STUDY OF THE SECTIONAL SIZE EFFECTS OF AXIAL COMPRESSION PERFORMANCE OF CONFINED CONCRETE SHORT COLUMNS WITH BFRP SHEETS

Abstract

Abstract: In order to study the axial compression performance, five different section height to width ratio of confined concrete rectangular short columns with BFRP sheets were characterized by axial compressive test. According to section height to width ratio and the layers of BFRP sheets, all specimens were divided into 15 groups, and every group has 3 specimens. The axial compressive strength, peak strain and stress-strain relationship of all specimens were also investigated by the theoretical analysis and numerical simulation. The results indicate that crack development and damage morphology are basically the same in each group. For the axial compressive strength of the specimens in each group, there is an obvious cross-sectional size effect. With the changes of specimen cross-sectional aspect ratio, peak strain is relatively discrete. The strength model agrees well with the experimental results. And the axial compressive strength of confined concrete short column can be well simulated by using ANSYS finite element analysis software.

Key words: section height to width ratio, size effect, axial compressive strength, peak strain, numerical simulation

CLC Number:

TB332

LIU Hua-xin, SUN Ying-ming, WANG Xue-zhi, XING Xian-cai. STUDY OF THE SECTIONAL SIZE EFFECTS OF AXIAL COMPRESSION PERFORMANCE OF CONFINED CONCRETE SHORT COLUMNS WITH BFRP SHEETS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(10): 21-26.

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