabs in timber construction as well as to any kind of construction.

关 键 词：Transversal prestressed slabs wooden construction plantation wood flexural testing design methodology 

分 类 号：TU52[建筑科学—建筑技术科学]