Earthquake-resistant flat expansion joint using hinge

Abstract

An earthquake-resistant flat expansion joint using a hinge is provided which includes an expansion joint main body disposed between opposite ends of deck slabs of a bridge or an elevated road, hinged to one side of the deck slab at its one end to enable behavior in X, Y and Z-axis directions, and expanded or shrunk depending on temperature variation and vibrations due to earthquakes to be moved in the X, Y and Z-axis directions, an expansion/shrinkage member connected to one end of the expansion joint main body to accommodate the behavior in X, Y and Z-axis directions due to expansion and shrinkage of the expansion joint main body caused by temperature variation and occurrence of the earthquakes, a hinge shaft support member installed at one end of the deck slab to support a lower part and side parts of a hinge shaft part of the expansion joint main body, an expansion joint support member installed at one end of the other deck slab to support lower parts of an expansion part of the expansion joint main body and the expansion/shrinkage member, anchor bolts for fixing the hinge shaft support member and the expansion joint support member to the opposite deck slabs, and a rubber seal disposed under the expansion joint main body and detachably installed at a space between both opposite ends of the deck slabs to collect rainwater and foreign substances.

1 . An earthquake-resistant flat expansion joint using a hinge comprising:
 an expansion joint main body  210  disposed between opposite ends of deck slabs of a bridge or an elevated road, hinged to one side of the deck slab at its one end to enable behavior in X, Y and Z-axis directions, and expanded or shrunk depending on temperature variation and vibrations due to earthquakes to be moved in the X, Y and Z-axis directions;   an expansion/shrinkage member  220  connected to one end of the expansion joint main body  210  to accommodate the behavior in X, Y and Z-axis directions due to expansion and shrinkage of the expansion joint main body  210  caused by temperature variation and occurrence of the earthquakes;   a hinge shaft support member  230  installed at one end of the deck slab to support a lower part and side parts of a hinge shaft part  210   s  of the expansion joint main body  210 ;   an expansion joint support member  240  installed at one end of the other deck slab to support lower parts of an expansion part of the expansion joint main body  210  and the expansion/shrinkage member  220 ;   anchor bolts  250  for fixing the hinge shaft support member  230  and the expansion joint support member  240  to the opposite deck slabs; and   a rubber seal  260  disposed under the expansion joint main body  210  and detachably installed at a space between both opposite ends of the deck slabs to collect rainwater and foreign substances.   
   
   
       2 . The earthquake-resistant flat expansion joint using a hinge of  claim 1 , wherein the expansion joint main body  210  has a cylindrical hinge shaft part  210   s  fixed to a hinge shaft, and a flat plate part  210   p  integrally formed with the hinge shaft part  210   s.    
   
   
       3 . The earthquake-resistant flat expansion joint using a hinge of  claim 2 , wherein step grooves  210   h  for inserting connection members and fastening the connection members by bolts are formed at side surfaces of the plate parts  210   p  to connect adjacent expansion joint main bodies  210  such that the expansion joints are integrally moved. 
   
   
       4 . The earthquake-resistant flat expansion joint using a hinge of  claim 1 , wherein the expansion/shrinkage member  220  is formed of a corrugated structure having a plurality of hollows  220   h  for accommodating behavior of the plate part  210   p  caused by the expansion/shrinkage and the earthquakes. 
   
   
       5 . The earthquake-resistant flat expansion joint using a hinge of  claim 4 , wherein rise-prevention wrinkles  220   w  are formed at a lower surface of the corrugated structure and disposed between the hollows  220   h  to prevent the expansion/shrinkage member  220  from rising when the plate part  210   p  is moved by the earthquake. 
   
   
       6 . The earthquake-resistant flat expansion joint using a hinge of  claim 1 , wherein the expansion/shrinkage  220  is fixed to an end of the plate part  210   p  of the expansion joint main body  210  and the expansion joint support member  240  by fixing members  300 , and the fixing members  300  connect and fix the expansion/shrinkage member  220  to the end of the plate part  210   p  of the expansion joint main body  210  and a key part of the expansion joint support member  240 , respectively, each of the fixing members  300  having a fixing piece  301  having a groove engaged with one of protrusions  220   t  formed at both ends of the expansion/shrinkage member  220  and a through-hole through which a bolt passes, a bolt  302  for fastening and fixing the fixing piece  301  to each of the plate part  210   p  of the expansion joint main body  210  and the key part of the expansion joint support member  240 , and a bushing  303  having a female threaded part and fixing the bolt  302  to each of the plate part  210   p  of the expansion joint main body  210  and the key part of the expansion joint support member  240 . 
   
   
       7 . The earthquake-resistant flat expansion joint using a hinge of  claim 6 , wherein the bushing  303  is formed of stainless steel or is plated with a metal material to prevent generation of corrosion. 
   
   
       8 . The earthquake-resistant flat expansion joint using a hinge of  claim 1 , wherein the rubber seal  260  comprises a rubber seal main body  450  for collecting rainwater and contaminants, guide rollers  452  for detachably installing the rubber seal main body  450 , and guide rails  454  for fixing and rolling the guide rollers  452 . 
   
   
       9 . The earthquake-resistant flat expansion joint using a hinge of  claim 1 , wherein the expansion joint support member  240 ′ has two sections, one having a flat plate structure and the other having a cylindrical inner periphery structure through which the expansion/shrinkage member  220  can freely reciprocate depending on the behavior of the expansion joint main body  210  while maintaining its shape as it is without compression or extension thereof. 
   
   
       10 . The earthquake-resistant flat expansion joint using a hinge of  claim 9 , wherein the expansion/shrinkage member  220 ′ is formed of a solid rubber plate. 
   
   
       11 . An earthquake-resistant flat expansion joint using a hinge comprising:
 expansion joint main bodies  210 ′ and  210 ″ disposed between opposite ends of deck slabs of a bridge or an elevated road, hinged to one side of the deck slab at its one end to enable behavior in X, Y and Z-axis directions, and expanded or shrunk depending on temperature variation and vibrations due to earthquakes to be moved in the X, Y and Z-axis directions;   a hinge shaft support member  230  installed at one end of the deck slab to support a lower part and side parts of a hinge shaft part  210   s  of the expansion joint main body  210 ′;   an expansion part/hinge shaft support member  240 ″ installed at one end of the other deck slab to support lower parts of an expansion part and a hinge shaft part of the expansion joint main body  210 ″;   anchor bolts  250  for fixing the hinge shaft support member  230  and the expansion part/hinge shaft support member  240 ″ to the opposite deck slabs, respectively; and   a rubber seal  260  disposed under the expansion joint main bodies  210 ′ and  210 ″ and detachably installed at a space between both opposite ends of the deck slabs to collect rainwater and foreign substances.   
   
   
       12 . The earthquake-resistant flat expansion joint using a hinge of  claim 11 , wherein the expansion joint main bodies  210 ′ and  210 ″ are installed at the opposite deck slabs to partially overlap each other, the one expansion joint main body  210 ′ is installed to move along a slope formed at a certain part of a body of the support member  240 ″ of the other expansion joint main body  210 ″, and the other expansion joint main body  210 ″ is installed to move along an upper surface of the one expansion joint main body  210 ′.