Effect of near-fault ground motion with pulse signal on dynamic response of dam-reservoir-foundation systems
| Autor: | Can Altunisik, Ahmet, Sesli, Hasan, Husem, Metin |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Građevinar Volume 74 Issue 12. |
| ISSN: | 1333-9095 0350-2465 |
| Popis: | U ovom radu cilj je utvrditi učinke impulsnih pomaka tla uslijed bliskih potresa na dinamički odgovor gravitacijskih brana uključujući i interakciju brana – akumulacija – temelj na različite pristupe modeliranju akumulacije kao što su Westergaardov, Lagrangeov i Eulerov pristup. Kao studija slučaja, betonska gravitacijska brana Sarıyar smještena na rijeci Sakarya, 120 km sjeveroistočno od Ankare, odabrana je za istraživanje učinaka impulsnog pomaka tla uslijed bliskog potresa na odziv brane. Prvo su izložena glavna načela i osnovna formulacija pristupa. Zatim su uspostavljeni modeli brane s konačnim elementima uzimajući u obzir interakciju brana-akumulacija-temelj, pomoću računalnog programa ANSYS., sve da bi se odredio strukturni odgovor brane pod utjecajem impulsnog pomaka tla. Linearne privremene analize provedene su korištenjem Taiwan Chi-Chi 1999. i Imperial Valley 1979. koji prikazuju prividne impulse brzine kao reprezentativne za bliske potrese. Na kraju analize uspoređene su dinamičke karakteristike sve kako bi se demonstrirali modeli učinaka domene fluida i učinaka impulsnog signala. This paper aimed to determine the effects of a pulse signal of near-fault ground motion on the dynamic response of gravity dams, including dam-reservoir-foundation interaction, using different reservoir modelling approaches such as Westergaard, Lagrange, and Euler. As a case study, a Sarıyar concrete gravity dam located on the Sakarya River, 120 km northeast of Ankara, was considered for investigating the near-fault ground-motion pulse effects on dam responses. First, the main principles and basic formulations of these approaches were presented. Then, finite element models of the dam were realized considering dam-reservoir-foundation interaction using ANSYS software. To determine the structural response of the dam under pulse effects of the near-fault ground motion, linear transient analyses were performed using the 1999 Taiwan Chi-Chi and 1979 Imperial Valley ground motions, which display apparent velocity pulses as representative of the near-fault earthquakes. Subsequently, the dynamic characteristics were compared to demonstrate the models of the fluid domain effects and pulse signal effects. |
| Databáze: | OpenAIRE |
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