Anchoring device and prestressed concrete

Abstract

An anchoring device includes a barrel member which is composed of resin or mortar and has a through hole in a tapered shape, multiple wedge members which each have an outer peripheral surface having a tapered shape and slidably contacting an inner peripheral surface of the through hole and which cooperate with each other to grip a wire, and fibers as a reinforcement member extending in a circumferential direction of the barrel member to suppress the diameter expansion deformation of the barrel member.

1 . An anchoring device for an end of a wire, comprising:
 a barrel member which is composed of resin or mortar and has a through hole having a tapered shape;   multiple wedge members which each have an outer peripheral surface having a tapered shape and slidably contacting an inner peripheral surface of the through hole and which cooperate with each other to grip the wire; and   a reinforcement member including a part that extends in a circumferential direction of the barrel member.   
     
     
         2 . The anchoring device according to  claim 1 , wherein each wedge member is composed of resin or fiber reinforced resin. 
     
     
         3 . The anchoring device according to  claim 1 , wherein the reinforcement member comprises fibers embedded in the barrel member. 
     
     
         4 . The anchoring device according to  claim 1 , wherein the barrel member is composed of a prepreg wound cylindrically so as to have an outer peripheral surface tapered in steps in a direction same as that of the tapered shape of the through hole,
 the prepreg comprises a base material made of resin and fibers impregnated in the base material, and   the reinforcement member is composed of the fibers comprised in the prepreg.   
     
     
         5 . The anchoring device according to  claim 4 , wherein the prepreg is composed of multiple strip-shaped bodies disposed to overlap with each other in a radial direction at parts in an axial direction of the through hole. 
     
     
         6 . The anchoring device according to  claim 1 , wherein the reinforcement member comprises an annular body provided on an outer circumference of the barrel member to surround the barrel member. 
     
     
         7 . The anchoring device according to  claim 6 , wherein the barrel member is composed of fiber reinforced resin, and
 the annular body is composed of fiber reinforced resin having a higher Young's modulus than the fiber reinforced resin composing the barrel member.   
     
     
         8 . The anchoring device according to  claim 6 , wherein the annular body is provided partially in an axial direction of the through hole. 
     
     
         9 . The anchoring device according to  claim 6 , wherein the annular body is provided continuously over an entirety in an axial direction of the through hole. 
     
     
         10 . The anchoring device according to  claim 1 , wherein the barrel member has an outer peripheral surface having a cylindrical shape, and
 the reinforcement member comprises a spiral restraint body wound on the outer peripheral surface of the barrel member.   
     
     
         11 . The anchoring device according to  claim 10 , wherein the barrel member is composed of fiber reinforced resin, and
 the spiral restraint body is composed of fiber reinforced resin having a higher Young's modulus than the fiber reinforced resin composing the barrel member.   
     
     
         12 . The anchoring device according to  claim 10 , wherein the barrel member has a spiral groove on the outer peripheral surface, and
 the spiral restraint body is fitted in the spiral groove.   
     
     
         13 . The anchoring device according to  claim 1 , wherein the barrel member has an outer peripheral surface having a conical shape, and
 the reinforcement member comprises an annular restraint body fitted on the outer peripheral surface of the barrel member.   
     
     
         14 . The anchoring device according to  claim 13 , wherein the barrel member is composed of fiber reinforced resin, and
 the annular restraint body is composed of fiber reinforced resin having a higher Young's modulus than the fiber reinforced resin composing the barrel member.   
     
     
         15 . The anchoring device according to  claim 13 , wherein an end surface of the annular restraint body on a tapered side of the conical shape of the barrel member includes a surface perpendicular to an axial direction of the barrel member. 
     
     
         16 . A prestressed concrete, comprising:
 a concrete block having a rectangular parallelepiped shape;   a wire penetrating in a longitudinal direction of the concrete block; and   the anchoring device according to  claim 1  which is provided at each of two end portions of the concrete block in the longitudinal direction and to which an end portion of the wire is locked.   
     
     
         17 . The prestressed concrete according to  claim 16 , wherein the anchoring device is embedded in the concrete block. 
     
     
         18 . The prestressed concrete according to  claim 16 , wherein the anchoring device is mounted to the concrete block such that one end surface of the barrel member contacts an end surface of the concrete block and an outer peripheral surface of the barrel member is exposed to outside.