Seismic Response Analysis of Transmission Tower-Line System on a Heterogeneous Site to Multi-Component Spatial Ground Motions

A parametric study of nonlinear seismic response analysis of transmission line structures subjected to earthquake loading is studied in this paper. The transmission lines are modeled by cable element which accounts for the nonlinearity of the cable based on a real project. Nonuniform ground motions are generated using a stochastic approach based on random vibration analysis. The effects of multicomponent ground motions, correlations among multicomponent ground motions, wave travel, coherency loss, and local site on the responses of the cables are investigated using nonlinear time history analysis method, respectively. The results show the multicomponent seismic excitations should be considered, but the correlations among multicomponent ground motions could be neglected. The wave passage effect has a significant influence on the responses of the cables. The change of the degree of coherency loss has little influence on the response of the cables, but the responses of the cables are affected significantly by the effect of coherency loss. The responses of the cables change little with the degree of the difference of site condition changing. The effect of multicomponent ground motions, wave passage, coherency loss, and local site should be considered for the seismic design of the transmission line structures.

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Seismic response analysis of high-pier long-span continuous rigid-frame bridges under far-field long-period ground motions

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/638/1/012072 ◽

2021 ◽

Vol 638 (1) ◽

pp. 012072

Author(s):

Wang Yanan ◽

Tang Guangwu ◽

Liu Haiming ◽

Liu Yonghui ◽

Peng Bin

Keyword(s):

Seismic Response ◽

Ground Motions ◽

Response Analysis ◽

Far Field ◽

Seismic Response Analysis ◽

Long Period ◽

Long Span ◽

Rigid Frame ◽

High Pier

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Seismic response analysis under longitudinal and lateral excitation of rigid frame bridge subjected to near-fault pulse-like ground motions

2011 International Conference on Multimedia Technology ◽

10.1109/icmt.2011.6002844 ◽

2011 ◽

Author(s):

Linchun Zhang

Keyword(s):

Seismic Response ◽

Ground Motions ◽

Response Analysis ◽

Seismic Response Analysis ◽

Near Fault ◽

Rigid Frame ◽

Rigid Frame Bridge ◽

Lateral Excitation

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

Shock and Vibration ◽

10.1155/2020/3063402 ◽

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.

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