EXPERIMANTAL STUDY ON COMPRESSION PERFORMANCE OF CONCRETE-ENCASED FRP CONFINED CONCRETE SUB-COLUMNS/CORES COLUMNS WITH WEAK CONFINE

Abstract

Abstract: A novel column named concrete-encased FRP confined concrete sub-columns/cores column (CEFC) consisting of steel rebar, concrete and fiber-reinforced polymer (FRP) tube is presented. The sectional form of CEFC consists of the outer common reinforced columns (RC) and 4 inner Concrete-Filled FRP Tubes (CFFT), which located near 4 corners of square CEFC. The compression performance of RC and CEFC were studied and compared through experiment and Finite Element Method (FEM). The result indicates that the typical failure mode of CEFC with weak confine was local crushing and overall damage of CEFC was prevented by CFFT. What′s more, ductility of CEFC was improved. Moreover, second order stiffness and enhancement of strength were observed when CEFC was under eccentric compression.

Key words: FRP tube, FRP confined concrete cores column, composites columns, ductility, failure mode

CLC Number:

TB332

SUN Yun-lou, QI Yu-jun, LIU Wei-qing. EXPERIMANTAL STUDY ON COMPRESSION PERFORMANCE OF CONCRETE-ENCASED FRP CONFINED CONCRETE SUB-COLUMNS/CORES COLUMNS WITH WEAK CONFINE[J]. Fiber Reinforced Plastics/Composites, 2016, 0(9): 17-25.

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