stucture design of various watre tank
TRANSCRIPT
![Page 1: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/1.jpg)
SNPIT & RC,SNPIT & RC,UMRAKHUMRAKH
Guided By:- Proff. Keyur P. Shah
Subject:- Structural Analysis 2
Topic:- Slope Deflection
Nagma ModiMrunali MehtaPrakruti PathakHirvi VimawalaSagar Padhiyar
130490106065130490106064130490106094130490106121140493106015
Prepared by…
Subject:- Design of Reinforced Concrete Structure
Topic:- Design of Water Tank
![Page 2: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/2.jpg)
WATER TANKS WATER TANKS
2
![Page 3: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/3.jpg)
Learning out ComeLearning out Come
REVIEW TYPES OF TANKS DESIGN OF RECTANGULAR WATER
TANK RESTING ON GROUND WITH RIGID BASE
3
![Page 4: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/4.jpg)
INTRODUCTION
4
• Storage tanks are built for storing water, liquid petroleum, petroleum products and similar liquids
• Designed as crack free structures to eliminate any leakage • Permeability of concrete is directly proportional to water
cement ratio. • Cement content ranging from 330 Kg/m3 to 530 Kg/m3 is
recommended in order to keep shrinkage low.
![Page 5: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/5.jpg)
INTRODUCTION
5
• Use of high strength deformed bars of grade Fe415 are recommended for the construction of liquid retaining structures
• Correct placing of reinforcement, use of small sized and use of deformed bars lead to a diffused distribution of cracks
• A crack width of 0.1mm has been accepted as permissible value in liquid retaining structures
![Page 6: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/6.jpg)
INTRODUCTION
6
• Code of Practice for the storage of Liquids- IS3370 (Part I to IV)
• Fractured strength of concrete is computed using the formula given in clause 6.2.2 of IS 456 -2000 ie., fcr=0.7fck
MPa. • Allowable stresses in reinforcing steel as per IS 3370 are st= 115 MPa for Mild steel (Fe250) and
st= 150 MPa for HYSD bars(Fe415)
![Page 7: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/7.jpg)
INTRODUCTION
7
• In order to minimize cracking due to shrinkage and temperature, minimum reinforcement is recommended as:
• For thickness 100 mm = 0.3 %• For thickness 450 mm = 0.2%• For thickness between 100 mm to 450 mm = varies
linearly from 0.3% to 0.2%• For concrete thickness 225 mm, two layers of
reinforcement be placed, one near water face and other away from water face.
![Page 8: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/8.jpg)
INTRODUCTION
8
• Cover to reinforcement is greater of i) 25 mm, ii) Diameter of main bar
• For tension on outer face:st=140 MPa for Mild steel and st=230 MPa for HYSD bars
• For concrete thickness 225 mm, two layers of reinforcement be placed, one near water face and other away from water face.
![Page 9: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/9.jpg)
TYPES OF WATER TANK TYPES OF WATER TANK
9
![Page 10: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/10.jpg)
10
WATER TANK
BASED ON PLACEMENT OF TANK
BASED ON SHAPE OF TANK
1. RESTING ON GROUND2. UNDER GROUND3. ELEVATED
1. CIRCULAR2. RECTANGULAR3. SPHERICAL4. INTZ5. CONICAL BOTTOM
![Page 11: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/11.jpg)
11
RESTING ON GROUND
![Page 12: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/12.jpg)
12
UNDERGROUND
![Page 13: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/13.jpg)
13
ELEVATED
![Page 14: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/14.jpg)
14
CIRCULAR
![Page 15: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/15.jpg)
15
RECTANGULAR
![Page 16: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/16.jpg)
16
SPHERICAL
![Page 17: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/17.jpg)
17
INTZ
![Page 18: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/18.jpg)
18
CONICAL BOTTOM
![Page 19: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/19.jpg)
RECTANGULAR WATER RECTANGULAR WATER TANKS RESTING ON GROUNDTANKS RESTING ON GROUND
19
![Page 20: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/20.jpg)
IntroductionIntroduction
• Rectangular tanks are used when the storage capacity is small • Rectangular tanks should be preferably square in plan from
point of view of economy. • It is also desirable that longer side should not be greater than
twice the smaller side.
20
![Page 21: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/21.jpg)
IntroductionIntroduction
• Moments are caused in two directions of the wall ie., both in horizontal as well as in vertical direction
• Exact analysis is difficult and are designed by approximate methods.
• When the length of the wall is more in comparison to its height, the moments will be mainly in the vertical direction, ie., the panel bends as vertical cantilever
21
![Page 22: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/22.jpg)
IntroductionIntroduction
• When the height is large in comparison to its length, the moments will be in the horizontal direction and panel bends as a thin slab supported on edges.
• For intermediate condition bending takes place both in horizontal and vertical direction.
• In addition to the moments, the walls are also subjected to direct pull exerted by water pressure on some portion of walls.
22
![Page 23: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/23.jpg)
IntroductionIntroduction
• The walls are designed both for direct tension and bending moment.
23
![Page 24: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/24.jpg)
IntroductionIntroduction
24
![Page 25: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/25.jpg)
IntroductionIntroduction
• IS3370 (Part-IV) gives tables for moments and shear forces in walls for certain edge condition. Table 3 of IS3370 provides coefficient for max Bending moments in horizontal and vertical direction.
25
![Page 26: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/26.jpg)
IntroductionIntroduction
• Horizontal steel is provided for net bending moment and direct tensile force
• Ast=Ast1+Ast2;
• M’=Maximum horizontal bending moment – T x; • x= d-D/2
26
jd'MA
st1st
Ast2=T/st
x
D/2d
![Page 27: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/27.jpg)
DESIGN PROBLEM DESIGN PROBLEM
27
![Page 28: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/28.jpg)
Example:Example:Design a rectangular water tank 5m x 4m with depth of storage 3m, resting on ground and whose walls are rigidly joined at vertical and horizontal edges. Assume M20 concrete and Fe415 grade steel. Sketch the details of reinforcement in the tank
28
![Page 29: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/29.jpg)
Step1: Analysis for moment and tensile forceStep1: Analysis for moment and tensile force
29
E
B
A
F
D
C
Free
a=H=3m
b=4m
L=5m
Fixed
![Page 30: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/30.jpg)
Step1: Analysis for moment and tensile forceStep1: Analysis for moment and tensile force
30
i) Long wall:
![Page 31: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/31.jpg)
Step2: Design ConstantsStep2: Design Constants
31
![Page 32: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/32.jpg)
Step3: Design for Vertical momentStep3: Design for Vertical moment
32
![Page 33: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/33.jpg)
Step3: Design for Vertical momentStep3: Design for Vertical moment
33
Spacing of 12 mm diameter bar = c/mmc 2.10154.1117
1000x113 (Max spacing 3d=411mm)
Provide #12 @ 100 mm c/c Distribution steel Minimum area of steel is 0.24% of concrete area Ast=(0.24/100) x1000 x 170 = 408 mm2
Spacing of 8 mm diameter bar = c/mmc19.123408
1000x24.50
Provide #8 @ 120 c/c as distribution steel. Provide #8 @ 120 c/c as vertical and horizontal distribution on the outer face.
![Page 34: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/34.jpg)
Step4: Design for Horizontal momentStep4: Design for Horizontal moment
Horizontal moments at the corner in long and short wall produce unbalanced moment at the joint. This unbalanced moment has to be distributed to get balanced moment using moment distribution method.
34
![Page 35: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/35.jpg)
Step4: Design for Horizontal momentStep4: Design for Horizontal moment
35
![Page 36: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/36.jpg)
Step4: Design for Horizontal momentStep4: Design for Horizontal moment
36
![Page 37: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/37.jpg)
Step4: Design for Horizontal momentStep4: Design for Horizontal moment
37
![Page 38: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/38.jpg)
Step4: Design for Horizontal momentStep4: Design for Horizontal moment
38
![Page 39: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/39.jpg)
Step5: Base SlabStep5: Base Slab
39
• The slab is resting on firm ground. Hence nominal thickness and reinforcement is provided. The thickness of slab is assumed to be 200 mm and 0.24% reinforcement is provided in the form of #8 @ 200 c/c. at top and bottom
• A haunch of 150 x 150 x 150 mm size is provided at all corners
![Page 40: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/40.jpg)
DetailingDetailing
40
![Page 41: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/41.jpg)
DetailingDetailing
41
![Page 42: Stucture Design of various Watre tank](https://reader035.vdocuments.us/reader035/viewer/2022062822/58847adb1a28ab5e248b6ced/html5/thumbnails/42.jpg)
42