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   Optimal Placement of Post-Tensioned Self-Centering Yielding Braced Systems For Braced Frame Structures  
   
نویسنده Nobahar Elnaz ,Asgarian Behrouz ,Torabi Goodarzi Ashkan ,Mercan Oya
منبع Numerical Methods In Civil Engineering - 2019 - دوره : 4 - شماره : 2 - صفحه:17 -35
چکیده    The experience of past prominent earthquakes establishes the fact that the structure rsquo;s catastrophes and casualties can be dramatically decreased through the use of selfcentering systems. a promising posttensioned selfcentering yielding braced system (ptscybs) has been developed, comprising of two main components, including the posttensioned wires, exhibiting the desirable selfcentering properties, and steel bars, providing the energy dissipation capacity. the structural application of such systems is expeditiously expanding due to their capabilities of not only reducing the residual deformations of the structures but also improving the structure rsquo;s performance level. as such, identifying optimal design and proper placement of the proposed device in the structure is of crucial importance. in this paper, the mechanics of the proposed system, as well as a simple and efficient approach for determining the optimal design of the pt-scybs, have been proposed. numerical models have been employed to examine the effect of various configurations of the device on the hysteretic behavior of the proposed ptscybs. nonlinear static and dynamic analyses are performed on the seismically deficient 3- and 9-story moment resisting frames (mrfs), enhanced with the optimal placement of the pt-scybs. comparing the results of the pt-scybs buildings and mrfs, it can be concluded that the residual drift decreased by 96% and 77% for the 3- and 9-story buildings, respectively. as such, the optimal design of the proposed system in the building causes notably lower residual drifts as compared with the mrf buildings, resulting in enhanced seismic performance.
کلیدواژه Self-Centering Systems ,Post-Tensioned Wires ,Residual Deformations ,Energy Dissipation ,Nonlinear Dynamic Analyses ,Optimal Design
آدرس K. N. Toosi University Of Technology, Faculty Of Civil Engineering, Iran, K. N. Toosi University Of Technology, Faculty Of Civil Engineering, Iran, Isfahan University Of Technology, Department Of Mechanical Engineering, Iran, University Of Toronto, Department Of Civil And Mineral Engineering, Canada
 
     
   
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