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Proposed Methods on Enhancement of Dynamic Response of RC Frames and Soil Structure Interaction

Abdulaziz, Dina ; Zidan, Ahmed ; Ahmed, Metwally

IOP conference series. Materials Science and Engineering, 2019-09, Vol.603 (2), p.22080 [Periódico revisado por pares]

Bristol: IOP Publishing

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  • Título:
    Proposed Methods on Enhancement of Dynamic Response of RC Frames and Soil Structure Interaction
  • Autor: Abdulaziz, Dina ; Zidan, Ahmed ; Ahmed, Metwally
  • Assuntos: Columns (structural) ; Cyclic loads ; Dynamic response ; Finite element method ; Frames ; Lateral displacement ; Nonlinear dynamics ; Numerical models ; Reinforced concrete ; Reinforcement (structures) ; Reinforcing steels ; Shear stress ; Soil dynamics ; Soil stresses ; Soil-structure interaction ; Stress concentration ; Structural members ; Three dimensional analysis
  • É parte de: IOP conference series. Materials Science and Engineering, 2019-09, Vol.603 (2), p.22080
  • Descrição: In this paper, proposed methods on enhancement of a nonlinear behavior of reinforced concrete frames subjected to cyclic load. A fully nonlinear dynamic analysis is adapted using three-dimensional finite element analysis by means of ANSYS 16.0 code. All structural elements such as footings, columns and girder are simulated in the numerical model. The concrete is assumed to be nonlinear and isotropic. In addition, some proposed methods are investigated to enhance the performance of RC frames under cyclic loading such as, cross bracing steel at the connections and at girder region as well as additional bent bars at the ends of girder. The results of analyses are presented in terms of envelope capacity, load-displacement relationship, stresses and cracks distribution. The results indicated that the provision of additional reinforcement increased the ultimate lateral capacity, ductility and introduce an additional mechanism for shear stresses for RC frame under cyclic loading. The best performance is observed when the cross-bracing is used at the top and bottom column connections whereas, the lateral capacity and displacement is increased by 12.9 % and 27.63% respectively of that computed for Control Frame. In case of cross-bracing steel at beam column connections and case of cross-bracing at beam region, the lateral capacity of RC frames is about 1.09 and 1.04 times that of control frame respectively. Furthermore, the dynamic analysis is carried out under considering the foundation soil whereas the Drucker-Prager model is used to define the stress strain behavior of soil. Besides, some significant observations on the performance of RC frames with change of the values of parametric study are presented in this paper.
  • Editor: Bristol: IOP Publishing
  • Idioma: Inglês
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