Energy Based Design of Rc Staging in Elevated Service Reservoir

Elevated service reservoirs (ESRs) are inverted pendulum structures and are often categorized under lifeline structures. They are expected to remain functional after the earthquake to provide essential drinking water and water for post-earthquake firefighting. The current code-based design procedure of ESR in India is similar to the design procedure of other structures and does not explicitly provide insight into its post-earthquake behavior. Energy-Based Design (EBD) can provide a better and more reliable alternative to overcome the deficiencies of code-based design. EBD considers a coherent approach to estimate the input energy, the elastic energy dissipation, and the plastic energy dissipation, taking into account the inelastic behavior of structural members. In the present research, various issues of the EBD for frame staging of the ESR have been identified and assessed using linear and nonlinear analysis. A comparison of the seismic behavior of the ESR according to the Indian code and the EBD has been made. Besides, the structural design procedure based on the column tree method (CTM) has been modified to suit the specific behavior of the ESR.