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An Experimental Behavior of Lightweight Aggregate Concrete Filled Steel Tubular Stub under Axial Compression
Base on the compressive tests of 24 lightweight aggregate concrete filled steel tubular (LACFST) stub under axially load, force-longitudinal strain curves, macroscopically characters of deformation, failure mode and the influence of parameters were studied. And different parameters, containing steel ratio, steel strength and concrete strength were considered. The test results demonstrate that confinement coefficient is a significant parameter to the mechanical properties of LACFST. With a small confining ratio, it has a decrease trend in later period and failure mode is drum-shaped type. Otherwise, the failure mode is shear type. Because of confinement, strength of core lightweight aggregate concrete (LAC) increases, and stiffness of LACFST is about 20% larger than the sum value of LAC stiffness and steel tube stiffness. Based on test considering the increase of LAC strength, calculation method of bearing capacity and its simplified method are proposed. Compare to other methods, its results are closer to the test ones.
An Experimental Behavior of Lightweight Aggregate Concrete Filled Steel Tubular Stub under Axial Compression
Base on the compressive tests of 24 lightweight aggregate concrete filled steel tubular (LACFST) stub under axially load, force-longitudinal strain curves, macroscopically characters of deformation, failure mode and the influence of parameters were studied. And different parameters, containing steel ratio, steel strength and concrete strength were considered. The test results demonstrate that confinement coefficient is a significant parameter to the mechanical properties of LACFST. With a small confining ratio, it has a decrease trend in later period and failure mode is drum-shaped type. Otherwise, the failure mode is shear type. Because of confinement, strength of core lightweight aggregate concrete (LAC) increases, and stiffness of LACFST is about 20% larger than the sum value of LAC stiffness and steel tube stiffness. Based on test considering the increase of LAC strength, calculation method of bearing capacity and its simplified method are proposed. Compare to other methods, its results are closer to the test ones.
An Experimental Behavior of Lightweight Aggregate Concrete Filled Steel Tubular Stub under Axial Compression
Zhongqiu, Fu (author) / Bohai, Ji (author) / Yu, Zhou (author) / Xiaoliang, Wang (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
2011-05-16
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2011