Carbon fiber reinforced polymer (cfrp) strengthening system with reinforcement and cathodic protection functions for steel bridge

Abstract

Provided is a carbon fiber reinforced polymer (CFRP) strengthening system with reinforcement and cathodic protection functions for a steel bridge. The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge includes a steel beam component, a CFRP plate, clamping plate assemblies, water swellable cotton, insulating friction plates, a current stabilized power source, and a connecting lead, where the CFRP plate is provided below a lower surface of the steel beam component; clamping plate assemblies are respectively detachably connected to two ends of the steel beam component; the insulating friction plate is provided between the clamping plate assembly and a clamping contact surface of the CFRP plate; the water swellable cotton is provided between the CFRP plate and the lower surface of the steel beam component; and the current stabilized power source is provided beneath the steel beam component.

What is claimed is: 
     
         1 . A carbon fiber reinforced polymer (CFRP) strengthening system with reinforcement and cathodic protection functions for a steel bridge, comprising a steel beam component, a CFRP plate, clamping plate assemblies, water swellable cotton, insulating friction plates, a current stabilized power source, and a connecting lead, wherein the CFRP plate is provided below a lower surface of the steel beam component; clamping plate assemblies are respectively detachably connected to two ends of the steel beam component; two ends of the CFRP plate are respectively located in the clamping plate assemblies at the two ends of the steel beam component; the insulating friction plate is provided between the clamping plate assembly and a clamping contact surface of the CFRP plate; the water swellable cotton is provided between the CFRP plate and the lower surface of the steel beam component; the water swellable cotton comes in contact with the CFRP plate and the lower surface of the steel beam component; the current stabilized power source is provided beneath the steel beam component; and the current stabilized power source comprises a positive electrode connected to one end of the CFRP plate through the lead, and a negative electrode connected through the lead to an end of the steel beam component away from the one end of the CFRP plate connected to the lead. 
     
     
         2 . The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge according to  claim 1 , wherein the clamping plate assembly comprises a U-shaped lower clamping plate; rectangular upper clamping plates are respectively provided at two ends of the U-shaped lower clamping plate; the rectangular upper clamping plate comprises one end overlapping on the end of the U-shaped lower clamping plate, and the other end acting on the steel beam component; a portion of the rectangular upper clamping plate close to the end of the U-shaped lower clamping plate is provided with at least one bolt; the bolt penetrates through the rectangular upper clamping plate and the U-shaped lower clamping plate; and a threaded end of the bolt is provided with a nut in threaded connection with the bolt. 
     
     
         3 . The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge according to  claim 1 , wherein the current stabilized power source comprises at least one storage battery; a plurality of solar panels are provided on the steel beam component; and the solar panels are electrically connected to the storage battery. 
     
     
         4 . The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge according to  claim 3 , wherein the current stabilized power source is provided beneath the steel beam component; and a waterproof assembly is provided on an outer surface of the current stabilized power source. 
     
     
         5 . The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge according to  claim 1 , wherein at least one end of the CFRP plate is provided with a tensioning device; a surface of the tensioning device is detachably connected to the steel beam component; and an output end of the tensioning device is detachably connected to one end of the CFRP plate. 
     
     
         6 . The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge according to  claim 1 , wherein a portion of the end of the CFRP plate close to the clamping plate assembly is provided with a prestress compensation assembly; the prestress compensation assembly comprises a U-shaped mounting frame; two ends of the U-shaped mounting frame are fixedly connected to an edge of the lower surface of the steel beam component in a width direction; a U-shaped connecting frame is provided in the U-shaped mounting frame; a pulling rod is provided in the U-shaped connecting frame; two ends of the pulling rod are respectively fixed at two sides of the U-shaped connecting frame; the pulling rod comes in contact with an upper surface of the CFRP plate; a plurality of uniformly distributed linear motors are provided at an outer side of a closed end of the U-shaped mounting frame; a housing of each of the linear motors is fixed on the U-shaped mounting frame; an output end of the linear motor is fixed on the U-shaped connecting frame; a force sensor is provided on the CFRP plate; both the force sensor and the linear motor are electrically connected to the current stabilized power source; and the force sensor is configured to control working time and a working state of the linear motor. 
     
     
         7 . The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge according to  claim 6 , wherein limiting rods are further symmetrically provided in the U-shaped mounting frame; the limiting rods are respectively fixed at two sides of the U-shaped mounting frame; and the limiting rods are provided along a length direction of the U-shaped mounting frame, and come in contact with a lower surface of the CFRP plate. 
     
     
         8 . The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge according to  claim 6 , wherein chutes are respectively formed in middles of two sides of the U-shaped mounting frame; and the two ends of the U-shaped connecting frame are respectively located in the chutes.