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Cyclic Behavior of Interior Reinforced Concrete Beam-column Connection with Self-consolidating

Salehi Mobin, Jalal | 2016

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  1. Type of Document: Ph.D. Dissertation
  2. Language: Farsi
  3. Document No: 50029 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Kazemi, Mohammad Taghi
  7. Abstract:
  8. A significant amount of research in self-consolidating concrete technology is being placed in evaluating the suitability of the material for use in structural applications. However, research is needed to confirm the ability of self-consolidating concrete structural elements to adequately resist vertical and lateral loads. In a reinforced concrete building subjected to earthquake type loading, the beam to column connections constitute one of the critical regions and they must be designed and detailed to dissipate large amounts of energy without a significant loss of stiffness or strength. In the experimental part of this study, four full size interior beam-column subassemblages with 3.0 m column high and 3.9 m beam width detailed in accordance with the principles of capacity design and philosophy of strong column-weak beam approach. The specimens made with normal and self-consolidating concrete were tested under quasi-static loadingwhich was intended to simulate earthquake input. Reverse cyclic loading applied at top of column and with a constant axial load applied on the column by prestressing. The beam-column joint specimens were instrumented with linear variable displacement transducers and strain gauges to determine load-displacement traces, cumulative dissipated energy and secant stiffness. Based on the results of this limited study, it can be concluded that although the cumulative dissipated energy by self-consolidating concrete specimens is about 24 % lower than normal concrete specimen, the load displacement curve and secant stiffness of self-consolidating concrete specimens are quite satisfactory and difference is small. In the analytical part of this study, a model for beam-column subassemblages is developed from the hysteretic behavior of SCC specimens observed during testing. The effect of some parameters such as column axial forces, the level of confining, joint aspect ratio and concrete compressive strength studied. The results that obtained from experiments shows that SCC specimens have enough strength and ductility in seismic excitations and be in good agreement with normaly vibrated concrete
  9. Keywords:
  10. Self Consolidating Concrete ; Cyclic Loading ; Beam Column Connection ; Energy Dissipation ; Beam Wall Connection ; Self Compacting Concrete (SCC)

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