Seismic Response of High-Voltage Transformer-Bushing Systems Incorporating Flexural Stiffeners II: Experimental Study

2013 ◽  
Vol 29 (4) ◽  
pp. 1353-1367 ◽  
Author(s):  
Maria Koliou ◽  
Andre Filiatrault ◽  
Andrei M. Reinhorn
Keyword(s):  
Seismic Response ◽  
High Voltage ◽  
Companion Paper ◽  
Cover Plate ◽  
Rigid Base ◽  
Shake Table ◽  
Test Results ◽  
Voltage Transformer ◽  
Shake Table Testing ◽  
Cover Plates

A numerical study conducted on four transformer-bushing models presented in a first companion paper indicated that high-voltage bushings mounted on the cover plates of transformers are more vulnerable to seismic loading than bushings mounted on a rigid base. This would explain why the good performance of bushings mounted on a rigid base observed during shake table testing does not correlate well with their performance in the field. In this second companion paper, the addition of flexural stiffeners on the transformer cover plates as a means to stiffen the base of bushings and mitigate their seismic vulnerability is investigated experimentally. Shake table testing was conducted on a 230 kV porcelain bushing mounted on a support structure incorporating a flexible cover plate and two stiffener configurations. Test results confirmed that stiffening the cover plates is beneficial to the seismic response of high-voltage bushings. Test results are compared to the predictions of finite element analyses.

Seismic Response of High-Voltage Transformer-Bushing Systems Incorporating Flexural Stiffeners I: Numerical Study

2013 ◽  
Vol 29 (4) ◽  
pp. 1335-1352 ◽  
Author(s):  
Maria Koliou ◽  
Andre Filiatrault ◽  
Andrei M. Reinhorn
Keyword(s):  
Seismic Response ◽  
High Voltage ◽  
Seismic Vulnerability ◽  
Numerical Study ◽  
Rigid Base ◽  
Voltage Transformer ◽  
Shake Table Testing ◽  
Dynamic Analyses ◽  
High Voltage Transformer ◽  
Cover Plates

High-voltage bushings have exhibited vulnerability during past earthquakes. The good performance of bushings mounted on a rigid base observed during shake table testing does not correlate well with their performance in the field. It is suspected that the seismic performance of high-voltage bushings is improved when mounted on a rigid base, as opposed to when mounted on more flexible cover plates of transformers. In this first of two companion papers, the seismic response of bushings was investigated numerically for various mounting conditions. The addition of flexural stiffeners on the transformer cover plates was explored as a means to stiffen the base of the bushings and mitigate their seismic vulnerability. Linear dynamic analyses conducted on four transformer-bushing system models showed that the simple approach of stiffening the cover plates of transformers is beneficial to the seismic response of high-voltage bushings.

Seismic response of PP-band and FRP retrofitted house models under shake table testing

2016 ◽  
Vol 111 ◽  
pp. 298-316 ◽  
Author(s):  
M. Umair Saleem ◽  
Muneyoshi Numada ◽  
Muhammad Nasir Amin ◽  
Kimiro Meguro
Keyword(s):  
Seismic Response ◽  
Shake Table ◽  
Shake Table Testing

Shake table testing for the seismic response of a container crane with uplift and derailment

2021 ◽  
Vol 114 ◽  
pp. 102811
Author(s):  
Van Bac Nguyen ◽  
Jungwon Huh ◽  
Bismark Kofi Meisuh ◽  
Quang Huy Tran
Keyword(s):  
Seismic Response ◽  
Shake Table ◽  
Shake Table Testing ◽  
Container Crane

Out-of-Plane Dynamic Stability of Unreinforced Masonry Walls in One-Way Bending: Shake Table Testing

2016 ◽  
Vol 32 (3) ◽  
pp. 1675-1697 ◽  
Author(s):  
Osmar Penner ◽  
Kenneth J. Elwood
Keyword(s):  
Ground Motion ◽  
Companion Paper ◽  
Unreinforced Masonry ◽  
Masonry Walls ◽  
Shake Table ◽  
Brick Wall ◽  
Test Results ◽  
Ground Motion Variability ◽  
Out Of Plane ◽  
Assessment Guidelines

Given sufficient anchorage to the diaphragms, an unreinforced masonry (URM) wall subjected to out-of-plane inertial forces will likely develop a horizontal crack at an intermediate height about which the wall will rock as semirigid bodies. The effect of wall slenderness on out-of-plane stability has been demonstrated in past studies, but treatment of the effects of diaphragm flexibility and ground motion variability has been limited. This paper presents an experimental study examining the out-of-plane stability under seismic loading of URM walls connected to flexible diaphragms. Five full-scale unreinforced solid clay brick wall specimens spanning one story were subjected to earthquake ground motions using a shake table. The top and bottom of the walls were independently connected to the shake table through coil springs, simulating the flexibility of diaphragms. Variables examined experimentally included diaphragm stiffness and wall height. Both the amount of rocking observed as well as the ground motion scale causing collapse varied significantly with changes in the diaphragm properties. The test results provided data used for validation of a rigid-body rocking model, enabling an extensive parametric study on wall stability and the development of new assessment guidelines in a companion paper.

scholarly journals Seismic qualification and time history shake-table testing of high voltage surge arrester under seismic qualification level moderate

2018 ◽  
Vol 5 (1) ◽  
pp. 1431375 ◽  
Author(s):  
Noman Ullah ◽  
Syed Mohammad Ali ◽  
Rahman Shahzad ◽  
Faisal Khan ◽  
Sérgio Cruz
Keyword(s):  
High Voltage ◽  
Time History ◽  
Shake Table ◽  
Shake Table Testing
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