Influence of tension stiffening on deflection of reinforced concrete structures
Technical Report 59
Document Status
Current
Supplement
Civil & Structural Supplement
Series
Technical Report
Abstract
Loss of tension stiffening is one of three basic phenomena of concrete behaviour which leads to deflections increasing with time. It is related to the interaction of the reinforcement and the concrete. No formulae have been developed to predict how tension stiffening changes over time. In the long term, it reduces to about half its initial value. How rapidly this reduction occurs has not been studied. This makes it difficult to calculate the development of the deflections of slab structures with time. The research programme described in this report was mainly set up to solve this problem. It compares the methods of predicting deformations in BS 8110 and other design codes, including the forthcoming Eurocode 2. On the basis of the experimental work undertaken, simple modifications to the Codes are proposed to take account of the improved understanding of the behaviour of the concrete tension zone. Guidance is also given on the application of the improved understanding to non-linear programs for the serviceability limit state.
History
Accompanying CD ROM not available on The Construction Information Service.
ISBN
9781904482086
Subjects
- Building structure
- Concrete building systems/frame
- Building systems/frame
Publisher History
For more than 30 years, The Concrete Society has been publishing technical reports and advice notes to serve the needs of clients, architects, engineers, specifiers, suppliers, contractors and users of concrete.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
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