multistorey building design by sap and autocad
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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
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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.
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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
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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
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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
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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
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• 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 adoptedColumn Type Dimension (B×D) mm2
Type I 400×400Type II 400×400Type III 500×500
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Manual calculation
• Dead Load– Slab– Beam– Wall– column
• Live load• Centre of mass• Centre of rigidity• Eccentricity
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SAP Analysis
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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
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Slab Detailing
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Torsional Detail in Slab
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Design of Staircase
StaircaseMain 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
Openwell1st flight
12Φ391.65c/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
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Staircase Detailing
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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
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Beam Detailing
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Contd.
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Design of ColumnColumn Types Reinforcement percent
Small (400x400) 8-28 Φ 2.43 %
Big (600x600) 12-25 Φ 1.64 %
Ramp (500x600) 12-28 Φ 2.46 %
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Column Detailing
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Design of Basement wall
Reinforcement pattern Face ReinforcementVertical Both 16 mm Φ @ 190 mm
HorizontalFront 8 mm Φ @160 mmInner 8 mm Φ @320mm
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Detailing of Basement wall
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Design of Lift
Lift TypesVertical 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
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Lift Detailing
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Design of FoundationShorter span reinforcement Longer span reinforcement
20 mmφ @ 175 mm c/c 20 mmφ @ 200 mm c/c
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Raft Footing Detailing
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THANK YOU