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Unformatted text preview: CIVL 232 Structural Concrete Design
Assignment 7 (Tuesday, 13 May 2004; Due date: Tuesday, 18 May 2004)
Short columns with uniaxial and biaxial bending, slender columns
1. Design the longitudinal steel and links for a 350 mm square, short braced column
which supports the following axial load: Gk = 1,000 kN, Qk = 1,000 kN, given fcu = 40
N/mm2, fy = 460 N/mm2, fyv = 250 N/mm2.
2. An internal column shown in Fig. 7.2 in a braced two-storey building supports
approximately symmetrical arrangements of beams (350 × 600 mm and 350 × 500
mm in major and minor axes respectively), resulting in characteristic dead and
imposed loads each of 1000 kN being applied to the column. The column is 350 mm
square and the storey height is 5 m. Design the longitudinal reinforcement and links,
given fcu = 40 N/mm2, fy = fyv = 460 N/mm2. 600 500 Column
350mm square Fig. 7.2 3. Design the longitudinal reinforcement and links for a 300 mm square, short-braced
column which supports: (a) an ultimate axial load of 1500 kN and bending moment of
70 kNm about x-x axis; (b) an ultimate axial load of 1500 kN and bending moments
of 50 kNm about x-x axis and 35 kNm about y-y axis. fcu = 40 N/mm2, fy = 460
N/mm2, fyv = 250 N/mm2. 1 4.* A braced slender column of 400 × 500 mm carries an ultimate axial load of 3,000 kN
with the end moments of 200 kNm and 275 kNm about major axis x-x as shown in
Fig. 7.4. Determine the area of reinforcement when the effective height is 7.5 m for
bending about both axes. fcu = 40 N/mm2, fy = 460 N/mm2. d ' = 50 Fig. 7.4 * Optional 2 ...
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This note was uploaded on 12/24/2011 for the course CIVL 232 taught by Professor Jskuang during the Spring '06 term at HKUST.
- Spring '06