FRp-钢复合管约束混凝土方柱抗震能研究-土木工程、结构工程专业毕业论文.docx

FRP-钢复合管约束混凝土方柱抗震性能————————————————————————————————————————————————————一●_一●__ FRP-钢复合管约束混凝土方柱抗震性能 ————————————————————————————————————————————————————一●_一●__ Abstract A new type of Fiber Reinforced Polymer(FRP)-steel composite tube confined RC(SRC) columns was proposed in the paper by combining corrosion．resistant FRP material with steel tube confined RC(SRC)columns to solve the problems of local buckling and poor durability in concrete-filled steel tube column．Experimental study and theoretical analysis of the proposed new columns were conducted．The main works of this Paper is follows as： (1)The behavior of FI己P．STEEL composite tube confined RC columns was studied by testing three GFI冲-STEEL composite tube confined RC columns．one CFI冲．STEEL composite tube confined RC columns，one steel composite tube confined RC column and one RC column．The test parameters Was the layer number of GFRP(6 layers or 8 layers)，fiber types(GFRP or CFRP)and ratio of axial load(0．3 or 0．45)．The test results indicated that steel tube and core concrete were restrained by GFRP(CFRP)，and the beating capacity,ductility and energy dissipation of FRP-STEEL composite tube confined RC columns were improved by the effective restraining of GFRP(CFRP)．With t11e increase in ratio of axial load，the improving on the beating capacity Was more obvious and the ductility was worse． (2)The behavior of FRP．STEEL composite tube confined SRC columns was studied by testing two FRP-STEEL composite tube confined SRC columns and one steel composite tube confined SRC column．The test parameters Was the layer number of GFRP(6 layers or 8 layers)．The test results indicated that steel tube and core concrete were restrained by GFRP，and the be撕ng capacity,ductility and energy dissipation of FRP-STEEL composite tube confined SRC columns were improved by the effective restraining of GFRP．With the increase in the layer number of GFRP, the improving on the bearing capacity,ductility and energy dissipation of FRP-STEEL composi