Of Hrb500 Grade Rc Eccentrically By The Numerical Analysis Of Force Performance

The standard value of HRB500 steel bar's tensile strength is 500MPa. It is a new type steel bar which has many merits, such as hi-strength and strong ductility. This kind of steel bar has been used prevalently in foreign countries. But it hasn't been taken in by new Code for design of concrete structures (GB50010-2002).In order to take the internationalization into reality as soon as possible and popularize this new kind of steel bar in engineering area of our country, the experiment researches should be done on the main characteristic of HRB500 reinforced flexural members.In this paper, numerical analysis of the whole process is used. The simulation experiment is carried out to 81 HRB500 reinforced eccentric loading columns by changing the parameters, such as concrete strength, slenderness ratio, eccentricity ratio, reinforcement ratio. The analysis is done on the main characteristic of HRB500 reinforced eccentric loading members by using the calculation results. Then the results of the numerical analysis are compared with the calculation results according to the present code, which indicates that the suggestion results of this article are reliable and feasible.The experiment research shows that the performance of HRB500 reinforced eccentric loading members is the same as that of the common reinforced concrete members. It's bearing capacity of eccentric loading members can be calculated by the formula of cross-section in the Code for design of concrete structure (GB50010-2002). The result shows that the HRB500 reinforced concrete member is safe enough. And I propose f_y = f_yk/γ_f =500/1.1≌450Mpa.This subject is the program of National natural science fund (50578148).