- •Section 1 General
- •Material and Allowable Stress
- •Pressure Lining Part
- •I: Interval of stiffeners (cm)
- •It: Moment of inertia of stiffener (cm4)
- •V: Coefficient of kinetic viscosity of flow for water at 20°c 1.0 X io-6 (m2/s)
- •Attachment Installations
- •28 Days design standard strength of concrete (kgf/cm2)
- •Chapter 2 hydraulic gate Section 1 General 1
- •Gate Leaf, Gate. Guide and Anchorage
- •13 : Temp, rising ratio 5.6°c/h (10°f/h) c : Temp, rising ratio 8.4°c/h (15°f/h)
- •Gate Hoist
- •I: Geometrical moment of inertia (cm4) I: Distance between supports of a spindle (cm)
- •Fixed Wheel Gate
- •Radial Gate
- •Long Span Gate
- •Bottom Hinge Flap Gate
- •High Pressure Gates and Valves
- •Velocity of flow
- •Selective Water Withdrawal Equipment and Surface Water Withdrawal Equipment
- •XGatc leaf
- •Trash Rack
- •Section 1 General
- •Section 3 Fabrication and Installation
- •Test piece width/test piece thickness (w/t) Standard tensile strength of hand welding joint
- •Standard tensile strength of automatic welding joint
- •Example (1) Net width of the arrangement of tightening holes as il- lustrated in Fig. 5.6-1 is as follows:
- •Section 2 Riveted Joints
- •Table 5.8-1 Combination of Materials, of Rivets and Parent Metals
- •Section 3 High Strength Bolt Joints
- •Table 5.16-1 Correction of Offset
- •Table 5.16-4 Torque Coefficient
- •. Section 4 Bolted Connections
- •Chapter 6 safety and sanitation
- •I: Geometrical moment of inertia of wheel rail (cm4)
(3) Force due to internal pressure at reducer
for the pipe on upstream P3 = HT(AX-A^
for the pipe on downstream P3' =HT’ (Ax' — A2')
where, HTt HT' : Internal pressure at the center of the reducer (tf/m2), design pressure for normal condition and the static pressure for- seismic condition
Ax, Ax' : Sectional area of the upstream pipe of the reducer (m2)
>42, /12' : Sectional area of the downstream pipe of the reducer (m2)
4
where k: Stress of concrete (kgf/cm2)
P: Load per wheel (kgf)
bf. Bottom width of wheel rail (cm)
Em: Concrete modulus of elasticity = 1.4 x 105 (kgf/cm2)
■ E: Steel)irfbdulus of elasticity =’2.1 x 106 (kgf/cm2)
I: Geometrical moment of inertia of wheel rail (cm4)
2a: Stress distribution length of concrete at the bottom of the wheel rail (cm)
M: Bending moment of the wheel rail (kgf-cm)
* = 2.34 *= 1.77 *=1.60 *=1.73
Fig. 2.71-1 Shapes & Factors of the Trash Rack
1
where <jf: Yield point of material (kgf/cm2)
g= 1.5 —0.5- ——
(1 + 0.002—
ko = 0 by grouting, etc., and when the initial compressive stress av is acting on pipe — should be applied in place of — in the fTf' first term of the equation.
2. , H n2/2 \2 + 12r0'2 (n2-l) 14—7-77
\ ro 2 /
This formula;is the one for buckling of a cylinder when the displacement is zero due to restraint at both ends. But Nagashima and Kozuki analyzed based on the following concepts:
3 Pipes between tstiifgiiers are also restrained from their displacement by co^pr.eteand bedrock like the case without stiffeners.
4A pipe’s displacement at both ends, i.e. a stiffener’s portion, is not zero.
*
According to their analysis, critical buckling pressure of the pipe with stiffeners can be obtained by applying the following T instead of actual stiffener’s interval / to the Timoshenko’s formula.
5 With water fully filled in the pipe
6If reacting forces act as illustrated in Figure 1.29-1, circumferential cross jection forces of a ring girder can be given from the following formulae: T=Q(K\ + BKz)
M^QtRKi+XKJ
S=Q(Ki + CK6')
7Centrifugal foce Pe and unbalanced force Pn, which act at bends can be determined from the following formulae: