Wood-glass composites

Transkript

1 Wood-glass composites Micro-Project ECOLAR home (HTWG Konstanz), Solar Decathlon 2012, [Cited: November 16, 2015.] 1 Content Introduction General principle 3 examples Comparison Conclusion 2 1

2 Introduction consider glass elements for the load bearing system stiffening of wood frame structures in horizontal direction more transparent structures more passive energy gains less material needed more architectural freedom Kreativbox Fa. Gaulhofer: Schober, Peter. [Cited: November 16, 2015.] 3 Introduction The Glue: elastic glue (silicon or acrylate) continuous connection avoid stress concentrations allow relative displacements long-term behavior problematic thermal insulation water tightness wind insulation resistance to changes in temperature and humidity Schober, Peter. [Cited: November 16, 2015.] 4 2

3 Introduction The static system: glass in compression wood mainly in tension 5 The basic principle glass panel glue joint connecting frame wooden frame Wood-glass composite (Holz-Glas-Verbundkonstruktion: HGV) basic principle, Schober, Peter. [Cited: November 16, 2015.] 6 3

4 1) Wood-glass composite element designed by Austrian Cooperative Research shear connection connecting frame made of glued laminated birch wood or fiber reinforced polymer fixed on wooden frame with screws connecting frames with wave-structure Schober, Peter. e/schober_fassaden_aus_hgv_kurz.pdf. [Cited: November 16, 2015.] Hochhauser, Werner / Winter, Wolfgang / Fadai,Alireza. Entwicklung von verklebten Holz-Glaskonstruktionen. Wien: Technische Universität Wien, Institut für Architekturwissenschaften, Abteilung Tragwerksplanung, ) Wood-glass composite element designed by TU Wien L-shaped frame block settings (Verklotzungen) close to the edges Transmission of compressive stresses Schober, Peter. e/schober_fassaden_aus_hgv_kurz.pdf. [Cited: November 16, 2015.] Fadai, Alireza / Winter, Wolfgang. Aussteifende Holz-Glas-Fassaden Aussteifungssysteme. Wien: Abteilung für Tragwerksplanung und Ingenieurholzbau, Technische Universität Wien,

5 3) Joined research project BUWAL EPFL frame in 2 parts glued to the glass from both sides space to allow differential deformation load introduced by anchors Weinand, Prof. Dr. Yves. Holz-Glas-Verbund als großflächige Scheibensysteme zur Geäudeaussteifung. Lausanne: Lehrstuhl für Holzkonstruktionen IBOIS, IS-ENAC; EPF Lausanne, Comparison big glass surface, small frame easily fixed on construction site introduction of shear stresses introduction of compressive stresses easily fixed on construction site transmission of stresses less uniform very big glue surface uniform introduction of stresses bigger frame surface, less transparency anchors must be fixed in glass works 10 5

6 Conclusion wood-glass composites help to make structures more transparent connection must introduce stresses uniformly and allow differential displacements wave-structure good to reduce frame surface and increase glass surface block settings increase load bearing capacity (compressive stresses) big glue surface desirable to introduce stresses continuously minimize frame size to maximize positive effects 11 Questions? Kittel, Robert / Fotografie: Knapp. Die wahren Abenteuer sind im Kopf. Holzbau Austria,