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A platform for research: civil engineering, architecture and urbanism
Flexural tests of concrete-encased composite girders with high-strength steel angle
Abstract This study investigated the flexural behavior of concrete-encased steel angle girders (PSRC girders). Inside the concrete section, high-strength steel angles (F y = 605 MPa) with unequal legs were used as longitudinal reinforcement, and diagonal and vertical members were bolt-connected to the longitudinal angles as transverse ties. Flexural tests were performed for three PSRC girder specimens with different reinforcement details. The tests showed that the PSRC girders all developed the peak loads exceeding the nominal strengths; however, the ductility was limited as rupture occurred near bolt holes in the longitudinal angles. Overall, the concrete damage and cracking of the PSRC girders were comparable to those in conventional reinforced concrete beams, and cover spalling and bond deterioration along the longitudinal angles were not severe. The strength, stiffness, and ductility estimated in accordance with current design codes were compared with the test results. Given the investigation results, the application and design considerations of PSRC girders were discussed.
Graphical abstract Display Omitted
Highlights Concrete-encased steel angle girders under flexural loading are investigated. High-strength steel angles fabricated by cold-forming are used as reinforcement. Flexural tests of large-scale composite girders are presented. Bolt holes reduce the strength and ductility of composite girders. Concrete cracking and spalling can be reduced by steel forms as permanent sheathing.
Flexural tests of concrete-encased composite girders with high-strength steel angle
Abstract This study investigated the flexural behavior of concrete-encased steel angle girders (PSRC girders). Inside the concrete section, high-strength steel angles (F y = 605 MPa) with unequal legs were used as longitudinal reinforcement, and diagonal and vertical members were bolt-connected to the longitudinal angles as transverse ties. Flexural tests were performed for three PSRC girder specimens with different reinforcement details. The tests showed that the PSRC girders all developed the peak loads exceeding the nominal strengths; however, the ductility was limited as rupture occurred near bolt holes in the longitudinal angles. Overall, the concrete damage and cracking of the PSRC girders were comparable to those in conventional reinforced concrete beams, and cover spalling and bond deterioration along the longitudinal angles were not severe. The strength, stiffness, and ductility estimated in accordance with current design codes were compared with the test results. Given the investigation results, the application and design considerations of PSRC girders were discussed.
Graphical abstract Display Omitted
Highlights Concrete-encased steel angle girders under flexural loading are investigated. High-strength steel angles fabricated by cold-forming are used as reinforcement. Flexural tests of large-scale composite girders are presented. Bolt holes reduce the strength and ductility of composite girders. Concrete cracking and spalling can be reduced by steel forms as permanent sheathing.
Flexural tests of concrete-encased composite girders with high-strength steel angle
Lim, Jong-Jin (author) / Kim, Jin-Yong (author) / Kim, Jin-Won (author) / Eom, Tae-Sung (author)
2021-03-09
Article (Journal)
Electronic Resource
English
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