Hydraulic jack systems to be installed to the outrigger to perimeter column joints to automatically adjust differential column shortening and provide additional structural damping

Abstract

Disclosed is a novel connection structure of an outrigger and a perimeter column. The connection structure has a function of automatically absorbing differential column shortening which is occurred between the core wall and the perimeter column during or after the construction of a building, thereby preventing excessive stress due to the differential column shortening. In addition, the invented apparatus also functions as damper by providing additional damping to the structure to resist dynamic loading such as wind and earthquake efficiently.

1 . A connection structure of a perimeter column of a building and an outrigger connected to a core wall, comprising:
 an apparatus provided between the perimeter column and the end of the outrigger to be extended or contracted in accordance with displacement of an end of the outrigger;   wherein the apparatus absorbs the vertical displacement of the end of the outrigger caused by a differential column shortening between the perimeter column and the core wall, thereby preventing extra stress from occurring and the apparatus also functions as damper by providing additional damping to the structure to resist dynamic loading such as wind and earthquake efficiently.   
   
   
       2 . The connection structure according to  claim 1 , wherein the apparatus comprises hydraulic cylinders that are provided to upper and lower parts of the outrigger end, respectively; and
 wherein when one hydraulic cylinder is pressurized and then the increased pressure is gradually transferred to the other hydraulic cylinder. The hydraulic cylinder that receives the transferred pressure is to be extended.   
   
   
       3 . The connection structure according to  claim 2 , wherein the hydraulic cylinders are connected to each other by an orifice apparatus that enables fluid to flow from the one hydraulic cylinder to the other hydraulic cylinder. 
   
   
       4 . The connection structure according to  claim 2 , wherein the apparatus comprises a hydraulic cylinder with an orifice integrated in the interior of the cylinder. 
   
   
       5 . The connection structure according to  claim 4 , wherein the hydraulic cylinder integrated in the interior of the cylinder is provided to only one of the upper or lower parts of the outrigger end. 
   
   
       6 . The connection structure according to  claim 1 , wherein the end of the outrigger is connected to the apparatus by hinges. 
   
   
       7 . The connection structure according to  claim 1 , further comprising a lock nut that prevents an end of the apparatus from being excessively pressurized. 
   
   
       8 . The connection structure according to  claim 1 , wherein a horizontal force transfer apparatus is provided at a gap between outer end face of the outrigger end and the perimeter column, thereby transferring horizontal force occurring between the perimeter column and the core wall. 
   
   
       9 . The connection structure according to  claim 8 , wherein a roller or sliding plate is used as the horizontal force transfer apparatus.