Design of Concrete Buildings and
Foundation
ENB 471
By Ario Y. Darestani
Agenda
Introduction
Unit Operation and OnLine Materials and
Forms
Project Specification
Scope of Works
Project Teams
Marks and Assessments
People who help me in ENB 471
Team
Dear Students
One of the tutors has already uploaded the design of lateral stability systems that covers the concept
design based on AS36002009. The following example demonstrates how to design the lateral stability
system using simplified method (as des
Flat Plates and Flat Slabs
Flat Plates and Flat Slabs
ENB276 Structural Engineering 1
ENB276 Structural Engineering 1
Queensland University of Technology
CRICOS No. 000213J
Design Procedure
Preliminary Sizing  I
Sizing
The following table presents mini
Lateral loads
Lateral loads  from the side
Wind
Earthquake
other threats?
Lateral loads
Lateral loads  from the side
Wind
Earthquake
other threats?
Lateral loads
Lateral loads  from the side
Wind
Earthquake
Stability
Stability structural system
Soil Investigation
&
Foundation Design
Foundation Challenges
Definitions and Key Terms
Foundation: Structure transmits loads to the underlying ground
(soil).
Footing: Slab element that transmits load from superstructure
to ground
Embedment depth (depth
1
Design of Concrete Buildings and
Foundation
ENB 471
Assessment of the existing concrete
structures
By Ario Y. Darestani
2
Agenda
Estimating Material Properties
Checking Reinforcement Arrangements
Estimating Corrosion, Carbonation,
Sulphate rate
Moni
RECOMMENDED PRACTICE
Reinforcement Detailing Handbook
Errata:
The existing section 13.2.3 (a) and Figure 13.4 on page 13:4 should be replaced with:
(a) At all simple supports, a primary calculation is
required in accordance with Clause 8.1.10.4(a)
of AS36
POSTTENSIONING IN BUILDING STRUCTURES
Ed Cross1
BE, Grad.Dip(Tech.Mgt), MIEAust, CPEng
SUMMARY
This paper outlines the major advantages of the use of posttensioning in
building structures. Economics of the posttensioning slab system are
discussed inclu
Practical Prestress Detailing
Disclaimer: "This presentation is for guidance only & is not to be taken as specific advice applicable to a
particular project."
This presentation will only cover bonded posttensioning, because Structural Systems do not clai
There are two components to the applied prestrcss: the
direct axial compression in the concrete section
transferred through the tendon anchorage, and the
upward force from the tendon profile. If the slab is
restrained when the slab is stressed, force may
EXAMPLE
Determine imposed and live loads
Live Loads
Top level (trafficable roof) 3 kPa
Level 1 and 2 1.5 kPa
Super Imposed Dead Loads
Roof level Ave. 100 thick topping slab + ceiling Load = 0.1 x 24.5 + 0.1 kPa = 2.55 kPa
Levels 1 and 2 Partitions, fl

Slab systems
o Flat Plate (common for RC and PT) (2 way system)
o
just spanning to isolated columns. Very economic for formwork
and good speed of construction. But heavier (no beam) need to check for punching
shear.
One Way Slab with Band Beams (PT and
Preliminary Sizing of Columns

Check fire requirements (Cl 5.6.4)
o If aspect ratio > 4:1 then considered as a wall
Calculate preliminary load
Determine sizing using a preliminary design method such as a formula below or checking a
column by a design sof
1
Design of Concrete Buildings and
Foundation
ENB 471
1/04/2012
Schematic Design DD Footings and
retaining Wall
By Ario Y. Darestani
2
1/04/2012
From our previous classes:
Where to start your project and how to
proceed
Selecting Slab type, i.e. twoway o
Design of Concrete Buildings and
Foundation
ENB 471
By Ario Y. Darestani
Agenda
Introduction
Unit Operation and OnLine Materials and
Forms
Project Specification
Scope of Works
Project Teams
Marks and Assessments
People who help me in ENB 471
Team
Note of design of PT slab/bands in DD phase
By Andy T. Nguyen
Disclaimer: "This note is for guidance only for unit ENB471 and is not to be taken as specific advice
applicable to a particular project. With limited time and knowledge, the author makes no wa
This example covers DD of OneWay PT slab supported on band beams.
Students need to review lecture notes on 16 April 2012, 23 April 2012 and 30 March 2012.
22.4.4 Rectangular sections with steel in all four faces
In practice, columns usually carry bending moment about both principal axes and
so it is common to place reinforcing bars in all four faces, as in Fig 2.15. The bars
in the side faces of this colum
Design of Concrete Buildings and
Foundation
ENB 471
Schematic Design  SD
By Ario Y. Darestani
Agenda
Understanding of projects restrictions and
constraints
Factors affecting the design
Assumptions
Load Pass
Lateral stability systems
Design for Grav
Week 1 Summary


The things that produce forces on the buildings:
o Earthquake
o Wind
o Gravity
We apply a factor to account for Variability in the load
We apply a reduction factor to account for inconsistency of materials

Four keys to structural engi