A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Concrete filled double skin circular tubular beams with large diameter-to-thickness ratio under shear
Abstract Concrete filled double skin circular tubular (CFDST) members consist of double concentric circular steel tubes with concrete sandwiched between them. Having hollow cross-section, CFDST members are lighter than ordinary concrete filled steel tubular (CFT) members, which have solid cross-sections. Therefore, by alleviating seismic force against the foundation during earthquake, CFDST members can be effectively applied to seismic resistant structures such as a high raise bridge pier. The present study aims to investigate shear characteristics of deep CFDST beams experimentally through an asymmetric static four-point loading test. Two main parameters were selected, namely, the diameter-to-thickness and the inner-to-outer diameter ratios. The results showed that the shear resistance of CFDST gradually decreased as inner-to-outer diameter ratio increased. Methods to predict the shear resistance of deep CFDST beams are also provided. Additionally, stress histories of both tubes are discussed based upon their elasto-plastic stress behavior under plane stress condition.
Highlights Deep concrete filled double skin circular tubular beams under shear are provided. Effects of inner-to-outer diameter ratios on shear capacities are investigated. Methods to predict shear capacities of deep CFDST beam are proposed. Stress histories of both tubes are discussed based upon elasto-plastic stress.
Concrete filled double skin circular tubular beams with large diameter-to-thickness ratio under shear
Abstract Concrete filled double skin circular tubular (CFDST) members consist of double concentric circular steel tubes with concrete sandwiched between them. Having hollow cross-section, CFDST members are lighter than ordinary concrete filled steel tubular (CFT) members, which have solid cross-sections. Therefore, by alleviating seismic force against the foundation during earthquake, CFDST members can be effectively applied to seismic resistant structures such as a high raise bridge pier. The present study aims to investigate shear characteristics of deep CFDST beams experimentally through an asymmetric static four-point loading test. Two main parameters were selected, namely, the diameter-to-thickness and the inner-to-outer diameter ratios. The results showed that the shear resistance of CFDST gradually decreased as inner-to-outer diameter ratio increased. Methods to predict the shear resistance of deep CFDST beams are also provided. Additionally, stress histories of both tubes are discussed based upon their elasto-plastic stress behavior under plane stress condition.
Highlights Deep concrete filled double skin circular tubular beams under shear are provided. Effects of inner-to-outer diameter ratios on shear capacities are investigated. Methods to predict shear capacities of deep CFDST beam are proposed. Stress histories of both tubes are discussed based upon elasto-plastic stress.
Concrete filled double skin circular tubular beams with large diameter-to-thickness ratio under shear
Uenaka, Kojiro (author)
Thin-Walled Structures ; 70 ; 33-38
2013-04-16
6 pages
Article (Journal)
Electronic Resource
English
Mechanical behavior of concrete filled double skin tubular circular deep beams
| Online Contents | 2011