Influence of spatial variation of ground motions on dynamic responses of supporting towers of overhead electricity transmission systems: An experimental study

2016 ◽  
Vol 128 ◽  
pp. 67-81 ◽  
Author(s):  
Li Tian ◽  
Xia Gai ◽  
Bing Qu ◽  
Hongnan Li ◽  
Peng Zhang
Keyword(s):  
Experimental Study ◽  
Spatial Variation ◽  
Ground Motions ◽  
Dynamic Responses ◽  
Transmission Systems ◽  
Electricity Transmission

scholarly journals RTDS-based HIL testing platform for complex modern electricity transmission systems

2018 ◽  
Vol 2018 (15) ◽  
pp. 1315-1320 ◽  
Author(s):  
Ying Xue ◽  
Dechao Kong ◽  
Rui Guan ◽  
Jianing Li ◽  
Andrew Taylor ◽  
...  
Keyword(s):  
Transmission Systems ◽  
Electricity Transmission ◽  
Testing Platform

Mobile monitoring system to take nationwide PQ measurements on electricity transmission systems

Measurement ◽  
2009 ◽  
Vol 42 (4) ◽  
pp. 501-515 ◽  
Author(s):  
Ö. Salor ◽  
S. Buhan ◽  
Ö. Ünsar ◽  
B. Boyrazoğlu ◽  
E. Altıntaş ◽  
...  
Keyword(s):  
Monitoring System ◽  
Mobile Monitoring ◽  
Transmission Systems ◽  
Electricity Transmission

Simulation of Palu IV Bridge Collapse using Near-Fault Ground Motions

2019 ◽  
Author(s):  
Iswandi Imran ◽  
Budi Santoso ◽  
Ary Pramudito ◽  
Muhammad Kadri Zamad
Keyword(s):  
Spatial Variation ◽  
Ground Motions ◽  
Time History ◽  
Seismic Demand ◽  
Fault Line ◽  
Near Fault ◽  
Failure Simulation ◽  
Bridge Collapse ◽  
Pulse Type ◽  
Bridge Bearing

<p>The earthquake near Palu, Sulawesi (Indonesia) on September 28, 2018 with a magnitude of M7.4 was caused by a shallow strike-slip of Palu-Koro fault. The earthquake and the subsequent tsunami have caused the collapse of the Ponulele Bridge (Palu IV Bridge). The steel box bowstring arch bridge was located near-fault regions (within 1,5 km from fault line) that have not been identified during the design process. This bridge may have been damaged by the presence of fling-step pulses in the near-fault pulse-type ground motions that increases the damaging potential of such ground motions. This paper presents the failure simulation of the bridge subjected to the near fault pulse type time history with spatial variation ground motions applied on multiple bridge supports. From the simulation, it is concluded that the near fault effects and the spatial variation of the ground motion have increased significantly the seismic demand on the bridge. This increase causes the failure in the anchorage of the bridge bearing system.</p>

Dynamic responses of bridges subjected to near‐fault ground motions

2000 ◽  
Vol 23 (4) ◽  
pp. 455-464 ◽  
Author(s):  
Wen‐I Liao ◽  
Chin‐Hsiung Loh ◽  
Shiuan Wan ◽  
Wen‐Yu Jean ◽  
Juin‐Fu Chai
Keyword(s):  
Ground Motions ◽  
Dynamic Responses ◽  
Near Fault

Spatial variation of seismic ground motions: An overview

2002 ◽  
Vol 55 (3) ◽  
pp. 271-297 ◽  
Author(s):  
Aspasia Zerva ◽  
Vassilios Zervas
Keyword(s):  
Spatial Variation ◽  
Seismic Response ◽  
Ground Motions ◽  
Review Article ◽  
Stochastic Description ◽  
Simulation Techniques ◽  
Alternative Approach ◽  
Recorded Data ◽  
Semi Empirical ◽  
Spatial Coherency

This study addresses the topic of the spatial variation of seismic ground motions as evaluated from data recorded at dense instrument arrays. It concentrates on the stochastic description of the spatial variation, and focuses on spatial coherency. The estimation of coherency from recorded data and its interpretation are presented. Some empirical and semi-empirical coherency models are described, and their validity and limitations in terms of physical causes discussed. An alternative approach that views the spatial variation of seismic motions as deviations in amplitudes and phases of the recorded data around a coherent approximation of the seismic motions is described. Simulation techniques for the generation of artificial spatially variable seismic ground motions are also presented and compared. The effect of coherency on the seismic response of extended structures is highlighted. This review article includes 133 references.

scholarly journals Seismic Response of a Base Isolated Cable-Stayed Bridge Under Near-Fault Ground Motion Excitations

2018 ◽  
Vol 15 (1) ◽  
pp. 1-14
Author(s):  
Ahad Javanmardi ◽  
Zainab Ibrahim ◽  
Khaled Gheadi ◽  
Mohammed Jameel ◽  
Usman Hanif ◽  
...  
Keyword(s):  
Ground Motion ◽  
Ground Motions ◽  
Nonlinear Dynamic Analysis ◽  
Dynamic Responses ◽  
Base Shear ◽  
Seismic Behaviour ◽  
Isolation System ◽  
Near Fault ◽  
Cable Stayed Bridge ◽  
Near Fault Ground Motion

Nowadays, development of cable-stayed bridges is increasing around the world. The mitigation of seismic forces to these bridges are obligatory to prevent damages or failure of its structural members. Herein, this paper aimed to determine the near-fault ground motion effect on an existing cablestayed bridge equipped with lead-rubber bearing. In this context, Shipshaw cable-stayed bridge is selected as the case study. The selected bridge has a span of 183.2 m composite deck and 43 m height of steel tower. 2D finite element models of the non-isolated and base isolated bridges are modelled by using SAP2000. Three different near-fault ground motions which are Tabas 1978, Cape Mendocino 1992 and Kobe 1995 were subjected to the 2D FEM models in order to determine the seismic behaviour of the bridge. The near-fault ground motions were applied to the bridge in the longitudinal direction. Nonlinear dynamic analysis was performed to determine the dynamic responses of the bridge. Comparison of dynamic response of nonisolated and base isolated bridge under three different near-fault ground motions were conducted. The results obtained from numerical analyses of the bridge showed that the isolation system lengthened the period of bridge and minimised deck displacement, base shear and base moment of the bridge. It is concluded that the isolation system significantly reduced the destructive effects of near-fault ground motions on the bridge.

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