In the retrofit method, using CFRP sheets, the flexural and shear strength would be increased by applying the CFRP sheets with the fibers oriented in the vertical or horizontal direction. The application of externally bonded Carbon Fiber Reinforced Polymer (CFRP) sheets is an effective seismic strengthening procedure in order to improve the behavior of reinforced concrete shear walls. Analysis results of a model with an optimized thickness of a steel jacket instead of an over-hanging part of the boundary element show the ductile behavior of a strengthened wall close to the behavior of the base RC wall with boundary elements this achievement would lead to the theory that steel jacketing could be an alternative for the boundary elements of RC shear walls. Analytical results are used to evaluate the capacity curves (Load-Displacement relationships) of strengthened RC shear walls. #Braced frame vs perfect balance verification#Calibration and verification of a base RC wall has been done by comparing the results of the finite element model and also the experimental model. The results of an analytical and parametric study on the effectiveness of using externally bonded steel plates and FRP sheets on RC shear walls as a retrofit technique so as to improve their seismic behavior have been investigated in this paper. Results reveal that for buildings having up to 8 stories, braced frames are preferred and as height increases, utilization of moment frames leads to more optimized weight of consumed steel.Ĭomposite Reinforced Concrete (RC) wall system refers to a cantilever composite wall, where steel or Fiber Reinforced Polymer (FRP) components are embedded in or attached to an RC wall. For this purpose, a building with 27.8×20.6 m cross section and 4, 8, 12 and 16 stories is modeled and studied. In other words, it is attempted to assess and compare the weight of consumed steel and important structural parameters of the building in two systems braced frames and moment frames. braced frames-steel consumption and structural analysis parameters were evaluated. In this paper, moment resistant frames vs. As a result of increasing in expenditures corresponding to the building's steel structures, presenting an optimal and appropriate structural plan resulting in maintenance of safety and reduction of consumed steel contributes to project cost reduction. In this paper, buildings with similar plans in 4, 8, 12 and 16 stories were modeled with different structural systems and factors such as the effect of regulation control for steel structure weight and maximum roof displacement, structure frame weight and values of base shear are explored. Selecting of an appropriate structural system in steel structures is one of the factors affecting the weight of consumed steel and consequently, the economics of the project.
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