Volume 2, Number 4 (December 2004)                   IJCE 2004, 2(4): 257-267 | Back to browse issues page


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GHODRATI AMIRI G., SEDIGHI S.. RELIABILITY OF NONLINEAR STATIC METHOD IN SEISMIC PERFORMANCE PREDICTION OF REINFORCED CONCRETE FRAMES WITH MEDIUM DUCTILITY. IJCE. 2004; 2 (4) :257-267
URL: http://ijce.iust.ac.ir/article-1-30-en.html

Abstract:   (16572 Views)
In the past decade design procedure changed to �performance-based design� from�force-based design�, by this mean many researchers focused on nonlinear static analysis (NSA)and the procedure named �PUSHOVER�. Advantages of this method are defining the inelasticbehavior of structure without nonlinear dynamic analysis (NDA) effort and also defining plastichinges formation in critical elements, and the order of formed plastic hinges. In spite of these goodadvantages NSA is limited to short and planar structures and application of that in tall andtorsionaly asymmetric structures may yield unreliable results.In this study reliability of NSA is investigated by performing both nonlinear static and dynamicanalysis on six 2D moment resisting concrete frames. Non linear dynamic analysis has been doneby the suggested method in FEMA356 guideline called �Target Displacement Method�. A groupof 4 different lateral increasing loads were used in pushover analysis and 3 different groundmotions were applied in NDA. Results indicate that same responses can be obtained by performingNSA, but errors will be increased by frames height increment.
     
Type of Study: Research Paper |

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