Structural and Geotechnical Design of a 41 Storey High-rise Building in Alaziziah
ASSE 4311: LEARNING OUTCOME ASSESSMENT III/CIV
FINAL PRESENTATION
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Names:
Yousuf Alghazzawi 201500224; Muhammad Shalabi 201203211; Ahmed Saber 201200711
Advisors:
Engr. Danish Ahmad, Dr. Tahar Ayadat
Coordinator:
Dr. Andi Asiz
Outline
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Section Topic
1 Background & Project Objectives
2 Floor Layouts & ETAB Models
3 Calculations & Design
4 Geotechnical & Foundation
5 Constraints
6 Cost Estimation
7 Conclusion & References
Section 1
Background & Project Objectives
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Background v 41 story high rise building, mainly for residential purposes.
v Total height 164m and contains two basements.
v Location: Alaziziyah
v Podium: 8 storys, 27m height.
v Townhouse: 4storys, 15m height.
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Objectivesv To perform the structural design of a high rise building (2
variants will be considered reinforced concrete and steel).
v Compare the structural performance of the two buildings
under loads such as: seismic and wind.
v Design of a foundation system for the structures.
v Compare the cost effectiveness for the structures.
v Note : ACI, AISC and SBC, standards will be used.
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Section 2
Floor Layouts & ETAB Models
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Reinforced Concrete Tower
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Area:806𝑚"
No.ofcolumns:16No.ofbeams:40
Steel Tower
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Area:806𝑚"
No.ofcolumns:16No.ofbeams:40
Podium
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Area:851𝑚"
No.ofcolumns:18
Townhouse
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Area:966𝑚"
No.ofcolumns:28
3D ModelReinforced Concrete Tower
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Non-Deformed Shape Deformed Shape
Maxdeflection:0.0099m
3D ModelSteel Tower
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Non-Deformed Shape
Deformed Shape
Maxdeflection:0.023m
DriftMax Drift (DL + wind) combination:
Steel tower = 744.88mm < 3,280mm allowableConcrete Tower = 706.29mm < 3,280mm allowable
744.9709.93
78.4 66.8 66
706.29
623.18
75.3 77.950.36
DL+windx DL+windy DL+Eqx DL+Eqy Ultimate
Drift (mm)Steel Concrete
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Note that the allowable drift is 2% of the total height as per ACI code.
3D Model Podium
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Non-Deformed Shape
Deformed Shape
Maxdeflection:0.0048m
3D ModelTownhouse
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Non-Deformed Shape
Deformed ShapeMaxdeflection:
0.004m
Section 3
Calculations & Design
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Calculations
Floor Level Purpose LiveloadKN/𝒎𝟐
Basement B2-B1 Parkinglot 2
Groundfloor
G Lobby,restaurant&shops 6
Group1 1-5 Office 2.5
Group2 6-35 Apartments 5
Group3 36 Fitnesscenter&IndoorPool&Spa 4
Group4 37-40 Penthouse 5
Group5 41 Utilitiesroom 10
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Tower Live Load Table
Calculations
DeadLoad W(KN/m3) Thickness(mm) W(KN/m2)
Partitions - - 0.40
Sandfill 17 500 0.85
CeramicTileon25mmmotarbed - - 1.10
Concreteslab - 200 4.72
Total - - 7.07
DeadLoadofswimmingpool(concrete) 23.6 1500 9.20
DeadLoadofswimmingpool(water) 9.8 1400 3.11
Totalforswimmingpoolstorey - - 18.98
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Tower Dead Load Table
Calculations
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DeadLoad W(KN/m3)Thickness(mm)
W(KN/m2)
Partitions - - 0.40
Sandfill 17.00 500 0.85CeramicTileon25mmmotar
bed- - 1.10
Concreteslab - 500 11.80
Total - 14.15
Podium & Townhouse Dead Load Table
Design
Floor ColumnDimension(m)
ShearwallThickness(m)
BeamDimension(m)
B2– 9 1.5x1.5 0.35 0.85x0.65
10– 23 1.3x1.3
24– 36 1.0x1.0
37– 41 0.7x0.7
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RC Tower
Column Reinforcement
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Beam Reinforcement
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Slab Reinforcement
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Shear Wall Reinforcement
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Design
Floor ColumnDimension ShearwallThickness(m)
Beamdimension
Girderdimension
B2– 14 W40x420 0.35 W21x68 W24x131
15– 24 W14x730
25– 36 W14x426
37– 41 W14x145
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Steel Tower
Steel Connections
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Beam-Column Moment Connection
Bolt Diameter = 0.02223 mHole Diameter = 0.02381 mNumber of Bolts = 6
Steel Connections
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Beam-Beam Moment Connection
Bolt Diameter = 0.02223 mHole Diameter = 0.02381 mNumber of Bolts = 5
Design
Floor Column(m)
Shearwall1thickness(m)
Shearwall2thickness(m)
G– 2 1.2x1.2 0.18 0.153– 5 1.0x1.06– 8 0.7x0.7
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Floor Column(m)G– 1 1.0x1.02– 4 0.7x0.7
RC Podium
RC Townhouse
Slab Reinforcement
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Shear Wall Reinforcement
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Shear wall 1 Shear wall 2
Column Reinforcement
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Section 4
Geotechnical & Foundation
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Soil Characteristics
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Water table
Chemical Analysis of SoilSampleNumber Depth(m) Chlorides% Sulfates%
1 1.00 0.318 0.391
2 1.00 0.321 0.400
3 3.00 0.088 0.375
Average / 0.24 0.38
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Ø 0.24 % > 0.05 % (maximum allowable)
Ø 0.2 % < 0.38 % < 2 % (Therefore sulfate attack hazard is severe).
Foundation
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Hard Rock Piles(Driven)
Mat Foundation
Surface
Basement
Tower Foundation Strips
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Tower Mat Thickness
Concrete 4.4 m
Steel 4.2 m
Podium Foundation Strips
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Thickness of mat = 3.5 m
Tower Pile Design
PileDiameter
(m)
L(m)
B(m)
Spacing(m)#10D
Noofpilesincolumn
Noofpilesin
Row
Totalnoofpiles
QiPile(KPA)
Qg(KPA)
Eff Takeeff
Qg *eff(KPA)
0.3 32.5
27.5
3 11 9 99 152 15094.44
1.17 1 15094
0.4 32.5
27.5
4 8 7 56 189.4 10579.77
1.51 1 10580
0.5 32.5
27.5
5 7 6 36 226.7 8104.525
1.82 1 8105
0.6 32.5
27.5
6 5 5 25 263.6 6544.236
2.10 1 6544
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Podium Pile Design Pile
Diameter(m)
L(m)
B(m)
spacing#10D
NoofpilesinRow
NoofpilesinColumn
Totalnoofpiles
QiPile(KPA)
Qg(KPA)
Eff Qall=Qg *eff(KPA)
0.3 47.1
19.6 3 16 7 103 197 20206.95
1.27 20207
0.4 47.1
19.6 4 12 5 58 249 14366.68
1.64 14367
0.5 47.1
19.6 5 9 4 37 301 11114.85
1.99 11115
0.6 47.1
19.6 6 8 3 26 353.7 9070.047
2.31 9070
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Concrete Tower Mat Reinforcement
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Steel Tower Mat Reinforcement
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Podium Mat Reinforcement
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Section 5
Constraints
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Constraints Solution
Structural§ Deflectionlimit anddrift.
§ LoadCombinations.
Thestructures aredesignedtowithstandallpossibleloadcombinations.Thedeflectionanddriftlimitsarewithintherequiredrange.
Geotechnical
§ Soiltype:claywithlowplasticity(problematicsoil). § Installation ofdrivenpilestosupporttheraftfoundation.
Watertableissuperficial(1mbelowsurface). § Dewatering.
§ Applying apermanentdrainagesystem.
Material
§ Sulfates0.2%<0.38%<2.0%
§ Chlorides0.24% >0.05%
§ TypeVSulfateresistancePortlandCementwillbeused.
§ Coatingofthefoundationandpiles.
§ Applingamembranearoundtheconcrete.
Environmental
§ ContaminatedSoil. Transportedinspecialcontainersto alandfill.
§ ContaminatedWater. Transported byspecialtruckstoadesignateddisposalarea.
Cost To solvetheconstraintsmentionedabovethecostwillbeaffected.
-
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Section 6
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Cost Estimation
Limitations • Our cost estimate includes only cost of materials.
• Cost of construction, labor, machines, transportation, utilities, overhead fees, etc. are excluded.
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MethodMethod:
• Parametric Estimation.
• Recognizing the unit cost and relating it to the number of units needed for the project.
• Unit prices were provided by the construction company “MASCO”.
• Unit prices are the following:
• 209 SR per m³ of concrete type v (35MPA).
•2,300 SR per ton of structural steel.
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Cost of MaterialsConcrete:
Ø Calculate the total volume of concrete needed for:
a) Columns.
b) Beams.
c) Shear wall.
d) Slab.
e) Foundation.
Ø Calculate the weight of reinforcement.
Ø Find the total cost of finishing.
ØTotal Cost of Concrete Tower = cost of finishing + cost of reinforcement + cost of concrete
ØTotal Cost of Concrete Tower = 5,917,714 + 7,177,035 + 4,658,392 = 17.7 Million SR
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Cost of Materials Steel:Ø Find:
a) Weight of columns
b) Weight of Beams and Girders.
c) Weight of Reinforcement.
Ø Find the total volume of:
• Slabs and shear wall.
Ø Find the cost of finishing.
Ø Total Cost = Cost of Finishing + Cost of Concrete + Cost of Steel
ØTotal Cost = 8,091,737 + 2,560,323 + 13,623,151 = 24.3 Million SR
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Section 7
Conclusion & References
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Conclusion• Both structures fulfilled all design requirements.
• Both structures passed all load combination tests.
• Since the concrete structure is heavier the mat foundation is thicker & requires a larger cross-sectional area of reinforcement.
•The concrete structure cost 5.5 Million SR less than the steel structure.
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References §American Concrete Institute (ACI 318-11 Code).
§American Institute of Steel Construction (AISC 2011)
§Saudi Building Code (SBC 301) (SBC 302)
§International Building Code (2009).
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References§Das, B. M. (2014). Principles of geotechnical engineering. Boston:
§Das, B. M. (2004). Principles of foundation engineering. Pacific Grove, CA.
§McCormac, J. C., & Csernak, S. F. (2012). Structural steel design. Boston:
Pearson.
§Amana Eastern Province, soil profile in Alaziziyah.
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References§Lecture notes for Reinforced Concrete Design & Analysis, Engr. Danish Ahmed
(2017).
§Lecture notes for Steel Design, Dr Andi Asiz (2017).
§Lecture notes for Geotechnical engineering & Analysis, Dr. Tahar Ayadat (2017)
§Lecture notes for Materials in Civil Engineering, Dr. Tahar Ayadat (2017)
§ MASCO, Material Cost (2018)
§Lecture notes for cost estimation, Dr. Alaa Salman (2018)
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Thank You
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