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Unformatted text preview: CIVL 232 Design of Structural Concrete
Assignment 5: Anchorage bond and laps in reinforcement, design for torsion
Assigned: Tuesday 11 April 2006
Due date: Thursday 20 April 2006 5.1 A cantilever beam with an overall depth h = 300 mm is shown in Fig. 5.1. The 25
mm diameter deformed steel reinforcing bars are used as the main bars in the
beam. The characteristic material strengths are fcu = 30 N/mm2 and fy = 460
N/mm2. Determine the total anchorage length required, when
(a) straight bars are used;
(b) 180° standard hooks are used; and
(c) 90° standard bends are used.
T20 bars
h
1800 Fig. 5.1 5.2 In Fig. 5.2, column starter bars in the pad footing are T25 and the vertical bars in
the column are T20. Determine the lap length required. fcu = 35 N/mm2. Fig. 5.2 5.3 A rectangular RC beam with a section of 300 mm wide and 500 mm deep has been
designed for bending, where the estimated areas of tension and compression
reinforcement are 2800 mm2 and 700 mm2, respectively. If the section is subjected
to ultimate shear force of 250 kN and ultimate torsional moment of 30 kNm.
Determine a suitable arrangement of shear and torsional reinforcement and sketch
the reinforcement layout. fcu = 30 N/mm2, fy = 460 N/mm2, fyv = 250 N/mm2. 5.4 A beam section is to be designed as shown in Fig. 5.4. If a torsional moment will
be applied to the member, determine the factored applied torque. fcu = 30 N/mm2,
fy = 460 N/mm2, fyv = 250 N/mm2. 2T16 Fig. 5.4 ...
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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
 JSKUANG

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