multistorey building design by sap and autocad
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This document summarizes the structural analysis and design of a 7-storey commercial building in Bhaktapur, Nepal. The project members modeled the building in SAP 2000 and designed the structural components including slabs, beams, columns, staircases, basement walls, lifts, and raft foundation. The structural design followed codes IS456, IS875, IS1893, and considered seismic and gravity loads. The building has RCC framing with raft foundation. Structural elements were designed for strength and serviceability requirements then detailed.
multistorey building design by sap and autocad
- 1. Structural Analysis And Design of Multi-storeyed Building Project members: Rajesh Dhakal (066/BCE/57) Sandeep Shrestha (066/BCE/70) Santanu Shrestha (066/BCE/73) Shyam Kumar Sinkemana (066/BCE/80) Supervisor: Asst. Prof. Prachand Man Pradhan
- 2. Objectives • Learn the concept of lateral and vertical loading on the building. • Identification of structural arrangement of the plan. • Modeling of the building for the structural analysis. • Detail structural analysis using SAP 2000. • Sectional design of structural components. • Structural detailing of members and the system.
- 3. Major Scope • Seismic coefficient method is used • Code of practices: IS456:2000, IS875:1987(Part 1,2), IS1893:2000, IS13920:1993, SP16,SP34 • The bearing capacity of foundation is assumed to be 140 kN/m2. • The project does not take into account the soil pressure in elements at the basement as well as the possible impact loads due to vehicles
- 4. Salient Features • Name: Bharbhacho Complex • Location: Dhudhpati, Bhaktapur • Building Type: Commercial • System: RCC framed Structure • No. of storeys: 7 • Floor ht: 3.3m • Foundation type: Raft foundation
- 5. Preliminary Design • Design of Slab : as per deflection control Slab Depth Effective depth (d) Total depth (D) Without secondary beam 190 mm 220 mm With secondary beam 120 mm 150 mm
- 6. Design of beam: as per deflection control Beam type Width (b) Total depth (D) Primary Beam 400 mm 550 mm Secondary beam 250 mm 300 mm
- 7. • Design of column – Loaded from slab, wall, beam and self weight of column considered – Factored load calculated – 20% EQ load considered – Equating total load with Puz=0.45fckAc+0.75fyAst – Assuming Pt=3% – Ag calculated and size of column adopted Column Type Dimension (B×D) mm2 Type I 400×400 Type II 400×400 Type III 500×500
- 8. Manual calculation • Dead Load – Slab – Beam – Wall – column • Live load • Centre of mass • Centre of rigidity • Eccentricity
- 9. SAP Analysis
- 10. Design of Structural members • Design of Slab Xm Ym Xs Ys Ast required 112.25 98.04 141.51 132.27 Ast provided 452.36 376.967 376.967 376.967
- 11. Slab Detailing
- 12. Torsional Detail in Slab
- 13. Design of Staircase Staircase Main reinforcement Distribution bar Development length Required Provided Required Provided Required Provided Doglegged 12Φ 559c/c 12Φ 200 c/c 8 Φ@279c/c 8 Φ@270c/c 810 mm 820 mm Openwell 1st flight 12Φ391.65 c/c 12Φ300 c/c 8 Φ@279c/c 8 Φ@270c/c 483 mm 485 mm 2nd flight 12Φ398.26 c/c 12Φ195c/c 8 Φ@279c/c 8 Φ@270c/c 600 mm 700 mm
- 17. Design of Beam Beam Type Support reinforcement Mid reinforcement Top bar Bottom bar Top bar Bottom bar Primary beam (400x550) 5-25 Φ 4-20 Φ 2-20 Φ 2-25 Φ Stair beam (400x 550) 2-20 Φ 2-20 Φ 2-20 Φ 4-20 Φ Secondary beam (250x300) 3-16 Φ 2-16 Φ 2-16 Φ 3-16 Φ
- 18. Beam Detailing
- 19. Contd.
- 20. Design of Column Column Types Reinforcement percent Small (400x400) 8-28 Φ 2.43 % Big (600x600) 12-25 Φ 1.64 % Ramp (500x600) 12-28 Φ 2.46 %
- 21. Column Detailing
- 23. Design of Basement wall Reinforcement pattern Face Reinforcement Vertical Both 16 mm Φ @ 190 mm Horizontal Front 8 mm Φ @160 mm Inner 8 mm Φ @320mm
- 24. Detailing of Basement wall
- 25. Design of Lift Lift Types Vertical Reinforcement Horizontal Reinforcement Required Provided Required Provided Capsule 14 Φ @ 109.36 14 Φ @ 100 12 Φ @ 253.85 12 Φ @ 250 Middle capsule 14 Φ @ 331.14 14 Φ @ 320 12 Φ @ 253.85 12 Φ @ 250 Service 14 Φ @ 367.67 14 Φ @ 350 12 Φ @ 253.85 12 Φ @ 250
- 26. Lift Detailing
- 27. Design of Foundation Shorter span reinforcement Longer span reinforcement 20 mmφ @ 175 mm c/c 20 mmφ @ 200 mm c/c
- 29. THANK YOU