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DESIGN AND ANALYSIS FOR A MULTISTOREY BUILDING

United Arab Emirates University Faculty of Engineering Department of Civil and Environmental Engineering Graduation Project I. DESIGN AND ANALYSIS FOR A MULTISTOREY BUILDING. Project Advisor: Dr. Usama Ebead. Outline. Project description Summary for GP1 Structural elements Alternatives

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DESIGN AND ANALYSIS FOR A MULTISTOREY BUILDING

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  1. United Arab Emirates University Faculty of Engineering Department of Civil and Environmental Engineering Graduation Project I DESIGN AND ANALYSIS FOR A MULTISTOREY BUILDING Project Advisor:Dr. UsamaEbead

  2. Outline • Project description • Summary for GP1 • Structural elements • Alternatives • Slab Analysis & design • Analysis & design of columns

  3. Outline • Analysis & design of punching • Analysis & design of Stairs • Analysis & design of foundations • Sample of drawings • Cost Estimation

  4. Problem statement • The aim of our graduation project is to analyze and design a multi storey reinforced concrete building.

  5. Project description • Design a six storey building that includes several types of apartments/offices: • Law offices • Consulting firms • Apartment’s accommodation • Shops • Small stores

  6. Loads Vertical loads Lateral loads Wind load or earthquakes load Dead load & Live load

  7. Live Load

  8. Dead load wD = ts .c + F.C (kN/m2) • wD = dead load of the slab • ts  = thickness of slab (m) • c = unit weight of concrete (kN/m3) • F.C = given floor cover (kN/m2)

  9. Alternatives • Slabs: • Flat slab • Solid slab • Hollow block slab • Mesh sizes: • Fine mesh • Medium mesh • Coarse mesh

  10. Best Alternative (Flat slab) • Low cost and easy formwork. • It’s good for opening areas without drop beams.(showing rooms, offices) • Faster in construction.

  11. Fine or small mesh • Very accurate. • Define the area of the column in full in accurate way. • Control the open area in the building.

  12. Prepare AutoCAD file

  13. FINAL DRAWING

  14. Sap2000

  15. Sample calculation • Determine steel reinforced bars

  16. Determine steel reinforced bars • Determine Number of Bars of Steel:

  17. Drawings

  18. Columns • Columns are frequently used to support beams or arches .

  19. Columns • A column is a vertical structural element that transmits, through compression the weight of the structure above to other structural elements below.

  20. Columns • Type of columns: • Tied Columns • Spiral Columns

  21. Columns • Type of columns:

  22. Analysis of column • How we got the Reactions: we define each column in each slab as a set of points using AutoCAD file.

  23. Analysis of column • By using Sap2000 program, we got a data file which is shows the joints label and the reactions value.

  24. Analysis of column • We got information for each point

  25. Analysis of column • Columns reaction for each floor and the resultant :

  26. Columns Sampling

  27. Design of column • STEP 1: Determine initial gross area of concrete (Ag) • STEP 3: Choose practical concrete dimensions & calculate Ag (chosen) • STEP 4: Determine longitudinal area of steel (Ast) • STEP 2: Determine initial concrete dimensions • STEP 5: Determine Ties (spiral) size and spacing • STEP 6: Drawing

  28. Sample Calculation for (C5) • Pu = 1761.8601KN, fy = 420 MPa, =30 MPa, Ф=0.65, α=0.8.

  29. Sample Calculation for (C5)

  30. Sample Calculation for (C5) • Detailing drawings

  31. Punching shear • Punching shear is a type of failure of reinforced concrete slabs subjected to high localized forces.

  32. Check For punching 1. Calculate the punching shear stress in the slab. 2. Calculate the shear stress resistance of the slab Vr. 3. Compare between the p & Vr .

  33. Design pressure • 1. Calculate the punching shear stress in the slab: Where: C1, C2: dimension of the column. d: thickness of the slab-cover.

  34. Design pressure • 2. Calculate the shear stress resistance of the slab Vr. Vr= least of:

  35. Sample of calculation for one column C3: 300x300 mm,using =30 Mpa & d=235 mm, Shear stress Shear stress resistance Vr < p

  36. Summary of results For all column

  37. Summary of results For all column

  38. Summary of results For all column

  39. Summary of results For all column In all columns, the Shear stress resistance is greater than shear stress in the columns. So , the slab is safe from punching shear.

  40. Stairs • Reinforced concrete stairs are essential elements in building to transfer people from one level to another.

  41. Analysis of stairs • Step 1: Determine slope length

  42. Analysis of stairs • For section 1-1 & 3-3:

  43. Analysis of stairs • Step 2: Determine ( h )

  44. Design of stairs • Step 1: Determine the own weight

  45. Design of stairs • Step 2: Determine the ultimate load • Step 3: Determine the ultimate moment :

  46. Design of stairs • Step 4: Determine the reinforcement

  47. Design of stairs • Step 4: Determine the reinforcement • ρmin=0.00336 ≥ ρ=0.00121 ≤ ρmax=0.0191 • As= 5#13 / m

  48. Foundation • Foundations or footings are structural members used to support columns and walls transmit and distribute their loads to the soil.

  49. Types of foundation • Isolated or single footings • Combined footings • Cantilever or strap footings • Rafted or mat foundation • Continuous footings • Wall footings

  50. Columns Sampling

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