STRENGTHENING OF REINFORCED CONCRETE ROOF WITH STEEL FRAME

Abstract

Strengthening methods of reinforced  concrete roofs are known and developed in 
sufficient  detail.  They  are  classified  according  to  the  constructions:  strengthening  of  simply 
supported and continuous beams, cantilever beams, panels, girders, trusses, arches, etc. But all the 
proposed  ways  have  common  disadvantages  –  they  require  open  space  for  work,  provide  for 
preliminary  unloading,  and  under  certain  circumstances,  partial  dismantling  of  significantly 
damaged structures, and cannot consider the features of a specific technical situation naturally. We 
offer the strengthening method of not a single beam, but the entire roof block, with limited time 
period and the need to restart the production process in the shortest possible time, which has got 
critical  damage,  during  the  situation  that  excludes  temporary  unloading,  and  the  dismantling  of 
damaged areas or structures is impossible. The additional technical problem is that the supporting 
vertical  structures  of  the  emergency  shutdown  –  the  columns  are  also  in  a  critical  technical 
condition. Therefore, the attempt to dismantle any load-bearing element will lead to the complete 
destruction  of  a  large  part  of  the  industrial  building  and  the  cessation  of  production  for  a 
considerable time period. The use of a spatial steel frame simplifies the strengthening work, speeds 
up the return to production and does not increase the material costs