DESIGN TECHNIQUES TO STRENGTHEN ‘SOFT BUILDINGS’ AGAINST ACTS OF TERROR AND CAR BOMBS

We are the engineers, we are the world makers hence we are going to develop the process and new methods and products for hardening of “soft buildings” against acts of terror and Car Bomb attacks. Because India has been facing a problem terror and car bomb attack from many years. Now the time has came to take care of buildings and human beings and save the country. The design methodologies that will be presented are based on practical experience in detailed design of retrofit projects, testing of retrofit systems and the numerous investigations of actual bombings in the India. We are going to present the development and testing of following systems:
SHIELDING THE BLAST WITH EXTERNAL LIGHT WALLS: Shielding of the initial
reflected pressure can be achieved with relatively light or even movable walls.
Shielding walls have proven to be efficient, at relatively close standoff distances and at reducing the reflected peak pressure in one order or more.
“WET” AND “DRY” RETROFIT OF MASONRY WALLS: Concrete skins are efficient and cost effective for hardening of external walls. Durisol bricks, filled with concrete, provide an ideal system for close setbacks. Design properties include architectural and structural advantages, simple logistics and ease of construction. These systems have been tested for equivalent levels of protection with “built in” windows and doors.
CABLING SYSTEMS COMBINED WITH WINDOWS AND GLASS CURTAIN
WALLS: The goal of this technique is to protect people from flying glass. Cabling
systems provide a solution to the problem. Windows and curtain walls, combined with the cabling system, have been tested to meet loads of about 60 psi.
LIGHT STEEL DOORS FOR NEW CONSTRUCTION AND RETROFIT: Retrofit doors have been designed to be installed on standard wooden frames of existing construction. The design is light, architecturally pleasing and looks like standard office doors. The design door withstands blast leakage levels of about 100 psi/msec. The design has also been tested to meet ballistic threat level criteria.