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danfe apartment.pptx
- 1. A PRESENTATION ON Detailed Structural Analysis and Design of Apartment Building At Rabibhawan, Kathmandu OWNER: DESIGNED BY: DANFE DEVELOPERS PVT LTD Er. Bibek Sikarmi PLOT NO: 20,27,28,99,120,121,130 MSc. in Earthquake Engineering WARD-14, RABIBHAWAN, KATHMANDU NEC NO: 11630 ‘A’
- 2. Parameters Building Residential Building Type of Structure RC WALL DUAL SYSTEM Shape Fairly Regular Shaped Dimension of Building (LXB) 20.42 m x 17.20 m (TYPICAL FLOOR) Building Height (T) 48.15 m Height to width ratio of building: 2.80 Length to width ratio of building: 1.19 No. of Storey applied for permission Basement + Ground + 13 FLOORS+ Stair Cover Number of storeys considered in structural design (in Nos.) Same as applied for permission Building Parameters
- 3. Parameters Floor Height Basement Floor 5.2 m. Ground Floor 4.05 m. Typical Floors 3.15 m. Total Building height including basements and stair covers 53.35 m. Building height Considered for Time period calculation 48.15 m. Building Parameters
- 5. STRUCTURAL PARAMETERS: Parameters Concrete Grade M25 for Pile; M30 for Foundation, Slab, Staircase; M40 for Beam, Column, Shearwall Reinforcement Grade Fe 500 TMT Foundation Type Piled Raft Footing Maximum Column Size 600 mm x 1200 mm Reinf. Provided in column 32-32Ø 25736mm2 , 3.57% Main Beam Size 450mm x750mm (TYP.) FOR 7.905m SPAN Slab Thickness 125/150/200 mm Stair Slab Thickness 160 mm
- 6. LOADINGS: Dead loads as per Indian Standard, IS 875 -1987(Part1). S.N Type Value 1 Reinforced Concrete 25 kN/m3 2 Brick Masonry 18.85 kN/m3 3 Screed 20.40 kN/m3 4 Marble 26.7 kN/m3 5 Tile 23.1 kN/m3 6 Plaster 20.4 kN/m3 Dead Loads Dead load of 200 mm thick wall 5.2 kN/m Dead load of 200 mm thick wall with 15 % opening 4.8 kN/m Dead load of 200 thick wall with 35 % opening 3.7 kN/m Dead load of parapet wall (200 mm thick) 2.2 kN/m
- 7. LOADINGS: Live loads as per Indian Standard, IS 875 -1987(Part II). S.N Area type Load Unit 1 Room 2.0 kN/m2 2 Kitchen 2.0 kN/m2 3 Staircase and Passage 3.0 kN/m2 4 Toilet 2.0 kN/m2 5 Terrace (Accessible) 1.5 kN/m2
- 8. EARTHQUAKE LOAD 1) Equivalent Static Method As per NBC 105:2020 Z = Seismic Zoning factor = 0.35 (Table 4-5, Cl. 4.1.2; NBC 105) I = Importance factor = 1.0 (Table 4-6, Cl. 4.1.5; NBC 105) Rμ= Ωu = Ductility Factor Overstrength Factor = 3.5 (Table 5-2, Cl. 5.3.1; NBC 105) = 1.40 (Table 5-2, Cl. 5.4.1; NBC 105) Ch(T) =Spectral Shape factor as per Cl. 4.1.5(NBC 105) Type of soil : Type D, Very Soft Soil
- 9. EARTHQUAKE LOAD Mass Sources As per NBC 105:2020 S.N Load Type Scale Factor 1 Dead Load (all type) 1 2 Live Load 0.3 3 Live Load (STORAGE) 0.6 4 Roof Live Load Nil
- 10. EARTHQUAKE LOAD Seismic Load Seismic Zone factor Z Cl. 4.1.2, Table 4-5 0.35 Importance factor I Cl. 4.1.5, Table 4-6 1.0 Lateral load resisting system Ductile Moment Resisting Frame Ductility Factor/Overstrength Factor Rμ / Ωu Cl. 5.3.1, Table 5-2 3.5/1.40 Height of the building h 48.15 M Time period of the building along X, Tx=1.25*0.05h3/4 Cl. 5.1.2/5.1.3 1.142 sec Time period of the building along Y Ty=1.25*0.05h3/4 Cl. 5.1.2/5.1.3 1.142 sec Soil type Type D (Very Soft Soil) Spectral Shape factor along X Ch(T) Cl. 4.1.5 2.25 Spectral Shape factor along Y (Ch(T) Cl. 4.1.5 2.25 Design Horizontal Seismic Coefficient along X Cl. 6.1.1 0.16071 K=1.321 Design Horizontal Seismic Coefficient along Y Cl. 6.1.1 0.16071 K=1.121
- 11. EARTHQUAKE LOAD
- 12. EARTHQUAKE LOAD 1I) Response Spectrum Method As per NBC 105: 2020 As Per NBC 105 Soil Type: D (Very Soft Soil) Initial Scale Factor : (I*g)/(Rμ *Ωu)*Z= .701 Where, I = 1.0 Rμ = 3.5 ; Ωu =1.4 g = 9.810 Modified Scale Factor : Coeff. Base Shear/RS Base Shear*Initial S.F.
- 13. LOAD COMBINATION As per IS NBC 105:2020 Static Load Combination: 1.2DL + 1.5LL Seismic Load Combination: FOR PARALLEL SYSTEM DL + 0.3LL +EQx / EQy
- 14. 3D-Models
- 15. Section Input
- 16. Section Input
- 17. Section Input Crack Section Analysis (NBC 105:2020)
- 18. Load Input
- 19. Analysis Seismic Weight and Base shears BLOCK A NBC-105:2020 Seismic Wt.(KN) 83918.7454 Direction X Y Seismic Coefficient(ULS) 0.16071 0.16071 Vb (KN) 13486.94 13486.94
- 20. Analysis Drift Check (NBC- 105:2020) Maximum Drift (ULS)= 0.006826 Maximum Drift (SLS)= 0.005575 Permissible Drift (ULS)= 0.00714 Permissible Drift (ULS)=0.006
- 21. Analysis Modal mass participation (NBC 105:2020) 1st 3 modes > 65% 18TH mode > 90%
- 22. Analysis Torsional Irregularity Check (NBC 105:2020)
- 23. Analysis Eccentricity Check (NBC 105: 2020) Eccentricity < 10 % in ALL FLOORS
- 24. Analysis Stiffness Irregularity Check (Soft Story) NO STIFFNESS IRREGULARITIES
- 25. Analysis Beam Deflection Check OK IN DEFLECTION
- 26. Design Sample Frame Design (NBC 105:2020) Column Reqd. Reinf. 25718mm2 (3.57%) Provided Reinf. 25736 mm2 (16-25), 3.57%
- 27. Design Sample Frame Design (NBC 105:2020) Column Summary
- 28. Design Sample Frame Design (NBC 105:2020) Shear Wall
- 29. Design Sample Frame Design Beam Reqd. Reinf. 6892 mm2 Provided Reinf. 7100 mm2, 1.89%
- 30. Design Column Beam Capacity Ratios C/B > 1.2 For all columns
- 31. Design Slab Design Slab=150mm thick Reinforcement : 8 mm dia bars @ 150 mm c/c
- 35. Design Settlement Of Raft Maxm. Settlement= 64.33 mm ; Allowable Settlement = 100 mm
- 36. Design Soil Pressure Diagram Maxm. Soil Pressure On Raft= 257.38 kN/m2 and SBC 100 kN/m2
- 41. Design Reinforcement Design Concrete Grade: M30 Steel Grade: Fe 500 TMT Thickness (mm) Reinforcement Detail Overall (t1) Top bar (Both ways) Bottom bar (Both ways) 1000/1350 25mm Ø @ 180mmc/c 32mm Ø @ 90mmc/c
- 43. • IS 456- 2000 Code of practice for plain and reinforced concrete • IS 875-1987 Code of practice for design loads (other than earthquake) for buildings and structures •NBC 105:2020 Nepal National Building Code: Seismic Design of Buildings in Nepal • SP 34 •SP 16 STANDARDS
- 44. THANK YOU