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Design and drawing of RC Structures CV61

2. . WATER TANKS . 3. . Learning out Come. REVIEW TYPES OF TANKSDESIGN OF RECTANGULAR WATER TANK RESTING ON GROUND WITH RIGID BASE. 4. INTRODUCTION. 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..

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Design and drawing of RC Structures CV61

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    1. 1 Design and drawing of RC Structures CV61

    2. 2 WATER TANKS

    3. 3 Learning out Come REVIEW TYPES OF TANKS DESIGN OF RECTANGULAR WATER TANK RESTING ON GROUND WITH RIGID BASE

    4. 4 INTRODUCTION

    5. 5 INTRODUCTION

    6. 6 INTRODUCTION

    7. 7 INTRODUCTION

    8. 8 INTRODUCTION

    9. 9 TYPES OF WATER TANK

    10. 10

    11. 11

    12. 12

    13. 13

    14. 14

    15. 15

    16. 16

    17. 17

    18. 18

    19. 19 RECTANGULAR WATER TANKS RESTING ON GROUND

    20. 20 Introduction 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.

    21. 21 Introduction 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

    22. 22 Introduction 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.

    23. 23 Introduction The walls are designed both for direct tension and bending moment.

    24. 24 Introduction

    25. 25 Introduction 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.

    26. 26 Introduction 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

    27. 27 DESIGN PROBLEM

    28. 28 Introduction 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

    29. 29 Step1: Analysis for moment and tensile force

    30. 30 Step1: Analysis for moment and tensile force

    31. 31 Step2: Design Constants

    32. 32 Step3: Design for Vertical moment

    33. 33 Step3: Design for Vertical moment

    34. 34 Step4: 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.

    35. 35 Step4: Design for Horizontal moment

    36. 36 Step4: Design for Horizontal moment

    37. 37 Step4: Design for Horizontal moment

    38. 38 Step4: Design for Horizontal moment

    39. 39 Step5: Base Slab

    40. 40 Detailing

    41. 41 Detailing

    42. 42

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