Structural damage evaluation of industrial masonry chimneys

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Title: Structural damage evaluation of industrial masonry chimneys
Authors: Bru, David | Reynau, Ricardo | Baeza, F. Javier | Ivorra, Salvador
Research Group/s: Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES) | Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: Industrial chimney | Masonry | Lime mortar | Damage | Corrosion | Fem
Knowledge Area: Mecánica de Medios Continuos y Teoría de Estructuras
Issue Date: Feb-2018
Publisher: Springer Netherlands
Citation: Materials and Structures. 2018, 51:34. doi:10.1617/s11527-018-1158-3
Abstract: This document presents a systematic analysis of the damage causes of industrial masonry chimneys, i.e. cracking patterns, materials’ degradation and structural displacements. The methodology includes an adequate geometric evaluation with identification of each observed lesion, their situation and their environmental conditions. The industrial process temperatures have been documented, hence maximum temperatures and gradients during chimney’s service life were evaluated, and any possible crack pattern because thermal loads was analyzed. In addition, chemical composition (SEM, EDS and DRX) and mechanical properties (compressive and bending strengths) were assessed. Microstructural analyses were useful to detect certain elements and compounds related to corrosion or degradation processes of mortar and steel. Analytical and FE models were made to evaluate the influence of each possible damage source, i.e. temperature gradients, corrosion and chemical reactions producing expansion in the mortar. The effect of internal pressures (because corroded steel) were successfully modelled as spring elements in vertical and horizontal cracks, which matched experimental data obtained in real structures. These results have demonstrated the relation between horizontal displacements of the crown and the position of the internal stairs (made in steel bars embedded in the masonry). Once cracked, either by corrosion or by temperature, the water entrance through the cracks produces chemical reactions with the combustion sulphurs, present in the mortar because of combustion gasses. These reactions generate an expansion inside the masonry located only in one façade. Hence, differential displacements generate the curvature and the consequent drift.
Sponsor: This study was partially funded by Spanish Ministry of Economy, Industry and Competiveness (BIA2012-3431) and (BIA2015-69952-R) This study was partially funded by the University of Alicante VIGROB-212.
ISSN: 1359-5997 (Print) | 1871-6873 (Online)
DOI: 10.1617/s11527-018-1158-3
Language: eng
Type: info:eu-repo/semantics/article
Rights: © RILEM 2018
Peer Review: si
Publisher version:
Appears in Collections:INV - DMCIA - Artículos de Revistas
INV - GRESMES - Artículos de Revistas

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