关键词: 钢筋混凝土方柱;混凝土帆布;CFRP加固;轴心受压;截面尺寸

Abstract: The specimen section size has an important influence on the performance of carbon fiber reinforced polymer(CFRP)confined columns.Due to the CFRP durability in the special environment of the problem.Therefore, the method of united reinforcement of carbon fiber and concrete canvas is put forward, and the axial compression tests of rectangular reinforced concrete square columns with two reinforcement schemes(CFRP reinforcement, concrete canvas and CFRP together reinforcement)were carried out.The influence of different section sizes on the axial bearing capacity of concrete square columns is analyzed, and the failure modes and ductility of reinforced concrete square columns are analyzed.The test results show that with the increase of the size of column, the specimen loading platform becomes small,section stress,strain and ductility coefficient were decreased,but compared with the CFRP group column reinforcement,bearing capacity and ductility of CC +CFRP reinforced composite were improved,and failure mode is improved.

Key words: reinforced concrete square column;concrete canvas;CFRP reinforce;axial compression;section size