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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fire experiments on cold-formed steel square tubular columns with new gypsum sheathing configuration
https://orcid.org/0000-0002-6230-374X
Highlights New fire-protection configuration for CFSST columns was proposed and tested. Utilized gypsum plasterboard and aluminum silicate sheathing layers. Analyses used experimental and finite-element methods. Proposed new configuration considerably enhances fire resistance. Recommendations based on the new configuration were provided.
Abstract Previous fire experimental investigations on cold-formed steel square tubular (CFSST) columns have predominantly focused on their structural behavior without fire protection. This study introduces a fire protection configuration for CFSST columns, utilizing thin-wall angle steel and studs for connections, with gypsum plasterboard (GP) and aluminum silicate (AS) cotton as sheathing materials. Four full-scale CFSST columns equipped with this new fire-protection configuration underwent fire experiments under a load ratio of 0.6. A comparative specimen was also tested under axial compression at ambient temperature. The experiments provided deformation and temperature curves during fire exposure. Additionally, the impact of varying fire protection thicknesses on specimen performance was examined. All tested specimens exhibited a failure mode of full-section local buckling, and the maximum fire resistance duration was 183 min. The time–temperature curve of the CFSST columns' steel surface, using approximately 110 °C as a threshold, can be categorized into slow-rise and rapid linear-rise stages. A finite-element heat-transfer model for this new configuration was developed and validated using experimental results. Numerical simulations demonstrated that this configuration effectively mitigates the negative effects of thermal bridges and AS cotton detachment, outperforming previous designs. Under a load ratio of 0.6, the fire resistance duration of CFSST columns increased by approximately 28.7 min for each additional 12 mm layer of GP and by approximately 36.4 min for every 30 mm increase in AS cotton thickness. Recommendations based on this new fire-protection configuration were proposed, significantly enhancing the fire resistance of cold-formed steel structures.
Fire experiments on cold-formed steel square tubular columns with new gypsum sheathing configuration
https://orcid.org/0000-0002-6230-374X
Highlights New fire-protection configuration for CFSST columns was proposed and tested. Utilized gypsum plasterboard and aluminum silicate sheathing layers. Analyses used experimental and finite-element methods. Proposed new configuration considerably enhances fire resistance. Recommendations based on the new configuration were provided.
Abstract Previous fire experimental investigations on cold-formed steel square tubular (CFSST) columns have predominantly focused on their structural behavior without fire protection. This study introduces a fire protection configuration for CFSST columns, utilizing thin-wall angle steel and studs for connections, with gypsum plasterboard (GP) and aluminum silicate (AS) cotton as sheathing materials. Four full-scale CFSST columns equipped with this new fire-protection configuration underwent fire experiments under a load ratio of 0.6. A comparative specimen was also tested under axial compression at ambient temperature. The experiments provided deformation and temperature curves during fire exposure. Additionally, the impact of varying fire protection thicknesses on specimen performance was examined. All tested specimens exhibited a failure mode of full-section local buckling, and the maximum fire resistance duration was 183 min. The time–temperature curve of the CFSST columns' steel surface, using approximately 110 °C as a threshold, can be categorized into slow-rise and rapid linear-rise stages. A finite-element heat-transfer model for this new configuration was developed and validated using experimental results. Numerical simulations demonstrated that this configuration effectively mitigates the negative effects of thermal bridges and AS cotton detachment, outperforming previous designs. Under a load ratio of 0.6, the fire resistance duration of CFSST columns increased by approximately 28.7 min for each additional 12 mm layer of GP and by approximately 36.4 min for every 30 mm increase in AS cotton thickness. Recommendations based on this new fire-protection configuration were proposed, significantly enhancing the fire resistance of cold-formed steel structures.
Fire experiments on cold-formed steel square tubular columns with new gypsum sheathing configuration
https://orcid.org/0000-0002-6230-374X
Highlights New fire-protection configuration for CFSST columns was proposed and tested. Utilized gypsum plasterboard and aluminum silicate sheathing layers. Analyses used experimental and finite-element methods. Proposed new configuration considerably enhances fire resistance. Recommendations based on the new configuration were provided.
Abstract Previous fire experimental investigations on cold-formed steel square tubular (CFSST) columns have predominantly focused on their structural behavior without fire protection. This study introduces a fire protection configuration for CFSST columns, utilizing thin-wall angle steel and studs for connections, with gypsum plasterboard (GP) and aluminum silicate (AS) cotton as sheathing materials. Four full-scale CFSST columns equipped with this new fire-protection configuration underwent fire experiments under a load ratio of 0.6. A comparative specimen was also tested under axial compression at ambient temperature. The experiments provided deformation and temperature curves during fire exposure. Additionally, the impact of varying fire protection thicknesses on specimen performance was examined. All tested specimens exhibited a failure mode of full-section local buckling, and the maximum fire resistance duration was 183 min. The time–temperature curve of the CFSST columns' steel surface, using approximately 110 °C as a threshold, can be categorized into slow-rise and rapid linear-rise stages. A finite-element heat-transfer model for this new configuration was developed and validated using experimental results. Numerical simulations demonstrated that this configuration effectively mitigates the negative effects of thermal bridges and AS cotton detachment, outperforming previous designs. Under a load ratio of 0.6, the fire resistance duration of CFSST columns increased by approximately 28.7 min for each additional 12 mm layer of GP and by approximately 36.4 min for every 30 mm increase in AS cotton thickness. Recommendations based on this new fire-protection configuration were proposed, significantly enhancing the fire resistance of cold-formed steel structures.
Fire experiments on cold-formed steel square tubular columns with new gypsum sheathing configuration
Yin, Liang (Autor:in) / Li, Rui (Autor:in) / Wang, Xinyu (Autor:in) / Chen, Wei (Autor:in) / Ye, Jihong (Autor:in) / Wu, Xian (Autor:in)
Thin-Walled Structures ; 198
17.02.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
New fire-protection configuration , Gypsum sheathing , Full-scale fire experiment , Cold-formed steel square tubular columns , Aluminum silicate cotton , Finite element analysis , CFSST , cold-formed steel square tubular , GP , gypsum plasterboard , AS , aluminum silicate , CFS , cold-formed steel , CS , calcium silicate , AAC , ambient axial compression , ASC , AS cotton , LVDT , linear variable displacement transducer , CT , cavity temperature , ST , surface temperature , OT , outer temperature , N-FE model , new configuration finite element model , P-FE model , previous configuration finite element model , FE , finite element simulation , TE , the test experiment
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