Seismic Protection of High Voltage Bushings By Using Polyuretan Springs


Abstract eng:
High voltage bushing structures are most vulnerable components of electrical substations during strong seismic excitation. A new low-cost seismic isolation device for high voltage porcelain electric bushings has been proposed and deliberated at the Structural and Earthquake Engineering Laboratory (STEELab) of Istanbul Technical University. The seismic isolation device consists of steel plates and four polyurethane springs. The polyurethane springs are placed between the steel plates and they are post-tensioned by means of the bolt located at the center of the device. A series of preliminary tests in which steel column was used instead of real bushing, have been conducted in the laboratory. The tests performed can be classified into three groups. Quasi-static cyclic tests are in the first group. In the second group, white noise tests, pull-back tests and hammer tests are performed to determine the damping property and vibration frequency of the device. In the last group, uniaxial shake table tests are accomplished for the isolated case and its fixed base version by using real acceleration records. The experimental results obtained from the preliminary tests indicate that the proposed seismic isolation device is able to be competent to protect the high voltage bushings from strong seismic excitation.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 2381.:
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