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1
Structural Analysis and Design of a Composite Steel/RC
Multi-Storey Building
Final Presentation
United Arab Emirates University
College of Engineering
Department of Civil and Environmental Engineering
Graduation Project
Fall 2008
Wednesday 31st of December, 2008
Student Name ID Number
Saqer Ahmed Masood Al Braiki 200304530
Mohammed Monir Makin Ajan Alhadid
200440273
Hasan Amer Hasan Al Timimi 200440121
Sultan Omair Ali Al Sheryani 200632648
Examination Committee
Dr. Mawahib Sulieman
Dr. Ahmad Bushlaibi
Dr. Khaled El-Sawy
Advisor: Dr. Amr
Sweedan
2
Outline
DesignShear wall
Design of Beams
Slab Design
Design of Columns
Connection
Project Description
3
Project Description … 3D Perspective View
Building Side (C)
Building Side (CC)
Core
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(CC) Side:
•Consist of 28 Floors.
•Arch Concaving in Other Direction.
•Floor Height: 3.6 m.
•Dimensions: (31 m x 10 m).
•Number of Apartments: 2
(C) Side:
•Consist of 30 Floors.
•Arch Concaving in One Direction.
•Floor Height: 3.6 m.
•Dimensions:(34 m x10 m).
•Number of Apartments: 3
Project Description… overview
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Project Description … Overview
Core:
•Contains the Elevators, Staircases, Shear walls and Ducts.
•Not Concaved.
• Dimensions: (18 m x 6 m).
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Structural System … Plan View
7
Outline
DesignShear wall
Design of Beams
Slab Design
Design of Columns
Connection
Project Description
8
Flat Slab
Slab and Staircase Design
Flat Slab Concept
Design procedure
Staircase
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Flat Slab…… General concept
Flat Slab:
•Flat slab is a slab directly
supported on columns
•Advantages: No interior beams.
•Thickness: 30cm.
•Slab to be designed at floor 15
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Flat Slab …..Design procedure
Design flat slab
Hand calculation
Sap2000 Software
•Calculating minimum steel percentage
•Find the value of (Rn)
•Find the nominal moment
Equations
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Design flat slab……Check Punching
•Determine the ultimate shear acting on the slab. (Vu)
•Determine the column resistance (Vc)
The outer perimeter from column face
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Flat Slab …..Design procedure
Design flat slab
Hand calculation
Sap2000 Software
Y-direction (bottom)
Mu (kN-m) 400
Rn 6.096631611
r 0.014521557
rmax 0.0258
rmin 0.0036
As (mm2) 3921
Extra RC. 5f32
Put the nominal moment in the software as the main mesh
Put extra reinforcement on the areas which exceeds the nominal moment value
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Design flat slab……Final Detailing
Bottom Detailing Top Detailing
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Staircase…… Technical Terms
•Going (G): The horizontal distance of the upper surface of a step.•Rise (R): The vertical distance between horizontal of two consecutive steps.•Waist (h): the least thickness of the stairs slab.•Landing: the horizontal platform which is usually provided at the beginning and the end of series of steps.•Flight: comprised of a number of steps provided between two consecutive landings
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Staircase……. Design summary procedure
Find the depth of steel reinforcement (d)
Find the steel percentage ( )r
Check r
Find As, As (min) and spacing
Check shear
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Outline
DesignShear wallDesign of
Beams
Slab Design
Design of Columns
Connection
Project Description
Shear Wall
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Design Shear wall
Shear wall Concept
Design procedure
Result
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Shear Wall…… Concept
•Shear wall refers to a structural element that is used to resist lateral wind and earthquake loads.
•For tall buildings it is essential to provide adequate stiffness to resist the lateral loads caused by wind and earthquake.
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Shear Wall…… Design procedure
•Determine the minimum thickness (tw)
•Determine the maximum spacing between the vertical and horizontal reinforcement, (S1,S2)
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Shear Wall…… Design procedure
Design Stage
Determine the axial load capacity
Determine the shear strength
Determine the moment strength
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Shear Wall…… Design procedure
Gross cross section area of
the wall
K: Effective length factor
tw: Thickness of the wall
Ic: Clear vertical distance
between lateral support
Concrete compressive strength
= 0.65FPnw: Nominal
axial strength
• Determine the axial load capacity (Pnw)
22
Shear Wall…… Design procedure
Area of the horizontal shear reinforcement Spacing between
horizontal shear reinforcement
0.8 lw
• Determine the shear strength (Vnw)
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Shear Wall…… Design procedure
Yield strength
length of the wall
Ultimate axial load on the
wall Total vertical
steel reinforcement
length of the wall length of the wall Ultimate axial load on the wall
Determine the moment strength(Mnw)
24
Shear Wall…… Result
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