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Water Tank Design

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Water Tank Design
DESIGN OF REINFORCED CONCRETE CULVERT

Analysis and Design

I. Analysis Assumption

The culvert shall be designed and analyzed by the Strength Design Method (Load Factor Design).

Frame The box culvert shall be analyzed, as a rigid frame with all corner connections considered rigid.

Sidesway Sidesway is not considered in analysis.

II. Loading For Box Culvert

a. Factored loads for ultimate design capacity. b. Unfactored loads for serviceability checks.

III. Materials

a. Culvert concrete : fc’ = 20.7MPA (3000psi) b. Reinforcing steel : fy = 275MPA (Grade 40) c. Soil Properties: ka = 0.33(Active coef. of friction) for Ø=30 deg. Internal angle of friction of soil.

IV. Dead Loads and Earth Pressures

a. Unit weight of reinforced concrete: wc = 23.6KN/m3(150pcf) b. Unit weight of soil: ws = 23.6KN/m3 (150pcf)

V. Live Loads

a. Live Load for driveways: wL = 12 kpa (surcharge) (NSCP)

VI. Lateral Loads

a. Equivalent Fluid Pressure

CULVERT SECTION
[pic]
LOADS ( CONSIDERING 1M STRIP ALONG CULVERT)
[pic]

Ru = Soil pressure reaction WP = Uniform weight of pavement WPE = Equivalent fluid pressure due to soil WLP = Equivalent fluid pressure due to pavement weight WS = Uniform weight of soil above culvert WC = Uniform weight of culvert

[pic]

WLS = Uniform weight of live load WLL = Equivalent fluid pressure due to live load(surcharge)

Structural Analysis

|Structure Type |SPACE FRAME |

|Number of Nodes |4 |Highest Node |4 |
|Number of Members |4 |Highest Members |4 |

|Number of Basic Load Cases |2 |
|Number of Combination Load Cases |1 |

LOAD CASES
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