Radiusholz Curved Cross Laminated Timber (CLT) Elements
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1 Radiusholz Curved Cross Laminated Timber (CLT) Elements Picture reference: G. Stecher, A. Kraler, R. Maderebner
2 PROJECT RADIUSHOLZ Idea: Automated production of curved CLT-elements First feasibility study (2008) Determination of the stiffnes and the strength parameters Effects of tension perpendicular to the grain - to the bending- and rolling shear stress Laboratory experiments G. Stecher, A. Kraler, R. Maderebner Z Y X 2
3 LABORATORY EXPERIMENTS ACCORDING TO pren Bending tests with loads perpendicular to the plane Shear tests with loads perpendicular to the plane Bending test with loads in plane direction Shear test with loads in plane direction G. Stecher, A. Kraler, R. Maderebner 3
4 SAMPLE GROUP type description quantity number of layers layer thickness radius [-] [-] [-] [mm] [m] 1 panel - bending ,5 2 panel - bending ,5 3 panel - thrust ,5 4 panel - thrust ,5 5 plate - bending plate - bending plate - thrust plate - thrust G. Stecher, A. Kraler, R. Maderebner 4
5 TESTING SETUP SUPPORT GEOMETRY support geometry - cut support support geometry steel plate support geometry - chock G. Stecher, A. Kraler, R. Maderebner 5
![NUMERICAL CALCULATION MODEL Z Y X Normalspannungen σ x [N/mm 2 ] 40.0 32.7 25.5 18.](/docs-images/78/76974518/images/6-5.jpg "2 10.9 3.6-3.6-10.9-18.2-25.5-32.7-40.0 Max : 34.6 Min : -67.")
6 NUMERICAL CALCULATION MODEL Z Y X Normalspannungen σ x [N/mm 2 ] Max : 34.6 Min : normal stress in local x-direction (bending stress); σ m,x,σ c,0, σ t,0 normal stress in local y-direction (transverse stress); σ c,90,σ t,90 shear stress xz G. Stecher, A. Kraler, R. Maderebner 6
7 Bending test with loads perpendicular to the plane according to pren G. Stecher, A. Kraler, R. Maderebner 7
8 Bending test with loads perpendicular to the plane according to pren Type 2 G. Stecher, A. Kraler, R. Maderebner 8
9 Bending test with loads perpendicular to the plane according to pren Type 2 Transverse tensile deformation Global modulus of elasticity in bending Local modulus of elasticity in bending G. Stecher, A. Kraler, R. Maderebner 9
10 Bending test with loads perpendicular to the plane according to pren Type 2 G. Stecher, A. Kraler, R. Maderebner 10
11 Bending test with loads perpendicular to the plane according to pren Type 1 G. Stecher, A. Kraler, R. Maderebner 11
12 Bending test with loads perpendicular to the plane according to pren Type 1 G. Stecher, A. Kraler, R. Maderebner 12
13 Shear test with loads perpendicular to the plane according to pren G. Stecher, A. Kraler, R. Maderebner 13
14 Shear test with loads perpendicular to the plane according to pren Type 3 G. Stecher, A. Kraler, R. Maderebner 14
15 Shear test with loads perpendicular to the plane according to pren Type 3 G. Stecher, A. Kraler, R. Maderebner 15
16 Shear test with loads perpendicular to the plane according to pren Type 4 G. Stecher, A. Kraler, R. Maderebner 16
17 Shear test with loads perpendicular to the plane according to pren Type 4 G. Stecher, A. Kraler, R. Maderebner 17
18 Bending test with loads in plane direction according to pren G. Stecher, A. Kraler, R. Maderebner 18
19 Bending test with loads in plane direction according to pren Type 5 Type 6 G. Stecher, A. Kraler, R. Maderebner 19
20 Shear test with loads in plane direction according to pren G. Stecher, A. Kraler, R. Maderebner 20
21 Shear test with loads in plane direction according to pren Type 7 Type 8 G. Stecher, A. Kraler, R. Maderebner 21
22 SUMMARY 72 curved cross laminated timber specimens 72 straight cross laminated timber specimens bending stiffness and shear stiffness bending strength and shear strength transverse tensile deformations interaction of bending stresses as well as rolling shear stresses with transverse stresses G. Stecher, A. Kraler, R. Maderebner 22
23 Thank you for your attention G. Stecher, A. Kraler, R. Maderebner 23
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