|
The civil engineering and construction in China is now in a period of both new and repair and reinforcement , fiber reinforced composite material (Fiber Reinforced Polymer, hereinafter referred to as FRP ) reinforcement structure has incomparable advantages of traditional reinforcement methods , structural reinforcement now a hot research . FRP reinforced concrete cylinder , can significantly improve the concrete compressive strength and ductility , and related research has been more mature , in this article the main stress the FRP reinforcement rectangular concrete columns . First , on the basis of a large number of access to domestic and international public literature , summarized research overview summarizes the FRP reinforcement has collected a 188 the FRP reinforcement rectangular column test data to establish the corresponding database . By induction typical FRP confined circular and rectangular concrete columns of the model , the squared error and evaluated as an indicator of the existing formula FRP confined rectangular columns . Further , on the basis of previous studies , combined with a database spreadsheet , improved the strength of FRP confined rectangular columns formula to get better results . Take advantage of the improved formula , were discussed in length than the edge of the rectangular columns and chamfer size of FRP confined rectangular concrete columns effect , and drawn the impact curve ; addition , this paper also attempts to FRP equivalent thickness , combined with the the Mander model discussed considering reinforced the role of FRP reinforced concrete rectangular columns , the strength formula is derived , and verified by experimental data in the literature . We collect test data from several different , due to the experimental conditions , different equipment , as well as access to the different material properties led to the evaluation results have a certain degree of error , For more accurate results required under uniform conditions test , to do a lot of different factors for FRP confined rectangular column efficiency , and the establishment of a database to be evaluated .
|