Experimental Research of Uniaxial Compression Bearing Capacity on Large Diameter CFST Columns

Abstract:

This paper focused on the uniaxial ultimate-bearing-capacity of large size concrete filled steel tubular (CFST) columns. Two aspects were investigated experimentally. To verify the feasibility of similarity principles for large size components, a series of uniaxial compressive experiments were conducted using different scaled specimens, the prototype of which is a CFST arch rib in an authentic arch bridge. Meanwhile, two specimens with same scale were tested axially and eccentrically to investigate the difference of bearing capacity resulted from the pierced-column. The experimental results show that the size effect on the bearing capacity of the rib is so insignificant that the scaled specimen can be used to obtain the maximum capacity of the full-scale component. The inserted steel tubes in the middle of the column cause the reduction of its capacity and the reduction factor from axial loading is bigger than that from bias load. Moreover, the eccentricity reduces the effect of piercing on the capacity of CFST column.

• Periodical: Key Engineering Materials (Volume 540)
• Pages: 107-118
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.540.107
• Online since: January 2013
• Authors: Xiao Qiang Ren, Yan Jiang Chen, Wei Ming Yan, Da Peng Gu, Jin Jie Wang
• Keywords: Bearing Capacity, Concrete Filled Steel Tubular (CFST) Columns, Large Diameter Columns, Uniaxial Compression

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