Yokohama-Bay cable-stayed bridge seismic response analysis during the 2011 Great East Japan Earthquake

2013 ◽  
pp. 117-118
Keyword(s):  
Seismic Response ◽  
Great East Japan Earthquake ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Cable Stayed Bridge

Confirmation of Seismic Integrity of HTTR Against 2011 Great East Japan Earthquake

2016 ◽  
Author(s):  
Masato Ono ◽  
Kazuhiko Iigaki ◽  
Yosuke Shimazaki ◽  
Atsushi Shimizu ◽  
Hiroyuki Inoi ◽  
...  
Keyword(s):  
High Temperature ◽  
Seismic Response ◽  
Seismic Analysis ◽  
Evaluation Criteria ◽  
Reactor Power ◽  
Great East Japan Earthquake ◽  
Great Earthquake ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Energy Agency

Japan Atomic Energy Agency (JAEA) has carried out research and development to establish the technical basis of High Temperature Gas-cooled Reactor (HTGR) by using High Temperature engineering Test Reactor (HTTR). On March 11th, 2011, the Great East Japan Earthquake of magnitude 9.0 occurred. When the great earthquake occurred, the HTTR had been stopped under the periodic inspection and maintenance of equipment and instrument. In the great earthquake, the maximum seismic acceleration observed at the HTTR exceeded the maximum value in seismic design. The visual inspection of HTTR facility was carried out for the seismic integrity conformation of HTTR. The seismic analysis was also carried out using the observed earthquake motion at HTTR site to confirm the integrity of HTTR. The concept of comprehensive integrity evaluation for the HTTR facility is divided into two parts. One is the “inspection of equipment and instrument”. The other is the “seismic response analysis” for the building structure, equipment and instrument using the observed earthquake. For the basic inspections of equipment and instrument were performed for all them related to the operation of reactor. The integrity of the facilities is confirmed by comparing the inspection results or the numerical results with their evaluation criteria. As the result of inspection of equipment and instrument and seismic response analysis, it was judged that there was no problem to operate the reactor, because there was no damage and performance deterioration, which affects the reactor operation. The integrity of HTTR was also supported by the several operations without reactor power in cold conditions of HTTR in 2011, 2013 and 2015.

scholarly journals Simulation of the In Situ Spatially Varying Ground Motions and Nonlinear Seismic Response Analysis of the Cable-Stayed Bridge

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Jin Zhang ◽  
Ke-jian Chen ◽  
Neng-pan Ju ◽  
Shi-xiong Zheng ◽  
Hong-yu Jia ◽  
...  
Keyword(s):  
Seismic Response ◽  
Ground Motions ◽  
Element Model ◽  
Response Analysis ◽  
Seismic Response Analysis ◽  
Nonlinear Seismic Response ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Wave Effects

To study the nonlinear seismic behavior and seismic resistance of the long-span cable-stayed bridges subjected to earthquakes, the multidimensional and multisupported artificial ground motions are synthesized first based on the in situ site conditions of the bridge considering the coherent and traveling wave effects. Then, considering the material nonlinearity of the cable-stayed bridge, a 3D finite element model is established based on the OpenSees platform, and the nonlinear seismic response analysis of the bridge is carried out under the synthetic artificial ground motions. The nonlinear seismic response of main bridge components such as piers, towers, bearings, and cables is analyzed, and key conclusions and observations are drawn.

Seismic Response Analysis of Cable-Stayed Bridge Tower which Does Not Consider the Pile-Soil Interaction (I)

2012 ◽  
Vol 461 ◽  
pp. 593-596
Author(s):  
Li Na Zhang ◽  
Feng Chen Li ◽  
Jian Feng Wu ◽  
Wei Bing Luo
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Seismic Action ◽  
Seismic Response Analysis ◽  
Displacement Response ◽  
Finite Element Software ◽  
Cable Stayed Bridge ◽  
Tower Structure ◽  
Different Characteristics ◽  
Bridge Tower

For the problem of analysis of earthquake response of cable-stayed tower bridge, the foundation is given as the rigid consolidation, do not consider the interaction of soil and structure, the finite element software ABAQUS is used for seismic response analysis. Taking the TCU052 and EI Centro wave which have different characteristics as the input of bridge tower, first to carry out the modal analysis of bridge tower structure, get various order of modal frequency of the bridge tower, then analyses the displacement response of the top of bridge tower in the bridge direction, the results showed that, under the pulse type seismic action the displacement response of bridge tower of large span cable-stayed bridge are increased.

Seismic Response Analysis of Cable-Stayed Bridge Tower which Does Not Consider the Pile-Soil Interaction (II)

2012 ◽  
Vol 461 ◽  
pp. 611-614
Author(s):  
Li Na Zhang ◽  
Feng Chen Li ◽  
Ou Yang ◽  
Cai Hua Wang ◽  
Jin Wang
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Seismic Action ◽  
Seismic Response Analysis ◽  
Displacement Response ◽  
Finite Element Software ◽  
Cable Stayed Bridge ◽  
Tower Structure ◽  
Different Characteristics ◽  
Bridge Tower

For the problem of analysis of earthquake response of cable-stayed tower bridge, the foundation is given as the rigid consolidation, do not consider the interaction of soil and structure, the finite element software ABAQUS is used for seismic response analysis. Taking the TCU052 and EI Centro wave which have different characteristics as the input of bridge tower, first to carry out the modal analysis of bridge tower structure, get various order of modal frequency of the bridge tower, then analyses the displacement response of the top of bridge tower in the bridge direction, the results showed that, under the pulse type seismic action the displacement response of bridge tower of large span cable-stayed bridge are increased.

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