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<p>In this study, the performance of an intake tower with a fixed circular cross section has been investigated for various reservoir surrounding levels and different internal water levels. The models developed are based on five configurations, including I) intake tower without reservoir, II) intake tower with half-filled reservoir and empty interior, III) intake tower with half-filled reservoir and half-filled interior, IV) intake tower with fully filled reservoir and empty interior, and V) intake tower with fully filled reservoir and fully filled interior. Modeling and analysis were conducted using the finite element (FE) software Abaqus. To this end, four dynamic loading scenarios and four seismic loading scenarios, comprising two far-field earthquakes and two near-field earthquakes with varying dominant frequencies, have been employed. To examine the frequency effects of the loadings, the dynamic and seismic loadings have been scaled to a maximum acceleration of 0.2&#xa0;g and 0.5&#xa0;g, respectively. The findings from pulse and seismic analyses reveal a profound influence of loading frequency on structural behavior, contingent upon the reservoir surrounding level and internal water conditions. Notably, higher loading frequencies accentuate Model III responses, whereas lower loading frequencies amplify Model V responses. Furthermore, although Model III exhibits higher maximum response values at higher dominant frequencies, its structural damping time is notably shorter than that of Model V. Additionally, the findings indicate that augmenting the loading frequency may relocate the position of stresses in certain models, transitioning it from the tower’s base to its midsection. Ultimately, the findings underscore the importance and necessity of studying the behavior of cylindrical intake towers with different reservoir surrounding levels and various internal water conditions under different dominant loading frequencies for assessing their behavior and initial design.</p>

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Impact of reservoir height and internal water level on dynamic behavior of cylindrical intake tower under loading with different frequencies

  • 期刊论文

  • 发表日期：

    2025年4月17日

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  • Ehsan Teymouri,
  • Saeed Abbasi

摘要

In this study, the performance of an intake tower with a fixed circular cross section has been investigated for various reservoir surrounding levels and different internal water levels. The models developed are based on five configurations, including I) intake tower without reservoir, II) intake tower with half-filled reservoir and empty interior, III) intake tower with half-filled reservoir and half-filled interior, IV) intake tower with fully filled reservoir and empty interior, and V) intake tower with fully filled reservoir and fully filled interior. Modeling and analysis were conducted using the finite element (FE) software Abaqus. To this end, four dynamic loading scenarios and four seismic loading scenarios, comprising two far-field earthquakes and two near-field earthquakes with varying dominant frequencies, have been employed. To examine the frequency effects of the loadings, the dynamic and seismic loadings have been scaled to a maximum acceleration of 0.2 g and 0.5 g, respectively. The findings from pulse and seismic analyses reveal a profound influence of loading frequency on structural behavior, contingent upon the reservoir surrounding level and internal water conditions. Notably, higher loading frequencies accentuate Model III responses, whereas lower loading frequencies amplify Model V responses. Furthermore, although Model III exhibits higher maximum response values at higher dominant frequencies, its structural damping time is notably shorter than that of Model V. Additionally, the findings indicate that augmenting the loading frequency may relocate the position of stresses in certain models, transitioning it from the tower’s base to its midsection. Ultimately, the findings underscore the importance and necessity of studying the behavior of cylindrical intake towers with different reservoir surrounding levels and various internal water conditions under different dominant loading frequencies for assessing their behavior and initial design.