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Civil Engineering/Design "R" letter shape by reinforced concrete

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Expert: - 1/1/2010


Question

R Shape
It's required to design "R" letter shape by reinforced concrete How can I design this? I want to know also the statically system (structural system)? The total loads on the "R" Shape is only (200 kg/m^2 Live load)+ own wight or the dead load). The design will consist of 3 main elements 1-Arch for the upper curve  2-Vertical column 3-inclined column (preferred to be link member).
The height of the vertical column is 5 m , other dimensions can be reasonable assumed to give the required shape, All supports are hinged, see the attach image.... Thank you very much  

Answer
Hi Mado,

The structural system will be as follows, if only gravity loading is considered (i.e. no lateral wind or seismic loading): the inclined column will have only axial compression, the arch will have compression along the bottom half and tension along the top, as well as some local bending.
The vertical column will have axial compression throughout and bending which will be at a maximum at the hinge joint with inclined column. You can get an exact analysis by computer software or an approximate analysis by considering the resultant weight/loading on the arch acting verically some 2/3rd distance from the vertical column.
    Questioner's Rating
    Rating(1-10)Knowledgeability = 10Clarity of Response = 10Politeness = 10
    CommentThank you very much for your answer, Very useful information.


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Arshad Khan

Expertise

I can answer any questions to do with civil and structural engineering consultancy and construction industry in East Africa and the Middle East, and specifically with the analysis and design of reinforced concrete structures. My particular expertise is in the aseismic design and optimisation of tall buildings.

Experience

Employment history: 36 years in Construction and consultancy in the UK, Kenya, Tanzania, Uganda, Ethiopia, Eritrea, South Africa, Somalia, Zambia, Austria, Bahrain, Kuwait, Doha and the U.A.E.

Organizations
.Fellow of Institution of Structural Engineers (UK) .Fellow of Institution of Civil Engineers(UK) .Member of the Institution of Engineers, Kenya .Registered Engineer, ERB, Kenya .Member of the Architectural Association of Kenya (Engineers Chapter) .Chartered Engineer (UK)

Publications
•1984: International Conference on the Art and Practice of Structural Design, London •1994: 3rd Int. Kerensky Conference in Structural Engineering, Singapore •2008: International Conference on High-Rise Towers, Abu Dhabi

Education/Credentials
BSc, 1st Class Hons, in Building Engineering, University of Bath, UK MSc in Concrete Structures and Technology, University of London. Diploma of Imperial College, UK.

Awards and Honors
•Science Congress Special Award (for 2-seater Hovercraft - 1968) •Institution of Civil Engineers Award for outstanding performance at Bath University (1975) •Concrete Society Postgraduate study Bursary Award (1976) •Consular Representative for British High Commission, Nairobi. (1995 to 1998) •Examiner for Institution of Civil Engineers Professional Interviews, Nairobi. (1997 to 1998) •Branch Representative in Vienna for PI assessment for Inst. of Struct. Engrs. (1999 to date)

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