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Flexural Behavior Of Nonposttensioned And Posttensioned Concrete-Filled Circular Steel Tubes, Christopher Tuan
Flexural Behavior Of Nonposttensioned And Posttensioned Concrete-Filled Circular Steel Tubes, Christopher Tuan
Christopher Y. Tuan
Concrete-filled steel tubes CFTs have recently been used for columns and bridge piers, especially in seismic regions, for their enhanced strength and ductility over the conventional steel and concrete construction. This enhancement is due to the composite actions of the concrete infill and the steel tube: The concrete compressive strength is significantly increased by the lateral confinement provided by the steel; and local buckling of the steel tube is delayed by the concrete infill. Similar enhancement has also been observed in flexural strength of CFT. A novel concept of posttensioning the concrete core inside circular steel tubes to further enhance …
Flexural Strength Analysis Of Non-Post-Tensioned And Post-Tensioned Concrete-Filled Circular Steel Tubes, Yaohua Deng, Christopher Tuan, Q. Zhou, Y. Xiao
Flexural Strength Analysis Of Non-Post-Tensioned And Post-Tensioned Concrete-Filled Circular Steel Tubes, Yaohua Deng, Christopher Tuan, Q. Zhou, Y. Xiao
Christopher Y. Tuan
Concrete-filled circular steel tubes (CFT) have recently gained significant attention for their enhanced strength and ductility over the conventional steel and reinforced concrete construction. The concrete compressive strength is significantly increased by the lateral confinement provided by the steel tube and local buckling of the steel tube is restrained by the concrete infill. This paper investigates the further enhancement of these composite actions due to post-tensioning the concrete cores inside circular steel tubes. The flexural behavior of a post-tensioned CFT as well as a non-post-tensioned CFT was studied experimentally and analytically. A numerical algorithm for predicting the moment capacities of …