WIND - SAG Baumstatik eV

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8. Tree Models • Dominated by Greenhill (1880) concept • Trunk analysed, no branches • Conventional dynamic mathematics •Natural frequency KJ 48
Current dynamic tree models Woods, C.J. 1995 Oscillating response with a natural frequency KJ 49
Page 1 and 2: Tree Stability in Winds Ken James,
Page 3 and 4: Tree stability assessment Current m
Page 5 and 6: Structural Analysis of trees Struct
Page 7 and 8: STATIC Current methods of structura
Page 9 and 10: Tree shapes - branch are important
Page 11 and 12: Urban trees - branch sway dominates
Page 13 and 14: Measuring wind loads on trees- Stra
Page 15 and 16: Strainmeter • Attaches to base of
Page 17 and 18: Measuring wind loads on trees • A
Page 19 and 20: Dynamic sensors on trees N/S & E/W
Page 21 and 22: Wind Loads - Hoop pine KJ 21
Page 23 and 24: Wind Loads - Hoop pine Use data to;
Page 25 and 26: Palm • Height 18.1 m • dbh 0.43
Page 27 and 28: Wind Load - palm KJ 27
Page 29 and 30: Palm KJ ISA 2009 29
Page 31 and 32: Palms as structures •Flexible •
Page 33 and 34: Wind Load - palm KJ 33
Page 35 and 36: Wind dir Spotted gum, Monash Uni KJ
Page 37 and 38: Tree dynamics, E. grandis, wind loa
Page 39 and 40: Wind load (logarithmic) KJ ISA 2009
Page 41 and 42: Branch dynamics KJ 41
Page 43 and 44: Wind forces on branches! up or down
Page 45 and 46: Tree motion Harmonic motion Do tree
Page 47: Tree motion - harmonic Spectrum Pea
Page 51 and 52: New Dynamic Tree Model - with dynam
Page 53 and 54: Features of the new dynamic model A
Page 55 and 56: Tuned mass damped Structure Buildin
Page 57 and 58: Tuned mass damper 730 tonnes Reduce
Page 59 and 60: Real tree sway is complex Normal sp
Page 61 and 62: No mass damping, US - style KJ 61
Page 63 and 64: Static Pull test • Rope and contr
Page 65 and 66: Static pull test - Advantages • M
Page 67 and 68: Tree characteristics that influence
Page 69 and 70: AN example of tree stability Trees
Page 71 and 72: Tree heights 30 20 Urban trees Plan
Page 73 and 74: Tree height - convert to slendernes
Page 75 and 76: Plantation trees • Height 15m •
Page 77 and 78: Allometry - size and shape Human si
Page 79 and 80: Wind tunnel - scale model Small mod
Page 81 and 82: Tree Structural analysis Statics ve
Page 83 and 84: Dynamics - two masses Two masses Tw
Page 85 and 86: Dynamic solutions • Complex • S
Page 87 and 88: Pruning farm trees KJ ISA 2009 87
Page 89 and 90: Remove branches more sway occurs
Page 91 and 92: Pruning - comment James Urban 2008
Page 93 and 94: Fatality Melbourne Thur Jun 28, 200
Page 95 and 96: Failure is “not all at once” Ne
Page 97 and 98: Wind damage to tree - Burnley 3 Apr
Page 99 and 100:
Location - Monash Campus Building 3
Page 101 and 102:
Root plate KJ ISA 2009 101
Page 103 and 104:
Picture courtesy TreeLogic KJ ISA 2
Page 105 and 106:
Picture courtesy TreeLogic KJ ISA 2
Page 107 and 108:
Problem - Keep or remove Convention
Page 109 and 110:
Strainmeters on trunk KJ ISA 2009 1
Page 111 and 112:
Static Pull Results Pull North 56 k
Page 113 and 114:
Wind sensor and tree Cup anemometer
Page 115 and 116:
KJ ISA 2009 115
Page 117 and 118:
Spotted Gum - Biggest gust Wind dir
Page 119 and 120:
Wind loads - dynamic Static Pull No
Page 121 and 122:
North Wind Force Monash University,
Page 123 and 124:
Monash University, Wind Storm - 2 A
Page 125 and 126:
Peak moment during storm Static pul
Page 127 and 128:
Case study 2 Trees and Wind loading
Page 129 and 130:
20 m Pin Oak KJ ISA 2009 129
Page 131 and 132:
Pin Oak over concrete pipe Wind loa
Page 133 and 134:
Discussion - Statics and Dynamics
Page 135 and 136:
The End KJ ISA 2009 135
Page 137 and 138:
Tree - Cupressus sempervirens WIND
Page 139 and 140:
Cypress - dynamic motion KJ ISA 200
Page 141 and 142:
Red gum - unpruned APR08 Wind & Tre
Page 143 and 144:
Red gum - gust APR08 Wind & Trees S
Page 145 and 146:
Comparison - pre/post pruning Wind
Page 147 and 148:
Comparison - pre/post pruning APR08
Page 149 and 150:
1jan06 - k1419 E teretecornus #1 Sa
Page 151:
Wind Speeds Windthrow & Breakage Cu
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WIND - SAG Baumstatik eV

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