This is a proposal to develop a lightweight, low-maintenance, as well as adjustable stiffening system which can be used in the rehabilitation of steel structural systems such as bridges and industrial buildings. Presently, the cost of increasing the load-carrying capacity of an existing steel structure is very expensive. E.T. Techtonics proposes to solve this problem by using a prestressed stiffening system of kevlar 49 and E-glass/polyester resin. These materials have excellent corrosion and fatigue resistance as well as being lightweight. The design emphasizes the increase in strength and stiffness provided by the system as well as the ease of erection. The objectives of the research will focus on the advantages derived from using a single prestressed cable system versus a double prestressed cable system. It will also address whether E-glass/polyester resin posts and connections offer any advantages in comparison to similar components in steel. The Phase I effort will involve an investigation into 3 major areas: materials, geometry, and construction. If the research is successful in Phases I and 11, an economical, lightweight, low-maintenance stiffening system can be built which provides increased strength and stiffness to an existing steel structure.Anticipated Results and
Potential Commercial Applications: Potential commercial applications include the rehabilitation of existing steel bridges, off-shore drilling platforms, and industrial facilities such as pipe racks, platforms, warehouses, and process structures.
