Reinforcement of Roofs
A Basis for Constructural Designs Aimed at Reducing the Damaging Consequences of Flying Object Impact on Public as Well as Industrial Buildings and Structures
Tech Area / Field
- OTH-BIT/Building Industry Technology/Other
3 Approved without Funding
Georgian Research Institute of Power Engineering and Power Structures, Georgia, Tbilisi
- International Project Management, USA, CA, Alamo
Project summaryThe problem of ensuring serviceability of facilities under extreme loads has become especially pressing since the regrettable events of September 11, 2002 that took place in New York. The time is ripe to revise both the methods adopted and the approaches to the analysis and construction of large structures and facilities demanding utmost safety. Furthermore, it is essential that the structures currently in service should be reinforced to reduce the negative effect of explosions and impacts; we also face the need to work out arrangements that would ensure prompt extinction of the fire.
The goal of the project is: developing a technique for reinforcing in-service large-span shell roofs of structures, which will make it possible to keep to a minimum the adverse effect of flying object direct impact as well as to ensure prompt extinction of the fire.
The objective sought may be accomplished by floating the existing double bending shell with a lattice-like tubular shell-frame, with a damping gasket laid between the frame and the shell. The tubes of the shell-frame are made of high-strength elastic materials and oriented along the shell surface generatrix. The erection work is followed by fireproof mixture injection into the tubing.
Concurrent operation of the newly erected frame and the existing shell will improve roof bearing capacity as well as rigidity, thus reducing the damaging consequences; Furthermore, at the instant the communicating tubes are ruptured by the impact from flying object, the mixture injected under pressure into the tube hollow space is thrown outward thus ensuring the extinction of the fire.
The anticipated parameters incorporated in the roof reinforcement technique proposed;
- the type of a shell - double bending;
- a span - 40ґ40 m;
- shell thickness - 0.24 m;
- roof area - 1600 sq.m;
- rise boom - 13.0 m.
With the reinforcement technology described above, the roofs will be distinguished by remarkable safety and reliability compared to other solutions offered.
The project proposed may be of interest in terms of its application not only to industrial and civil structures, but also to the facilities employed in transportation industry as well as in power industry (nuclear, thermal and waterpower plants), in mechanical engineering and some other sectors.
The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.
ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.