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STR 654 April 2009 Sherif A. Mourad

Cairo University M.Sc. Structural Engineering

Faculty of Engineering STR 654 Quiz No. 3

Structural Eng. Dept. Inspection, Maintenance, and Repair of Steel Structures Time: 15 Minutes

Name: .

Notes: Open book exam. Notes and homework solutions are allowed.

Any missing data should be reasonably assumed

Clear handwriting and neat sketches are strictly required

Question 1:

It is required to strengthen an existing 3-story steel building. The following table summarizes the existing

straining actions, straining actions during repair, and final straining actions for one of the elements.

Check the adequacy of the new section for this element.

Section Original

straining

action

Straining

actions during

repair

Final straining

action

Original

X-section

Final

X-section

Beam 6.0 mt 4.0 mt 9.0 mt IPE 270 IPE 270 + Top andbottom plates 200x8 mm

Design information:

Beam

(IPE 270)

A=45.9 cm2

Z=429cm3

Lu = 0 Ix=5790cm4

ix=11.2cm tw = 6.6 mm tf= 10.2 mm

bf= 135 mm

Question 2:Suggest THREE more ideas to strengthen the beam to be able to sustain the higher loads.

7/27/2019 Quiz_3_Jan_2010

2/2

STR 654 April 2009 Sherif A. Mourad

Cairo University M.Sc. Structural Engineering

Faculty of Engineering STR 654 Quiz No. 3

Structural Eng. Dept. Inspection, Maintenance, and Repair of Steel Structures Time: 15 Minutes

Name: .

Notes: Open book exam. Notes and homework solutions are allowed.Any missing data should be reasonably assumed

Clear handwriting and neat sketches are strictly required

Question 1:

It is required to strengthen an existing 3-story steel building. The following table summarizes the existing

straining actions, straining actions during repair, and final straining actions for one of the elements.

Check the adequacy of the new section for this element.

Section Original

straining

action

Straining

actions during

repair

Final straining

action

Original

X-section

Final

X-section

Column 150 tons 50 tons 200 tons HEA 340 HEA 340 +

2 plates 350 x 12

Design information:

Column

(HEA340)

A=133 cm2

Bf= 300mm

H = 330mm

Lx=900cm Ix=27690cm4

ix=14.4cm

Ly=300cm Iy=7440cm4

iy=7.46cm

Question 2:

Suggest THREE more ideas to strengthen the column to be able to sustain the higher loads.