Unit 30: Structural Analysis & Design

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Unit 30: Structural Analysis & Design


SIHE Unit Reference: CON260



BTEC Unit Reference 3212S


Credit Points: 15


Parent Course: Higher Nationals Con. & B. E.

Delivering Faculty: Technology


Level (on parent course): 1 (BTEC H1)


Date Validated: May 20
01


TOTAL STUDENT WORKLOAD






Students are required to attend and participate in all the formal timetabled sessions for the
unit. Students are also expected to manage their directed learning and independent study
in support of the unit.


Where normal t
imetabled sessions do not take place, additional directed learning may be
provided, and/or students are expected to undertake additional independent learning
.


PREQUISITES

Study of


Design Principles & Application, Science & Materials, and Analytical
Met
hods


Description of Unit

This unit develops the student’s ability to analyse simple structures and produce an appropriate
design. The unit builds on techniques and understanding of structural behaviour developed in
Science & Materials.

The unit aims to

provide the student with the basic analysis and design knowledge required to
carry out the design of common structural elements to the appropriate British Standard, Code of
Practice or European Code of Practice.

The student is encouraged to work with sim
ple real life examples and to gain the skills and
understanding to develop effective and economic designs.


Summary of outcomes

To achieve this unit a student must:

1

Calculate
bending moments and shear forces

for simple structures

2

Explore
bending deflection
s

for simple structures

3

Explore the behaviour of
elastic columns

under axial loading

4

Examine
design methods for simply supported beams

in steel, reinforced concrete and
timber

5

Examine
design methods for columns

in steel, reinforced concrete, timber and m
asonry.


Summary of Outcomes

1

Bending moments and shear forces

Analyse cantilevers and simply supported beams
: evaluate cantilevers and simply supported
beams with a number of point loads and uniformly distributed loading, using superposition
techniques d
etermine the bending moment diagrams and shear force diagrams for the beams

Analyse three pin frames
: evaluate three pin frames with inclined, horizontal and vertical
members with a number of point loads and uniformly distributed loading, determine the
ben
ding moment diagrams and shear force diagrams for the frames

2

Bending deflections

Bending deflections for cantilevers and simply supported beams
: Using Mohr's Moment
-
area
method, or Macauley’s method, determine the maximum deflection for cantilevers and s
imply
supported beams of uniform section carrying a point load or an uniformly distributed load,
explore the effect of different materials and beam section on bending deflection in beams.

3

Elastic columns

Behaviour of slender elastic columns under axial l
oading
: Investigate elastic buckling, using
Euler’s method determine the critical load for an elastic column, investigate the concept of
effective length.

4

Design methods for simply supported beams

Produce valid designs for simply supported beams in steel
: examine the concept of limit state
design as applied to steel, examine classification of sections, determine the suitability of
UB/UC sections regarding moment capacity, shear resistance and deflection.

Produce valid designs for simply supported beams in

reinforced concrete
: examine the
concept of limit state design as applied to reinforced concrete, determine the reinforcing
requirements and the deflection performance of singly reinforced rectangular beams.

Produce valid designs for simply supported beam
s in timber
: examine the natural
characteristics of timber and evaluate how these affect the design methods, determine the
suitability of rectangular beams regarding moment capacity, shear capacity, bearing capacity
and deflection.

5

Design methods for col
umns

Produce valid designs for columns in steel
: examine the buckling characteristics of UC, UB
and SHS sections, determine the axial load capacity of slender axially loaded sections with
bending moments about the major axis.

Produce valid designs for sho
rt columns in reinforced concrete
: determine design status of
column, determine the reinforcing requirements of a short reinforced column under axial load
with bending moments about one axis

Produce valid designs for columns in timber
: determine the axial
load capacity of slender
rectangular timber sections

Produce valid designs for columns in masonry
: determine the vertical load capacity of square
and rectangular masonry columns.


Outcomes and Assessment Criteria

Outcomes

Assessment criteria

To achieve ea
ch outcome the student must demonstrate the
ability to:

1

Calculate
bending
moments and
shear forces
for
simple structures



Calculate the bending moments and shear forces in a simply
supported beam with both point loading and uniformly
distributed loading an
d draw the bending moment and shear
force diagrams



Calculate the bending moments and shear forces in a three pin
frame with both point loading and uniformly distributed loading
and draw the bending moment and shear force diagrams.

2

Explore
bending
deflecti
ons
for
simple structures



Calculate mid span bending deflection in a simply supported
beam with point loading and also in a simply supported beam
with uniformly distributed loading .

3

Explore the
behaviour of
elastic columns
under axial
loading



Calculate t
he axial load carrying capacity of perfectly elastic
columns with differing end conditions.

4

Examine
design
methods for
simply supported
beams
in steel,
reinforced
concrete and
timber



Produce a valid design for a steel beam



Produce a valid design for a
reinforced concrete beam



Produce a valid design for a timber beam.

5

Examine
design
methods for
columns
in steel,
reinforced
concrete, timber
and masonry



Produce a valid design for a steel section column



Produce a valid design for a short reinforced concret
e column



Produce a valid design for a timber column



Produce a valid design for a masonry column.

Delivery

Students will, in general, work individually, however some group work may be useful in
classroom situations. Emphasis will be placed on manual analy
sis techniques to determine the
values required for the subsequent design procedures. The designs of the structural elements can
be simple but will fully comply with the appropriate current standards. It is important that the
students become familiar wit
h current design practice of comparing capacity with load rather than
applied stress to allowable stress.



Assessment (Genesis Data)


In Unit
assessment

IU1

weighting %:


60%


assessment type:

Assignments and workbook


duration:


In course


special fac
ilities:

None Required


additional details:

The pass mark for this element is Pass Minus P
-

(35%)


End of Unit
assessment

ET1

weighting %:


40%


assessment type:

Examination


duration:


2 hours


special facilities:

None required


additional details:

T
he pass mark for this element is Pass Minus P
-

(35%)


Common Skills should be assessed on 30% of the in unit assessment load and should
be from areas associated with team activities, testing processes, communication, task
management, numeracy and the app
lication of information technology.


Assessment Strategy


To assist learning, there will be frequent use of design problems to familiarise the student
with the process of

Structural Analysis & Design
. The in unit assessments and end test
will be designed t
o integrate this process as well as to satisfy the designated
learning
outcomes.


Suggested Reading

Gere J, Timoshenko S
-

Mechanics of Materials
(4
th

edition, Stanley Thornas, 1996)

Seward D
-

Understanding Structures

(Macmillan, 1998)

Draycott T
-

Stru
ctural Elements Design Manual
(Butterworth
-
Heinemann, 1990)

Williams M, Todd J
-

Structures: Theory and Analysis
(Macmillan, 1999)