design data
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BELLADONNA Project
DESIGN CODE: A.C.I. 318-08 U.B.C. 97
MATERIAL PROPERTIES Concrete = 4,000 psi
o Specified Concrete Compressive Strength at 28-days, fc’ = 27.58mPa o Concrete Weight per Unit Volume = 23.5631 kN/m3
Reinforcing Steel Bars (below 16ᴓ) = Deformed Steel Bars (A.S.T.M. A615 Grade 40)o Minimum Yield Stress, fy = 275.80 mPao Weight per Unit Volume = 76.9729 kN/m3
Reinforcing Steel Bars (16ᴓ and above) = Deformed Steel Bars (A.S.T.M. A615 Grade 60)o Minimum Yield Stress, fy = 413.70 mPao Weight per Unit Volume = 76.9729 kN/m3
Allowable Soil Bearing Capacity, q ALLOW =
Structural Steel = ASTM 36o Modulus of Elasticity, E = 200,000 mPao Yield Strength, Fy = 250 mPao Tensile Strength, Fu = 400 mPao Endurance Strength = 207 mPao Density, ρ = 7780 kg/m3
o Poisson’s ratio, μ = 0.30o Shear Modulus, G = 77,200 mPao Coefficient of Thermal Expansion = 11.7 x 10-6 / ◦C
DESIGN DEAD LOADS Interior Partitions
o 100mm thick Concrete Hollow Block, plastered both faces = 2.11 kPa Floor Tile Finish
o Ceramic or Quarry Tiles(20mm) on 13mm mortar bed = 0.77 kPa Utilities
o HVAC, Electrical Lighting and Fixtures, Plumbing Fixtures = 0.24 kPa Roof Level Ceiling
o Ceiling System (Joists And Furring included) = 0.38 kPa Roof Cover
o Galvanized Iron Roofing sheet = 0.12 kPa
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BELLADONNA Project
Steel Framing System at Roof Decko Steel Truss (Light Steel Work) = 1.00 kPa
DESIGN LIVE LOADS Category: Residential Occupancy
Floor Uniform Load: 2.0 kPaRoof Live Load: 0.60 kPa
EARTHQUAKE ANALYSIS AND DESIGNN.S.C.P. 2010, 6 th Edition Section 208 EARTHQUAKE LOADS
NSCP 103-1 (Occupancy Category) Standard Occupancy Structures
NSCP Table 208-1 (Seismic Importance Factor) I = 1.0
NSCP Figure 208-4 (Referenced Seismic Zone Map of the Philippines) Zone 4 (Quezon City)
NSCP Table 208-3 (Seismic Zone Factor) Z = 0.40
NSCP Table 208-6 (Seismic Source Type) Type A
o M ≥ 7.0
NSCP Table 208-4 (Near Source Factor) Na = 1.00 (distance to known seismic source ≤ 15 km)
NSCP Table 208-5 (Near Source Factor) Nv = 1.00
NSCP 208.4.3 (Site Geology and Soil Characteristics) Type SD
o When soil properties are not known in sufficient detail to determine the soil profile type, Type SD shall be used.
NSCP Table 208-7 (Seismic Coefficient) Ca = 0.44Na
NSCP Table 208-8 (Seismic Coefficient) Cv = 0.64Nv
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BELLADONNA Project
NSCP Table 208-11 (Structural System) R = 4.50 (Bearing Wall/Shear Wall System) R = 8.50 (Concrete Special Moment Resisting Frames)
NSCP 208.5.2.2 (Structure Period) Method A T = Ct (hn)3/4
Ct = 0.085 (for steel moment resisting frames) = 0.0731(for reinforced concrete moment resisting frames)
= 0.050 (for all other buildings)hn = Height of structure
LOAD COMBINATIONSN.S.C.P. 2010, 6 th Edition Provision 203.5 (Special Seismic Load Combinations)
U = 1.2D + f1L +1.0EM
U = 0.9D ± 1.0EM
Where:f1 = 1.00 for floors in public assembly, for live loads in excess of 4.8 kPa, and for garage live load = 0.50 for other live loadsEM = estimated maximum earthquake force that can be developed in the structure.D = dead loadL = live load
References: National Structural Code of the Philippines. (N.S.C.P.)
Buildings, Towers, and other Vertical Structures. 2010. 6TH Edition.
Association Of Structural Engineers of the Philippines (A.S.E.P.) Handbook
American Institute of Steel Construction. (A.I.S.C.) Specifications for Structural Steel Buildings.(ANSI/AISC 360-05)
Building Code Requirements for Structural Concrete (ACI 318-02) and Commentary(ACI318R-02), American Concrete Institute
Preliminary Sizing of Structural Elements
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BELLADONNA Project
1. Concrete SlabApproximate h = (Slab panel perimeter)/ 180Approximate h = [2(5.20m) + 2(5.50m)]/180Approximate h = 0.11889m
Weight of Slab = 2.95 kPa
2. Concrete Beam
Element Wt. (kPa)
Concrete Slab 2.95Floor Tiles 0.77Fixtures 0.24Total 3.96