Unformatted text preview: CIVL 232 Design of Structural Concrete
Assignment 3: Doubly reinforced and flanged sections in bending
Assigned: Thursday 9 March 2006
Due date: Thursday 16 March 2006 50 3.1 The section shown in Fig. 31is to resist an ultimate design moment of 330 kNm.
Determine the areas of reinforcement required. fcu = 30 N/mm2 and fy = 460 N/mm2. 550 A's As
250 Fig. 31
3.2 Determine the ultimate moment of resistance of the crosssection shown in Fig. 32.
′
fcu = 30 N/mm2 and fy = 460 N/mm2. (a) As = 2454 mm2 and As = 942 mm2; and (b) 50 As = 2454 mm2 and As′ = 1472 mm2. 500 A's As
300 Fig. 32 350 100 3.3 The Tsection beam shown in Fig. 33 is required to resist a design ultimate moment
of 180 kNm. Calculate the area of reinforcement required, (a) without, and (b) with
the assumption x = 0.5d (the code method). fcu = 30 N/mm2 and fy = 460 N/mm2. As
100 200 100 Fig. 33 d = 500 hf =
100 3.4 Determine the ultimate moment of resistance of the Tsection shown in Fig. 34. (a)
As = 4700 mm2; and (b) As = 5500 mm2. b = 1100 mm, bw = 350 mm, hf = 100 mm, d
= 500 mm; fcu = 30 N/mm2 and fy = 460 N/mm2. 375 bw = 350 375 b = 1100 Fig. 34 8T25 150 350 150 900 75 75 650 150 3.5 Determine the ultimate moment of resistance of the crosssections shown in Fig. 35.
fcu = 30 N/mm2 and fy = 460 N/mm2. 650 Fig. 35 ...
View
Full
Document
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
 JSKUANG

Click to edit the document details