Assignment-5.CIVL232.Spring_2006 - CIVL 232 Design of...

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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.

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