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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 11 Issue: 03 | Mar 2024

p-ISSN: 2395-0072

www.irjet.net

Performance Evaluation of Elevated Storage Reservoir Subjected to Earthquake Forces Sameer S Mulani1, S. S. Kadam2, G. D. Lakade3 1Research Scholer, Dept. Civil Engineering, SKN Sinhgad College of Engineering, Maharashtra, India 2Prof. Dr, Dept. Of Civil Engineering, SKN Sinhgad College of Engineering, Maharashtra, India 3Prof, Dept. Of Civil Engineering, SKN Sinhgad College of Engineering, Maharashtra, India

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Abstract - An Elevated water tanks are lifelines of our

factors interact under seismic loading conditions is essential for developing effective design guidelines and retrofitting strategies to enhance the resilience of existing structures [2].

water supply systems. However, earthquakes pose a important hazard to their stability [2]. This study investigates into the seismic response of a reinforced concrete (RC) elevated water tank using advanced computer models. The investigation focuses on a specific tank design with a 50 cubic meter capacity. We created a detailed numerical model incorporating its dimensions and assigned realistic material properties. Staad Pro software was then used to perform a time history analysis, simulating the tank's behavior under earthquake ground motions. Two historical earthquakes, Bhuj and Uttarkashi, were chosen to represent different seismic scenarios. The analysis yielded valuable data on the tank's dynamic response under these varying conditions. This data includes roof displacement, velocity, acceleration, the force at the base (base shear), and the tank's natural frequencies of vibration. A key takeaway is the significant influence of water level on the tank's seismic behavior [15]. The study highlights how a full or partially filled tank reacts differently compared to an empty one. This knowledge is crucial for understanding critical failure mechanisms during earthquakes. Ultimately, this research contributes valuable insights into the seismic vulnerability of elevated water tanks. It covers the way for developing effective retrofitting strategies and improved design guidelines.

In recent years, advancements in structural engineering, computational modeling, and seismic analysis techniques have facilitated more comprehensive assessments of the seismic performance of elevated storage reservoirs. Researchers and practitioners have employed sophisticated numerical simulations, experimental testing, and field investigations to evaluate the behavior of these structures under seismic forces. This paper aims to contribute to the existing body of knowledge by conducting a systematic performance evaluation of elevated storage reservoirs subjected to earthquake forces. Through a combination of numerical modelling and experimental validation, the seismic response of elevated storage reservoirs will be investigated, with a focus on understanding critical failure mechanisms, dynamic characteristics, and the effectiveness of retrofitting measures. The outcomes of this study are expected to provide valuable insights into the seismic vulnerability of elevated storage reservoirs and inform the development of robust design guidelines and risk mitigation strategies. By enhancing our understanding of the seismic behaviour of these structures, we can better safeguard water supply systems against the devastating impacts of earthquakes, ensuring the resilience and reliability of critical infrastructure in earthquake-prone regions.

Key Words: Seismic response, Elevated water tank, Reinforced concrete (RC), Time history analysis, Water level

1. INTRODUCTION Elevated storage reservoirs play a critical role in ensuring reliable water supply to communities, industries, and various other sectors [3]. However, their structural integrity and resilience under seismic events are of paramount importance, particularly in regions prone to earthquakes [3]. The seismic vulnerability of elevated storage reservoirs necessitates thorough evaluation and analysis to mitigate potential risks and ensure the safety of water supply systems [6].

2. METHODOLOGY 2.1 Model Description A RC Elevated water tank having storage capacity of 50 m3 is considered in this study. The container has a square base of side 5m and the height is 2m with a slab. The support structure consists of 4 columns having cross section 0.4m x 0.3m. For study purpose tank full condition is considered, the structure is subjected to two earthquake ground motions (Bhuj and Uttarkashi).

The seismic performance of elevated storage reservoirs depends on various factors such as design considerations, material properties, structural configuration, and dynamic response characteristics [20]. Understanding how these

Impact Factor value: 8.226

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