Development of wooden block shear wall – Improvement of stiffness by utilizing elements of densified wood
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Ivón Hassel
Abstract
The objective of this research was to study the performance of a wooden block shear wall which utilizes compressed wood as a connecting element in place of the traditional metal connectors. The compressed wood was made by compressing Japanese cedar (Cryptomeria japonica) to a compression ratio of 63% without fixation treatment. The connecting elements, namely diamond keys (DKs), recover their radial compressed dimension when absorbing moisture. The expansion of the wood causes a tighter fit of the wood blocks, thereby improving the system stiffness. DKs work as fuses by absorbing most of the stress and damage. This allows the structure to be readjusted and reused after earthquakes. The wooden blocks are made of glued-laminated timber based on European red pine (Pinus sylvestris). The behavior of the wall was studied by means of a finite element method (FEM) and full-scale shear tests. The material properties were found by performing mechanical tests, using digital image analysis, and strain gauges to measure the strain. The stiffness of the wall and how it is affected by the DKs are described. The FEM provided predictions which are in agreement with experimental results of wood block wall systems. The addition of DKs increased the stiffness by up to 2.5-fold. Future improvement of FEM will include accounting for the contribution of vertical connectors and out-of-plane forces.
©2008 by Walter de Gruyter Berlin New York
Articles in the same Issue
- Original Papers
- Studies on the dehydrogenative polymerizations (DHPs) of monolignol β-glycosides: Part 4. Horseradish peroxidase-catalyzed copolymerization of isoconiferin and isosyringin
- Studies on the dehydrogenative polymerization of monolignol β-glycosides: Part 5. UV spectroscopic monitoring of horseradish peroxidase-catalyzed polymerization of monolignol glycosides
- Monolignol dehydrogenative polymerization in vitro in the presence of dioxane and a methylated β-β′ dimer model compound
- Structural characterization of milled wood lignins from different eucalypt species
- FTIR spectroscopy in combination with principal component analysis or cluster analysis as a tool to distinguish beech (Fagus sylvatica L.) trees grown at different sites
- Hydrothermal dissolution of mixed southern hardwoods
- Characterisation of fines from unbleached kraft pulps and their impact on sheet properties
- Effects of refining steam pressure on the properties of loblolly pine (Pinus taeda L.) fibers
- Elastic deformation mechanisms of softwoods in radial tension – Cell wall bending or stretching?
- Fiberboard bending properties as a function of density, thickness, resin, and moisture content
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- Development of wooden block shear wall – Improvement of stiffness by utilizing elements of densified wood
- Significance of the heating rate on the physical properties of carbonized maple wood
- Exploring Scots pine fibre development mechanisms during TMP processing: Impact of cell wall ultrastructure (morphological and topochemical) on negative behaviour
- Pentachlorphenol migration from treated wood exposed to simulated rainfall
- Resistance of Trichoderma harzianum to the biocide tebuconazol – Proposed biodegradation pathways
- Short Notes
- On the variation of acid-labile aryl ether unit content in wood lignin
- Coumarins and secoiridoid glucosides from bark of Fraxinus rhynchophylla Hance
- Antifungal activities of heartwood extracts of Port-Orford cedar extractives
- Antifungal secoabietane dialdehyde and bisabolane-type terpenoids from the heartwood of Cryptomeria japonica D. Don
- Meetings
- Meetings
Articles in the same Issue
- Original Papers
- Studies on the dehydrogenative polymerizations (DHPs) of monolignol β-glycosides: Part 4. Horseradish peroxidase-catalyzed copolymerization of isoconiferin and isosyringin
- Studies on the dehydrogenative polymerization of monolignol β-glycosides: Part 5. UV spectroscopic monitoring of horseradish peroxidase-catalyzed polymerization of monolignol glycosides
- Monolignol dehydrogenative polymerization in vitro in the presence of dioxane and a methylated β-β′ dimer model compound
- Structural characterization of milled wood lignins from different eucalypt species
- FTIR spectroscopy in combination with principal component analysis or cluster analysis as a tool to distinguish beech (Fagus sylvatica L.) trees grown at different sites
- Hydrothermal dissolution of mixed southern hardwoods
- Characterisation of fines from unbleached kraft pulps and their impact on sheet properties
- Effects of refining steam pressure on the properties of loblolly pine (Pinus taeda L.) fibers
- Elastic deformation mechanisms of softwoods in radial tension – Cell wall bending or stretching?
- Fiberboard bending properties as a function of density, thickness, resin, and moisture content
- Modification of Fagus sylvatica (L.) with 1,3-dimethylol-4,5-dihydroxyethylene urea (DMDHEU): Part 1. Estimation of heat adsorption by the isosteric method (Hailwood-Horrobin model) and by solution calorimetry
- Development of wooden block shear wall – Improvement of stiffness by utilizing elements of densified wood
- Significance of the heating rate on the physical properties of carbonized maple wood
- Exploring Scots pine fibre development mechanisms during TMP processing: Impact of cell wall ultrastructure (morphological and topochemical) on negative behaviour
- Pentachlorphenol migration from treated wood exposed to simulated rainfall
- Resistance of Trichoderma harzianum to the biocide tebuconazol – Proposed biodegradation pathways
- Short Notes
- On the variation of acid-labile aryl ether unit content in wood lignin
- Coumarins and secoiridoid glucosides from bark of Fraxinus rhynchophylla Hance
- Antifungal activities of heartwood extracts of Port-Orford cedar extractives
- Antifungal secoabietane dialdehyde and bisabolane-type terpenoids from the heartwood of Cryptomeria japonica D. Don
- Meetings
- Meetings
