Compressive behavior of concrete columns strengthened with BFRP textile reinforced ECC
To study the axial compression performance of BFRP(basalt fiber reinforced polymer)reinforced ECC(engineered cementitious composites)composite reinforced concrete columns,BFRP-ECC and BFRP-mortar reinforced concrete columns were tested under axial compression,and the damage mode,bearing capacity and deformation ability of BFRP-grid reinforced ECC reinforced concrete column were analyzed.The finite element software ABAQUS was used to established finite element models of BFRP-matrix reinforced columns,and the accuracy of finite element modeling was verified by comparing simulation results with experimental results.Meanwhile,finite element models of BFRP-ECC reinforced damaged columns were established,considering the effect of initial damage on core concrete columns,and the stress characteristics and failure modes of various components of BFRP-ECC reinforced damaged concrete columns were obtained.The results showed that the bearing capacity and deformation capacity of concrete columns strengthened with cement matrix reinforced with BFRP grid can be significantly improved,and the effect was better when the ECC was used as matrix.The failure of BFRP-ECC reinforced concrete column possessed ductility characteristics and uniform plastic deformation distribution of the core area.The initial damage of the core column has little effect on the failure mode of BFRP-ECC composite reinforced concrete columns,and the ECC and BFRP grid still show good deformation coordination ability.
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