Project no.: Date:Made by: Page no.:

Dowel calculation for panel to resist shear load

Shear load, V, = 15.00 KN (Wind force acting on the whole panel )Maximum factored shear load, V, = 22.50 KN

PARAMETERS:V = KN (design ultimate shear load)

fy = MPa (characteristic strength of reinforcement)

(Table 5.3) 0.70 (tangent of the angle of internal friction between the faces of the joint)

REQUIRED DOWELS FOR PANEL

22.50460.00

tan αғ =

PROJECT: 132/11kV GRIDSTATION AT WATANI

1593 February 23, 2013

CALCULATION:

(Eqn. 6) As = Fb / (0.87 fy) ; where Fb = V / (0.65 tan αғ)

Fb = 22500.00N / (0.65 x 0.70)Fb = 49450.55N

Therefore:Asreqd = 49450.55N / (0.87 x 460MPa)

Asreqd = 123.56mm²

Provide: 3 dia. 20 dowel

Asprov = 3 x 314.16mm²Asprov = 942.48mm² > As reqd

Provide 3 T 20 for dowel connection at panel base and foundation structure, which is very adequate

Project no.: Date:Made by: Page no.:

REQUIRED DOWELS FOR PANEL

PROJECT: 132/11kV GRIDSTATION AT WATANI

1593 February 23, 2013

Check anchorage length for panel dowel bars

PARAMETERS:fcu = MPa (characteristic strength of concrete)

db = mm (effective bar size)

(Table 3.26) β = (bond coefficient depedent on bar type)

Fs = (factored total maximum shear force for each dowel)= KN

CALCULATION:(Eqn. 49) Design bond stress, fb = β(fcu)1/2

fb = 0.50(40.0)^½ = 3.16MPa

(Eqn. 48) fb = Fs / (π db L) ; L = Fs / (π db fb)L = 7500.00 / [π(20)(3.16)]L = 37.75 mm ~ 600.0 mm

Provide 3 T 20 dowel for connection between the Panel and foundation structure, anchored at 600mm deep

0.5022.5/37.50

40.0020.0