Study of time-dependent effects in craked sections using the multilayer model

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Title: Study of time-dependent effects in craked sections using the multilayer model

Author(s): Iglesias Pérez, C.

Publication: ACHE

Volume: 48

Issue: 206

Appears on pages(s): 27 - 62

Keywords:

Date: 1/8/1997

Abstract:
This paper summarizes the principal results of a thesis whose objective is to set up a model for the service analysis of concrete structures, accounting for delayed effects of creep and self-induced and superimposed deformations. The multilayer model is developed assuming the Navier Law wich relates the analysis at a "cross-section level" with the global analysis at a "structure level". The multilayer model permits to take into account cracking at a "cross-section level", although the assumption of vertical cracking restricts its application to beams in bending. The tension-stiffening effect is considered in a general step-by-step analysis, establishing the self-stress equilibrium in every time interval. This method of analysis may be classified among stress relaxation procedures, from which follows the implementation of a model, that has been checked at a sec-tion level, at a structure level and compared with creep tests.


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