Materials And structurs - Structural Design Actions
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assignment_1.pdf
Author: Dr Sawekchai Tangaramvong (July 2013) 1 of 5
CVEN2302 Materials and Structures – Design Strand
Assignment 1: Structural Design Actions
Name:_____________________________________ Student No.:_____________________
Name:_____________________________________ Student No.:_____________________
The work contained within is solely the work of ______________________________________
and____________________________________________ except where clear reference is
made within the text of the assignment to a third party.
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Item Full mark Allocated mark
Question 1 7
Question 2 3
Total mark 10
Author: Dr Sawekchai Tangaramvong (July 2013) 2 of 5
CVEN2302 Materials and Structures – Design Strand
Assignment 1: Structural Design Actions
Total number of Questions: 2
Submission Date: This assignment is to be submitted to the assignment box labelled
“Tangaramvong” on 6 th Floor in CE Building (next to the computer lab) by 5.00pm on Friday
30 August 2013, Week 5. Late submissions will NOT be accepted!
• You may form a group of maximum 2 people. Where identical, or near identical
assignments are submitted such that it is apparent that one is essentially a copy of another
then BOTH assignments will receive a mark of ZERO regardless of which one is the
original and which one is the copy.
On the front cover of your submission provide your names and student numbers along with the
statement:
The work contained within is solely the work of ______________________________________
and____________________________________________ except where clear reference is
made within the text of the assignment to a third party. By signing below, we understand and
accept the agreements listed at the end of this current page.
________________________________ _______________________________________
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AGREEMENTS
• Assignments received without the above statement will not be marked.
• If working as a group then both students will receive equal marks regardless of
contribution.
• All drawings and calculations must be able to be read without pulling your assignment
apart.
Author: Dr Sawekchai Tangaramvong (July 2013) 3 of 5
Question 1
For the floor plan shown in Fig. 1, the permanent loads consist of:
o Bondek composite (1-way) slabs spanning (see arrows) over 3 m = 3.7 kPa o Ceilings and services (allowing 500 mm headroom) = 0.3 kPa o Ceramic floor tiles = 0.15 kPa o Partitions = 1.5 kPa
Both secondary and primary beams “A” and “B” are simply supported, where the primary beams support the secondary beams. They are provided with fire spray (i.e. permanent load of 0.6 kN/m) for 2 hrs fire resistivity. Assume the self-weight of steel beams “A” and “B” is 1 kN/m. As structural engineers, your tasks are to:
(i) Determine the design (factored permanent and imposed) loads for typical steel beam (secondary beam "A" with its span of 6 m) and girder (primary beam "B" with its span of 9 m) for the office building shown in Fig. 1 (see AS1170.1 for imposed loads) that complies with AS1170.0 for:
(a) Strength limit state
(b) Serviceability limit state (short term and long term)
You must demonstrate your answers through detail calculations and relevant tributary diagrams. [2 marks]
[Hints: Loading path follows floor → beam “A” → beam “B” → column]
(ii) Determine the maximum deflections of these beams “A” and “B” under the short term and long term service loads. [1 mark]
(iii) Select minimum UB (or WB) -sections (from OneSteel products) for these beams “A” and “B” that satisfy the short-term deflection limit of span/250. [1 mark]
(iv) Draw BMD and SFD of these beams “A” and “B” for Strength limit state, and determine the maximum design moment (M
* ) and the design shear (V
* ). [1 mark]
(v) For the three story building composing of three identical floor layouts in Fig. 1, determine the design (factored permanent and imposed) loads for the two columns “C” and “D” at the ground floor complying with AS1170.0 for:
(a) Strength limit state
(b) Serviceability limit state (short term and long term)
Assumed the height of all columns at each floor is 3.5 m, and the self-weight of both columns “C” and “D” is 1 kN/m.
You must demonstrate your answers through detail calculations and relevant tributary diagrams. [2 marks]
Author: Dr Sawekchai Tangaramvong (July 2013) 4 of 5
Figure 1
6 m 6 m
Typical beams “A” P ri
m a
ry b
e a
m “
B ”
3 @
3 m
= 9
m
Column “C” Column “D”
Author: Dr Sawekchai Tangaramvong (July 2013) 5 of 5
Question 2
For the floor plan shown in Fig. 2, the permanent loads consist of:
o Concrete (2-way) slab with depth of 200 mm = 4.8 kPa o Ceilings and services (allowing 500 mm headroom) = 0.3 kPa o Ceramic floor tiles = 0.15 kPa o Partitions = 1.5 kPa
Both secondary and primary beams “A” and “B” are simply supported, and they are provided with fire spray (i.e. permanent load of 0.6 kN/m) for 2 hrs fire resistivity. Assume the self-weight of all steel beams “A” and “B” is 1 kN/m. As structural engineers, your tasks are to:
(vi) Determine the design (factored permanent and imposed) loads for steel beam (secondary beam "A" with its span of 6 m) and girder (primary beam "B" with its span of 9 m) for the office building shown in Fig. 1 (see AS1170.1 for imposed loads) that complies with AS1170.0 for:
i. Strength limit state
ii. Serviceability limit state (short term and long term)
You must demonstrate your answers through detail calculations and relevant tributary diagrams. [2 marks]
[Hints: The concept is similar to that in Question 1, except the 2-way slab system is now involved.]
(vii) Draw BMD and SFD of these beams “A” and “B” for Strength limit state, and determine the maximum design moment (M
* ) and the design shear (V
* ). [1 mark]
Author: Dr Sawekchai Tangaramvong (July 2013) 6 of 5
Figure 2
6 m 6 m
Secondary beam “A”
P ri
m a
ry b
e a
m “
B ”
2 @
4 .5
m =
9 m
