Semi-fabricated composite shielding shell with ultra-high performance concrete (uhpc)

Abstract

The purpose of the present invention is to disclose a semi-fabricated composite shielding shell with ultra-high performance concrete (UHPC), comprising an UHPC layer, a RC layer, and a back anti-crack panel. The RC layer is arranged between the UHPC layer and the back anti-crack panel, and the RC layer and the UHPC layer are connected to each other by means of connectors. Compared with the prior art, the semi-fabricated composite shielding shell has the advantages that: the UHPC layer, instead of a steel plate, is used on the side of a building having a protection requirement, damage is generally limited to the UHPC layer, and main stress reinforcements of the RC layer cannot be affected; the sizes and contours of respective components (the UHPC layer, the RC layer, and the back anti-crack panel) of the shielding shell can be flexibly adjusted according to the shape and protection requirement of the building; the rigidity-density ratio can be flexibly adjusted; the thickness of the shielding shell is greatly reduced; and the space size of the building is reduced, and construction costs are reduced. The shielding shell is suitable for the protection requirement of the building against a projectile, thus the purpose of the present invention is achieved.

1 . A semi-fabricated composite shielding shell, comprising an ultra-high performance concrete (UHPC) layer, a RC layer, and a back anti-crack panel, wherein the RC layer is arranged between the UHPC layer and the back anti-crack panel, and the RC layer and the UHPC layer are connected to each other by means of connectors. 
     
     
         2 . The semi-fabricated composite shielding shell according to  claim 1 , wherein a number of studs are welded to the back anti-crack panel, and the back anti-crack panel is connected to the RC layer through the studs. 
     
     
         3 . The semi-fabricated composite shielding shell according to  claim 1 , wherein the UHPC layer is composed of prefabricated panels made of ultra-high performance concrete and connected to each other in a fabricated structure with staggered seams, and constructional steel reinforcements are arranged in the UHPC layer. 
     
     
         4 . The semi-fabricated composite shielding shell according to  claim 1 , wherein the RC layer is a reinforced concrete layer casted with ordinary-strength concrete and internally provided with RC layer main reinforcements and RC layer tension reinforcements. 
     
     
         5 . The semi-fabricated composite shielding shell according to  claim 2 , wherein the studs are made of high-strength carbon steel or low alloy steel. 
     
     
         6 . The semi-fabricated composite shielding shell according to  claim 4 , wherein the RC layer main reinforcements of the RC layer and the RC layer tension reinforcements of the RC layer are HRB400E steel reinforcements. 
     
     
         7 . The semi-fabricated composite shielding shell according to  claim 1 , wherein the connectors comprise tension reinforcements and bolts. 
     
     
         8 . The semi-fabricated composite shielding shell according to  claim 3 , wherein the constructional steel reinforcements of the UHPC layer are HRB400E steel reinforcements.