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General Notes and
Solved Examples

Reinforced Concrete IV
Second Semester
Structural Engineering Department
Faculty of Engineering
Tanta University

1. Fundamentals
(1)
(a) Statical system for each tank
Fig. 1
For H = 1.5 m
The walls of the tank can be treated as cantilever , i.e., the total load acting in each
wall will be transmitted in vertical direction
For H = 4 m
Top horizontal beam should be used. In this case, the wall will be considered as two
way slab.
Horizontal strip at the sec.
of max. horizontal load
H
Vertical Sec.
Statical system in
conjunction with
the loads
Vertical strip
Instructor: eng just for help Subject: Water Tanks
2000-2001 Solved Examples
Fig. 2
Fig. 3
* If the tie is removed
Fig. 4
Statical system for
vl strip (Box. Sec)
Structural system
for vl. strip
Tie
Statical system for vertical strip
H=2m
The walls of the tank can be considered as cantilever walls
H
Statical system for vl. Strip
Instructor: eng just for help Subject: Water Tanks
2000-2001 Solved Examples
* H = 4 m
Top horizontal beam should be used.
Fig. 5
For large diameter tank, the part of floor with the length (L) with the wall adjacent to
it can be assumed as a retaining wall connecting to the central part.
* If the tank has sliding base, the wall and floor will be treated separately.
Fig. 6
b. Acting loads & case of loading
• Fig. 1 to Fig. 4 are elevated tanks
Acting loads are: * own weight of concrete elements
* water load → vl. Load on floor
→ lateral load on walls
* External lateral load → wind pressure
→ Earthquake Excitation
- case of loading
1- Case of water load (No external lateral load)
2- Empty tank and consider lateral load.

 General Notes and Solved Examples
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