Truss-type shear reinforcement material having double anchorage functions at both top and bottom thereof

Abstract

The present invention relates to a shear reinforcement material of a reinforced concrete structure, which is installed in a reinforced concrete structure to increase resistance against shear failure. The truss-type shear reinforcement material having double anchorage functions at both top and bottom thereof is configured by installing double anchor heads on the top and the bottom of a truss ( 20 ), which is formed by connecting an upper member ( 24 ) with a lower member ( 26 ) through connection members ( 21 ) such as vertical members ( 22 ) or inclined members ( 23 ). Therefore, the shear reinforcement material according to the present invention can improve shear resistance, shear reinforcement and ductility, because upper anchor heads ( 34 ) and the upper member ( 24 ) carry out a double anchorage function on the top while lower anchor heads ( 44 ) and the lower member ( 26 ) carry out a double anchorage function on the bottom, and furthermore, improves construction quality as building a concrete structure becomes more convenient.

1 . A truss-type shear reinforcement device having double anchorage functions at upper and lower sides thereof, which is installed in a reinforced concrete structure to increase resistance against shear failure, wherein the truss-type shear reinforcement device comprises:
 a truss including an upper chord member, a lower chord member, and one or more connection members for interconnecting the upper chord member and the lower chord member;   one or more upper anchor heads fixedly connected with the upper chord member of the truss at the upper side of the truss; and   one or more lower anchor heads fixedly connected with the lower chord member of the truss at the lower side of the truss.   
     
     
         2 . The truss-type shear reinforcement device according to  claim 1 , wherein each of the connection members comprises any one of a vertical member and a diagonal member, wherein the vertical member is formed at an upper portion thereof with an upper panel point where the upper chord member and the vertical member are joined to each other, and are formed at a lower portion thereof with a lower panel point where the lower chord member and the vertical member are joined to each other, in such a fashion that the upper panel point and the lower panel point of the vertical member are vertically aligned, and wherein the diagonal member is formed at an upper portion thereof with an upper panel point where the upper chord member and the diagonal member are joined to each other, and are formed at a lower portion thereof with a lower panel point where the lower chord member and the diagonal member are joined to each other, in such a fashion that the upper panel point and the lower panel point of the diagonal member are diagonally aligned. 
     
     
         3 . The truss-type shear reinforcement device according to  claim 2 , wherein each of the connection members comprises an upper spacer protrudingly extending upwardly from the top of the upper chord member by a predetermined distance, and a lower spacer protrudingly extending downwardly from the bottom of the lower chord member by a predetermined distance, wherein each of the upper anchor heads is joined to the upper spacer so that it is installed spaced apart by the predetermined distance from the upper chord member, and wherein each of the lower anchor heads is joined to the lower spacer so that it is installed spaced apart by the predetermined distance from the lower chord member. 
     
     
         4 . The truss-type shear reinforcement device according to  claim 2 , wherein each of the upper anchor heads is installed spaced apart by the predetermined distance from the upper chord member by the upper spacer fixed at a lower side thereof to the upper chord member and fixed at an upper side thereof to the upper anchor head, and wherein each of the lower anchor heads is installed spaced apart by the predetermined distance from the lower chord member by the lower spacer fixed at an upper side thereof to the lower chord member and fixed at a lower side thereof to the lower anchor head. 
     
     
         5 . The truss-type shear reinforcement device according to  claim 4 , wherein the upper spacer is fixed to the upper panel point where the upper chord member and the connection member are joined to each other, and the lower spacer is fixed to the lower panel point where lower chord member and the connection member are joined to each other. 
     
     
         6 . The truss-type shear reinforcement device according to  claim 3  wherein the horizontal cross-sectional area of each of the upper anchor heads is formed to be equal to 7-14 times that of the upper spacer, and wherein the horizontal cross-sectional area of each of the lower anchor heads is formed to be equal to 7-14 times that of the lower spacer. 
     
     
         7 . The truss-type shear reinforcement device according to  claim 4  wherein the horizontal cross-sectional area of each of the upper anchor heads is formed to be equal to 7-14 times that of the upper spacer, and wherein the horizontal cross-sectional area of each of the lower anchor heads is formed to be equal to 7-14 times that of the lower spacer. 
     
     
         8 . The truss-type shear reinforcement device according to  claim 5  wherein the horizontal cross-sectional area of each of the upper anchor heads is formed to be equal to 7-14 times that of the upper spacer, and wherein the horizontal cross-sectional area of each of the lower anchor heads is formed to be equal to 7-14 times that of the lower spacer.