Timber Frame Tension Joinery - Timber Frame Engineering Council

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half-timber a traditional name for a common European framing system which used timbers that were split in half housing linear potentiometer a cavity large enough to hold the entire timber’s end an electronic device that measures displacements by returning a voltage signal that changes relative to the displacement longitudinal direction l v along the centerline of the tree (parallel to the grain) the distance from the center of the peg to the end of the tenon, end distance Mode II a single shear failure mode in which the peg rotates through both members Mode III a single or double shear failure mode in which the peg rotates through the main or side member(s) and a plastic hinge forms in the other member(s) Mode I a single or double shear failure mode in which dowel bearing failures occur in either the main or side member(s) Mode IV a single or double shear failure mode in which plastic hinges occur in the main and side member(s) Mode V Mode VI Mode VII mortise NDS a peg shear failure mode a failure mode in which the relish fails in shear a failure mode caused by mortise splitting a hole cut into a member in which the tenon is fit The National Design Specification for Wood Construction (see Bibliography) x
normal distribution orthotropic material a statistically ideal distribution of data about a mean value material that has significant strength differences along each axis of strength. These axes are 90° to each other. pith the small core of soft, spongy tissue located at the center of tree stems, branches and twigs plastic hinge a flexural hinge that develops in a dowel caused by material yielding plastically in tension and compression platform framing a method of timber construction similar to balloon framing that uses common elements and standard dimensions to create walls and floors that rest upon the platform below pressure transducer an electronic device that measures pressure in a system (such as a hydraulic system) by returning a voltage signal which changes relative to the changing pressure in a system radial direction the direction out from the center of the tree R e the ratio of dowel bearing strengths (F em /F es ) Recycled <strong>Timber</strong> timber that came from an older building to be used again in a newer one relish the material directly behind the peg at the end of the tenon R t the ratio of member thicknesses (t m /t s ) shear span shear strength the distance between the loading block and the reaction block the average shear stress on a cross-section at failure under shear loading xi
Page 1 and 2: TIMBER FRAME TENSION JOINERY Richar
Page 3 and 4: Acknowledgments Acknowledgments go
Page 5 and 6: 5.4 Dowel Bearing Test Results.....
Page 7 and 8: List of Figures Page Figure 1-1 Typ
Page 9 and 10: List of Appendices Page Appendix A
Page 11: elasto-plastic behavior an ideal yi
Page 15 and 16: xiii
Page 17 and 18: Tie Beam Figure 1-2 American Timber
Page 19 and 20: 2. Timber Framing Background 2.1 Hi
Page 21 and 22: territories. Using the new construc
Page 23 and 24: Although timber framing is still a
Page 25 and 26: 3. European Yield Model and Propose
Page 27 and 28: strength, then the dowel could bend
Page 29 and 30: P III s = k3 ⋅D⋅ts ⋅F ( 2 + R
Page 31 and 32: The areas under the shear diagram c
Page 33 and 34: and F es = 1728 psi) (see Sections
Page 35 and 36: Figure 3-7 Combined Shear - Bending
Page 37 and 38: 3.5 Additional Yield Model Equation
Page 39 and 40: need to know the required load and
Page 41 and 42: Using the equivalent bolt diameter,
Page 43 and 44: 4. Peg Testing Procedures and Analy
Page 45 and 46: dowel diameter and the intercept of
Page 47 and 48: were taken for two orientations (e.
Page 49 and 50: affected by the deformation in the
Page 51 and 52: Figure 4-6 Orientation of Prelimina
Page 53 and 54: The main purpose of the full-size t
Page 55 and 56: 5. Test Results 5.1 Introduction Th
Page 57 and 58: Table 5-1 Bending Test Correlation
Page 59 and 60: Table 5-4 Bending Yield Strength Re
Page 61 and 62: 5.3 Shear Test Results 181 shear te
Page 63 and 64:
0.90 0.90 Specific Gravity 0.80 0.7
Page 65 and 66:
Yield Stress τ (psi.) 3/4" Red Oak
Page 67 and 68:
5.4 Dowel Bearing Test Results The
Page 69 and 70:
obtained from shear tests at variou
Page 71 and 72:
To obtain allowable stress design v
Page 73 and 74:
l e l v Figure 6-1 Full-size Test D
Page 75 and 76:
each mode in the general yield mode
Page 77 and 78:
7. Conclusions and Recommendations
Page 79 and 80:
Appendix A Derivation of Dowel Rota
Page 81 and 82:
Appendix C NDS Yield Mode II, Alter
Page 83 and 84:
Appendix D NDS Mode III s , Alterna
Page 86 and 87:
Appendix E Standard Test Setup for
Page 88 and 89:
Appendix G Bending Test Data Summar
Page 90 and 91:
Summary of Bending Tests: Last Revi
Page 92 and 93:
Appendix H Shear Test Data Summary
Page 94 and 95:
Summary of 1-1/4" Red Oak Shear Tes
Page 96 and 97:
Summary of 1" White Oak Shear Tests
Page 98 and 99:
Appendix I Dowel Bearing Data Summa
Page 100 and 101:
Bibliography Abe M., and Kawaguchi,
Page 102:
Soltis, L. A.; Karnasudirdja, S.; L
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Timber Frame Tension Joinery - Timber Frame Engineering Council

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