Evaluation of Ductility factor for the Elevated Water tank

Vimlesh V. Agrawal, Indrajit N. Patel

Abstract


In the current procedures of design and analysis for seismic forces, base shear is calculated by the elastic strength demand divided by the strength reduction factor. This calculated factor is known as the Response Reduction factor ‘R’, which means for ductility, redundancy, Over-strength, and damping of a structural configuration. In the present study, the Response reduction factor accounting for ductility is known as the Ductility factor (Rμ). The Ductility factor is defined as the ratio of elastic strength capacity imposed on the single degree of freedom system to inelastic strength capacity for a given ductility ratio. The Ductility factor allows a system to behave in-elastically within the target ductility ratio during the design level earthquake ground. The objective of this study is to determine the ductility factor considering different parameters. It generally requires study to determine the Ductility factor. In the present study, the Ductility factor is determined for different parameters. For this purpose, statistical studies are carried out using different parameters such as the height of the tank, capacity of the tank, tank full and empty condition, and different earthquake zone. The Ductility factor is assumed to be a function of each of the above parameters. The effects of each parameter on the Ductility factor are also discussed at the end.

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References


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