提高混凝土和CFST柱的耐火性

WU, BoSouth China University of TechnologyAugust 13, 2024, SingaporeImprovement of Fire Resistance ofCFST & RC ColumnsOutlineResearch background1Fire resistance ofCFST columns with internal stirrups (IS)2Compression behavior of CFST columns with IS3Seismic performance of CFST columns with IS4Design code & summary65Fire resistance of RC columns with external stirrups (ES)CFSTcolumns:superiorstructuralbehaviorsandeasyofconstruction,butbaresteeltubeleadstopoorfireresistance,andtheuseoffireprotectionisnecessary.Engineering applicationConstruction offireproof layersThin fire-retardant coatingThickfire-retardant coatinglHighcostoffire-retardantcoatingslUncertaintyofthelifecycleeffectivenessoffireprooflayerslSignificantincreaseinsteelusageandhighconstructioncostslConstructiondifficultiesatbeam-columnjoints[1] Chabot M, et al. NRC-CNRC internal report,No. 628, 1992. [3] Romero ML, et al. Eng. Struct., 2015, 99: 536-545. [5] Neuenschwander M, et al. J. Struct. Eng., 2017, 143(4): 04016211.[2]