Bearing Capacity of Frame’s Column Strengthened with Addition Flange Wall

Abstract

A large number of frames damaged due to the poor lateral stiffness in “5.12” earthquake. Additonal flange wall could effectively improve the lateral stiffness. This paper analyzed the behavior capability of special-shaped column of the practical engineering structures, meanwhile, obtained N-M curve, Mx-My curve and M-φ of biaxial eccentricity compression based on numerical integration method.The results show that,the failure mode of special section column after reinforcing and rectangular column under the biaxial eccentricity compression are conform,including fail in tension or compression and the limit failure. When the axial compression ratio is quite slightly,and section eccentric tension destruction, the thrust increases, the anti-bending ability increases.When section bearing destruction, along with axle strength enlargement, the anti-bending ability reduces.And the results reveal the axial compression ratio could influence the bearing capacity and ductility of frame’s column obviously.

Study on Bearing Capacity of Reinforced Concrete Columns Strengthened by Adding Wing Walls

“…A large number of reinforced concrete columns were damaged due to poor bending stiffness in Wenchuan Earthquake [1], methods which can effectively improve the stiffness of columns are generally used in the repair and reinforcement projects [2].…”