Influence of isolation system characteristic strength on the earthquake behavior of base-isolated liquid storage tanks
IR@NISCAIR: CSIR-NISCAIR, New Delhi - ONLINE PERIODICALS REPOSITORY (NOPR)
View Archive Info| Field | Value | |
| Title |
Influence of isolation system characteristic strength on the earthquake behavior of base-isolated liquid storage tanks
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| Creator |
Alhan, C
Gazi, H Guler, E |
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| Subject |
Liquid storage tank
Base-isolation Characteristic strength |
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| Description |
346-352
Earthquake performance of liquid storage tanks may be substantially improved by base-isolation. However, the possibility of facing large isolator displacements in case of large magnitude near-fault earthquakes threatens the safety of these structures, which may be realized if the period of the velocity pulses that typically exist in the near-fault earthquake records are close to their isolation periods. Increasing isolation system characteristic strength may help reducing the aforementioned large isolator displacements but this in turn may have a negative impact on the superstructure response. Therefore, this study aims to investigate the influence of the characteristic strength of the isolation system on the behavior of base-isolated liquid storage tanks under representative historical near-fault and far-fault earthquakes by making use of a set of benchmark tank models with different levels of isolation system characteristic strength ratios. Numerical modeling and non-linear time history analyses are carried out via the academic software 3DBASIS-ME,which offers the possibility of conducting such modeling and analysis following a highly preferred mechanical analog that is able to take the deformability of the tank wall and sloshing of the fluid into account by considering the fundamental sloshing and fundamental fluid-tank modes of vibration as single degree of freedom systems sharing a common isolation base-mat. The seismic responses including isolation system displacement, sloshing fluid displacement, isolation system shear force, fluid-tank shear force, and sloshing fluid shear force are reported in a comparative manner. Results show that while higher characteristic strength effectively reduces large base displacements observed under near-fault earthquakes, it may cause significant amplifications in the superstructure responses particularly under far-fault earthquakes. |
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| Date |
2018-10-23T10:41:36Z
2018-10-23T10:41:36Z 2018-08 |
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| Type |
Article
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| Identifier |
0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/45259 |
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| Language |
en_US
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| Rights |
<img src='http://nopr.niscair.res.in/image/cc-license-sml.png'> <a href='http://creativecommons.org/licenses/by-nc-nd/2.5/in' target='_blank'>CC Attribution-Noncommercial-No Derivative Works 2.5 India</a>
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| Publisher |
NISCAIR-CSIR, India
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| Source |
IJEMS Vol.25(4) [August 2018]
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