نوع مقاله : یادداشت فنی
دانشکدهی فنی، گروه عمران، دانشگاه تبریز
عنوان مقاله [English]
In this paper, the use of cable systems is investigated, in order to rehabilitate buildings. The first system is a consistent cable system, in which pre-tensioned continuous cables, with sliding connections at the floors of mid-stories, is used to increase structural lateral stiffness. At the end of each cable, a spring damper is used, in order to dissipate the energy. The next system involves X-form pre-stressed cables, which are used as X forms
in one, or in multiple, span(s) of a frame. These systems can be replaced with other systems, due to the high tensile resistance of the cable, their ease of replacement, their high speed performance and economy, etc. They can also be used to rehabilitate existing buildings. The pre-tensioning force amount of the cables in these
systems should be placed in a specific range. This range has been found for two concrete frames of three and six stories in different cases. Using a consistent cable system, one can easily set the cable lateral stiffness at each story by changing the cable passing position from the story floor. The system was modeled using a SAP 2000 package and the optimum of the cable form was obtained. Comparing flexural frame results with the optimized
case cable system showed that the most reduction in relative lateral displacement occurred in the stories which had maximum displacement in the flexural frame system. Finally, comparison of the flexural frame with the cable system showed a considerable reduction in displacement and element internal forces.