City Research Online

Abstract

This work is concerned with thermal stresses and deformations in structures generally. It is now well known, and is confirmed by observations of structures, that high stresses can develop due to thermal effects even at ambient temperature changes. These are usually evidenced by the appearance of extensive cracking and deflections, and sometimes by premature deterioration of concrete, In spite of considerable research into various thermal aspects, the information at present available to a practising engineer is insufficient, and these effects are therefore rarely adequately included at the design stage.

In this work, methods of predicting thermal stresses and deformations in structures, suitable for practical application in office conditions, are developed, Particular attention is paid to the basic structural forms used in practice, such as portal frames, multi-storey frames, braced frames, trusses and box girders, Other forms not discussed here may also be dealt with in a similar way, based on principles developed for these basic forms of structures, The effects of axial stresses arising from temperature changes and the effect of temperature of hydration of cement combined with early shrinkage of concrete were also investigated.

The validity of the assumptions made in the theoretical formulations was checked and confirmed by several experiments conducted on micro-concrete and perspex models.

Experiments were also conducted to investigate the thermal response and properties of concrete which are required in the analysis,

Publication Type:	Thesis (Doctoral)
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
Departments:	School of Science & Technology > Department of Engineering School of Science & Technology > School of Science & Technology Doctoral Theses Doctoral Theses

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