The Research On The Experiment That With The Reinforced Concrete Of Titanium And Blast Furnace Slag Beams Strengthened With CFRP Which Have Different Damage

In recent years, along with manufacturing technology innovation, application of theoretical and experimental research unceasingly thorough on FRP material between the world developed country and our country, FRP material is used more and more widely in the field of civil engineering. Especially in some engineering field which call for corrosion resistance, low temperature resistance, corrosion resistance and other special requirements, application of FRP material is with broad prospects for development. In modern engineering, the application of FRP is mainly base on strengthening concrete structure. The study that applying the CFRP bar as tensile reinforcement directly or partly instead of steel bar in the component of blast furnace slag concrete structurehas practical engineering significance to study. The current research in this area is still a blank.This article uses the method of comparative experiments.Through respectively arranged 6 high titanium blast furnace slag concrete beams identical in length and cross section size with steel and high strength carbon fiber rods as beam main tensile reinforcement for transverse contrast. Using the design loads taken as 100 KN, 150 KNand 200KN for vertical comparison. Through the experiment we found that, the normal section flexural performance of the high titanium blast furnace slag reinforced beam can completely satisfy the current "concrete structure design principle"(GB 50010-2011) theory calculation, and has more than 30% surplus. It further validates the method by using blast furnace slag instead of ordinary concrete aggregate in the structure is feasible. The flexural performance is mainly brittle failure to allocate carbon fiber rod as main reinforcement of high blast furnace slag concrete beams. Its performance slightly drop, Mainly manifested in the following two aspects: 1) the failure load in addition to LM1-D beam can meet the design requirements, the remaining two beams failure load respectively to meet the design load of 99% and 95%. 2) the crack on the beam development significantly faster, and the width of the crack is larger, whendestroyed,the crack of the beam are about 1.4mm.Aiming at the problem of ultra wide cracks. This paper carried out on the beam side increased waist reinforcement ways to limit the crack. we make theoretical analysis and calculation. The experimental results show that the method can effectively inhibit the development of cracks and reduce the deflection of the cross, can meet the requirements of design and use.