Integrated Approach for Post-fire Reinforced Concrete Structures Assessment

Authors

  • Flavio Stochino
    Affiliation
    University of Cagliari
  • Fausto Mistretta
    Affiliation
    University of Cagliari
  • Paola Meloni
    Affiliation
    University of Cagliari
  • Gianfranco Carcangiu
    Affiliation
    Consiglio Nazionale delle Ricerche
https://doi.org/10.3311/PPci.9830

Abstract

In order to assess decay in the mechanical characteristics offire-exposed Reinforced Concrete (RC), it is crucial to reconstructthe temperature time history and the evolution of strainand stress fields. In this paper, the state of the art of assessmentmethods is presented and applied to a real structure damagedby fire. It is a prestressed RC industrial warehouse located inthe outskirts of the city of Cagliari (Italy). The collected data ofseveral assessment methods are presented in order to producethe flowchart of an integrated approach for post-fire investigation.Among the various techniques, the authors highlight athorough laser scanner geometric survey and destructive andnon-destructive testing. In addition, the temperature distributionand its time history has been reconstructed by means ofoptical and Scanning Electron Microscopy, X-ray diffractometry,Thermogravimetric Differential Thermo-Analysis andcalibrated Colorimetry.Actually, refurbishment is needed, but the structure withstoodthe fire very well. Central columns displayed the most importantdamage, and several beams presented important deflectionshaving lost the prestressing actions of the tendons.

Keywords:

structural fire design, reinforced concrete, colorimetry, nondestructive testing, scanning electron microscopy, thermogravimetric differential thermo-analysis

Citation data from Crossref and Scopus

Published Online

2017-03-01

How to Cite

Stochino, F., Mistretta, F., Meloni, P., Carcangiu, G. “Integrated Approach for Post-fire Reinforced Concrete Structures Assessment”, Periodica Polytechnica Civil Engineering, 61(4), pp. 677–699, 2017. https://doi.org/10.3311/PPci.9830

Issue

Section

Research Article