scholarly journals EVALUATION OF CHARACTERISTICS OF SPATIAL VARIATION OF GROUND MOTION AT ADJACENT POINTS BASED ON SCATTERING THEORY

2022 ◽  
Vol 87 (791) ◽  
pp. 49-59
Author(s):  
Ryoichi TOKUMITSU ◽  
Yu YAMAMOTO ◽  
Yasuo UCHIYAMA ◽  
Susumu OHNO
Keyword(s):  
Spatial Variation ◽  
Ground Motion ◽  
Scattering Theory

scholarly journals Influence of Multiple-Support Excitation on Seismic Response of Reinforced Concrete Arch Bridges

2019 ◽  
Vol 10 (1) ◽  
pp. 17 ◽  
Author(s):  
Marta Savor Novak ◽  
Damir Lazarevic ◽  
Josip Atalic ◽  
Mario Uros
Keyword(s):  
Reinforced Concrete ◽  
Spatial Variation ◽  
Seismic Response ◽  
Ground Motion ◽  
Seismic Analysis ◽  
Numerical Study ◽  
Relative Significance ◽  
Multiple Support ◽  
Arch Bridges ◽  
Support Excitation

Although post-earthquake observations identified spatial variation of ground motion (i.e., multiple-support excitation) as a frequent cause of the unfavorable response of long-span bridges, this phenomenon is often not taken into account in seismic design to simplify the calculation procedure. This study investigates the influence of multiple-support excitation accounting for coherency loss and wave-passage effects on the seismic response of reinforced concrete deck arch bridges of long spans founded on rock sites. Parametric numerical study was conducted using the time-history method, the response spectrum method, and a simplified procedure according to the European seismic standards. Results showed that multiple-support excitation had a detrimental influence on response of almost all analyzed bridges regardless of considered arch span. Both considered spatial variation effects, acting separately or simultaneously, proved to be very important, with their relative significance depending on the response values and arch locations analyzed and seismic records used. Therefore, it is suggested that all spatially variable ground-motion effects are taken into account in seismic analysis of similar bridges.

Parameters Observation of Spatial Variation Ground Motion

2009 ◽  
pp. 309-317 ◽  
Author(s):  
Yanli Shen ◽  
Qingshan Yang ◽  
Lingyan Xuan
Keyword(s):  
Spatial Variation ◽  
Ground Motion

Response of Long-Span Concrete Filled Steel Tubular Arch Bridge Subjected to Spatially Varying Ground Motion

2011 ◽  
Vol 243-249 ◽  
pp. 1512-1517
Author(s):  
Zhong Quan Zou ◽  
Li Ping Zhou ◽  
Guo Jing He
Keyword(s):  
Wave Propagation ◽  
Spatial Variation ◽  
Ground Motion ◽  
Dynamic Equilibrium ◽  
Time History ◽  
Correlation Effect ◽  
Arch Bridge ◽  
Spatially Correlated ◽  
Long Span ◽  
Wave Passage

The responses of a long span concrete filled steel tubular (CFST) arch bridge subjected to spatially correlated ground motion are analyzed. By using the stochastic vibration method, the time history of ground motion on the bridge site is simulated. The influences of spatial variation of the ground motion, such as uniform excitation, wave passage effect and partial correlation effect on seismic responses are studied based on the dynamic equilibrium equation for multi-support excitations. The calculated results show that the wave propagation influences the internal forces of the arch significantly. The effect of partial coherency is more complex compared to that of the wave propagation, yet it can be neither neglected. For long-span CFST arch bridges, it is critical to consider the effects of the spatial variation of ground motion.

Detailed Spatial Variation of Short-Period Earthquake Ground Motion in the vicinity of Tachikawa-Fault

2015 ◽  
Author(s):  
Seiji Tsuno ◽  
Kosuke Chimoto ◽  
Koichiro Saguchi ◽  
Hiroaki Sato ◽  
Shinichi Matsushima ◽  
...  
Keyword(s):  
Spatial Variation ◽  
Ground Motion ◽  
Earthquake Ground Motion ◽  
Short Period

Spatial variation of ground motion due to lateral heterogeneity

1991 ◽  
Vol 10 (1-3) ◽  
pp. 53-77 ◽  
Author(s):  
M.Nafi Toksöz ◽  
Anton M. Dainty ◽  
E.E. Charrette
Keyword(s):  
Spatial Variation ◽  
Ground Motion ◽  
Lateral Heterogeneity
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