You are here:

Civil Engineering/Inclined RCC columns

Advertisement

Expert: - 9/26/2009


Question
Dear Sir,
Due to architectural requirements I have requirement of providing an inclined column. can you please guide me on what steps I should take to Analyse and design it ??
Ïs there any books giving their design and also about the masonary wall which i have to provide inclines, what precations and procedure I should take up, is it even possible ??
thank you sir
||I have learnt so much just by asking you .

Answer
Hi Syed,

You have asked me this question before and I answered it on 16th March as follows:

The main secondary effect of having inclined columns is that they introduce a horizontal component of the axial load into the beams/floor slabs at each level, so you need to design for these forces.

Also, you need to be careful about additional moments caused within each floor height of column due to eccentricity of vertical loading.

Depending on the amount of inclination, you may also need to cater for net tension in columns in the upper storeys of a multi-storey tower, caused by lateral wind or seismic loading.


They can be designed as vertical columns but taking care to design for the additional moments due to self weight and also the additional shear forces due to the inclination. I am assuming that the incination is not more than 30% to the vertical.

Inclined masonry should be done so that all courses remain horizontal/vertical- in other words, the bottom course should be done on a series of steps, like for stairs.  

Civil Engineering

All Answers

Answers by Expert:

Ask Experts

Volunteer

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)

©2012 About.com, a part of The New York Times Company. All rights reserved.