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

4

(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

5

Project Description … Overview

Core:

•Contains the Elevators, Staircases, Shear walls and Ducts.

•Not Concaved.

• Dimensions: (18 m x 6 m).

6

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

9

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

10

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

11

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

12

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

13

Design flat slab……Final Detailing

Bottom Detailing Top Detailing

14

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

15

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

16

Outline

DesignShear wallDesign of

Beams

Slab Design

Design of Columns

Connection

Project Description

Shear Wall

17

Design Shear wall

Shear wall Concept

Design procedure

Result

18

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.

19

Shear Wall…… Design procedure

•Determine the minimum thickness (tw)

•Determine the maximum spacing between the vertical and horizontal reinforcement, (S1,S2)

20

Shear Wall…… Design procedure

Design Stage

Determine the axial load capacity

Determine the shear strength

Determine the moment strength

21

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)

23

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