|
Steel box section bridge piers are lightweight , small footprint , short construction period , reinforcing the advantages can not be replaced by reinforced concrete pier reinforcement easy , attractive appearance , and has been widely used in Japan , the United States , Germany and other developed economies . The Great Hanshin Earthquake in 1995 , a large part of the steel box section bridge piers due to local buckling pier bottom damage , repair and reinforcement of steel box section bridge piers disaster has become the focus of people 's studies . Domestic and foreign scholars have proposed a variety of steel box section bridge piers reinforced , partially filled concrete reinforcement method is currently the most widely used one . In this paper, on the basis of previous studies from theory further analysis of the reinforcing effect of the seismic performance of steel box section bridge piers and partially filled concrete reinforcement method . Based on the basic theory of the finite element method , the constitutive relation of the material , based on a finite element model of the steel box section bridge piers , steel box section bridge piers specimen nonlinear buckling analysis . Relative slenderness ratio , steel plate generalized thickness ratio , concrete strength factors bearing capacity and ductility of steel bridge pier . Combined with others in the past research , this paper proposes a steel box section bridge piers reinforcing appropriate fill rate . The results show that concrete suitable filling rate should be between 15% -25% . Fill rate of the steel box section bridge piers and suitable concrete the reinforced piers specimen analysis of the hysteretic behavior under cyclic loading . The analysis showed that , compared with the steel box section bridge piers , significantly improved seismic performance of the part within concrete filled steel box section bridge piers .
|