Joint for prefabricated concrete blocks in non-plastic hinge zone of earthquake-resistant pier

Abstract

A joint for the prefabricated concrete blocks of the quake-resistant pier developed for connecting the prefabricated reinforced concrete blocks employed in the non-plastic hinge zone of the earthquake-resistant reinforced concrete pier comprises mainly an upper prefabricated reinforced concrete block and a lower prefabricated reinforced concrete block, wherein a layer of resin binder is applied between the engaging concave and the engaging convex of the prefabricated reinforced concrete blocks, so as to connect the two prefabricated reinforced concrete blocks to withstand shear stress applied on the pier, and the two prefabricated reinforced concrete blocks are also connected firmly by pre-stressed keys to withstand bending stress applied on the pier. By connecting mechanisms, the present way of prefabricated construction can achieve the same earthquake-resistant capability as the traditional in situ construction.

What is claimed is:  
     
         1 . A joint for the prefabricated concrete blocks of the earthquake-resistant pier which is developed for the non-plastic hinge zone of the earthquake-resistant reinforced concrete pier, wherein said joint for the prefabricated concrete blocks of said quake-resistant pier mainly comprises a upper reinforced concrete block and a lower reinforced concrete block, on the bottom of said upper reinforced concrete block and on the top of said lower reinforced concrete block are provided with an engaging concave and an engaging convex respectively, wherein said engaging concave and said engaging convex are complementary in shape so as to connect said two prefabricated concrete blocks to withstand shear stress applied on the pier, and said blocks are also connected firmly by pre-stressed keys to withstand bending stress applied on said pier.  
     
     
         2 . The joint as claimed in  claim 1 , wherein resin binder can be applied on said engaging concave of said upper reinforced concrete block and on said engaging convex of said lower reinforced concrete block.  
     
     
         3 . The joint as claimed in  claim 1 , wherein the exterior of said joint of said upper reinforced concrete block and said lower reinforced concrete block can be wrapped with a reinforced layer  
     
     
         4 . The joint as claimed in  claim 3 , wherein said reinforced layer may be a single layer or multi-layers, and the material of said reinforced layer can be steel plate or fiber reinforced plastic (FRP) material.  
     
     
         5 . The joint as claimed in  claim 1 , wherein the exteriors of said engaging concave of said upper reinforced concrete block and said engaging convex of said lower reinforced concrete block can be installed a plurality of reinforced steels.