Friction type retrofitting device for steel tower structures

Abstract

Disclosed herein is a friction type retrofitting device for steel tower structures. The retrofitting device includes a coupling part which couples an outer column and an inner column of a post of a steel tower to each other using an angle bracket and a bolt. A slot is formed in a portion of the outer column to which the coupling part is coupled. A friction plate is provided to contact an outer circumferential surface of the slot. Thereby, wind energy transmitted to the steel tower is attenuated by friction between the outer circumferential surface of the slot of the coupling part and the friction plate.

1 . A friction type retrofitting device for steel tower structures, comprising:
 a coupling part coupling an outer column and an inner column of a post of a steel tower to each other using an angle bracket and a bolt;   a slot formed in a portion of the outer column to which the coupling part is coupled; and   a friction plate provided to contact an outer circumferential surface of the slot,   wherein wind energy transmitted to the steel tower is attenuated by friction between the outer circumferential surface of the slot and the friction plate of the coupling part.   
   
   
       2 . The friction type retrofitting device as set forth in  claim 1 , wherein a horizontal section of the post has a cross shape, and a horizontal section of each of the outer column and the inner column has an L shape. 
   
   
       3 . The friction type retrofitting device as set forth in  claim 1  wherein a plurality of coupling parts having the slot in the outer column is provided on the post, the friction plate being provided on one of the coupling parts. 
   
   
       4 . The friction type retrofitting device as set forth in  claim 2  wherein a plurality of coupling parts having the slot in the outer column is provided on the post, the friction plate being provided on one of the coupling parts. 
   
   
       5 . The friction type retrofitting device as set forth in  claim 3 , wherein a reinforcing plate is provided on a portion of the outer column to which the coupling part is coupled. 
   
   
       6 . A friction type retrofitting device for steel tower structures, comprising:
 an outer column arranged to be parallel to an inner column, thus providing a post of a steel tower, and divided at a predetermined position into two portions;   a slot formed in one of the divided portions; and   a friction plate provided to contact an outer circumferential surface of the slot,   wherein wind energy transmitted to the steel tower is attenuated by friction between the outer circumferential surface of the slot and the friction plate.   
   
   
       7 . The friction type retrofitting device as set forth in  claim 5 , wherein a horizontal section of the post has a cross shape, and a horizontal section of each of the outer column and the inner column has an L shape. 
   
   
       8 . The friction type retrofitting device as set forth in  claim 5  wherein a plurality of coupling parts is provided to couple the outer column to the inner column using an angle bracket and a bolt, with a slot formed in a portion of the outer column to which the coupling part is coupled. 
   
   
       9 . The friction type retrofitting device as set forth in  claim 6  wherein a plurality of coupling parts is provided to couple the outer column to the inner column using an angle bracket and a bolt, with a slot formed in a portion of the outer column to which the coupling part is coupled.