High-temperature performance of damaged reinforced concrete columns under post-earthquake fires. Issue 2 (1st February 2021)

• Record Type: Journal Article
• Authors: Wen, Bo; Zhang, Lu; Wu, Bo; Niu, Ditao
• Is Part Of: Structure and infrastructure engineering. Volume 17:Issue 2(2021)
• Page Start: 260
• Page End: 274
• Publication Date: 2021-02-01
• Subjects: Failure mode -- geometric-damage -- high-temperature bearing capacity -- high-temperature performance -- Post-earthquake fire -- residual deformation -- thermal field; Structural analysis (Engineering) -- Periodicals; Structural engineering -- Periodicals; Buildings -- Performance -- Periodicals; 620.005
• DOI: 10.1080/15732479.2020.1736584
• Languages: English
• ISSNs: 1573-2479

Abstract

Abstract: Post-earthquake fires (PEF) are a frequent phenomenon of earthquakes and usually causes severe damage to reinforced-concrete (RC) columns. To determine the high-temperature performance of RC columns damaged by PEF, the geometric-damage forms of concrete columns after an earthquake are mainly classified as cracking, concrete spalling, and residual deformation on the basis of existing hazard and experimental data. Full-scale seismic-damage column tests were performed to analyse the failure mode of components at a high temperature. Subsequently, the relative depth of cracks, thickness of concrete spalling, relative height of spalling, and residual deformation were proposed as geometric-damage parameters to calculate the thermal-field distribution. Finally, according to the relation between the geometric-damage parameters and the bearing capacity, equations for predicting the high-temperature bearing capacity of PEF concrete columns were established.