Horizontal and vertical components of earthquake ground motions at liquefiable sites

Yang, Jun; Sato, Tadanobu; Savidis, Stavros A.; Li, X.S.

doi:10.1016/s0267-7261(02)00010-6

Cited by 41 publications

(25 citation statements)

References 17 publications

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“…As pointed out by Yang et al [36], who found similar behavior in their investigation, the propagation of the vertical motion produced almost only compression stress, which was mainly transmitted by the pore water, explaining the oscillation of pore pressure with the presence of vertical excitation. This phenomenon was also found in previous shaking table tests [37].…”

Section: Effects Of Vertical Excitationsupporting

confidence: 73%

Seismic response of large underground structures in liquefiable soils subjected to horizontal and vertical earthquake excitations

Liu

Song

2005

Computers and Geotechnics

128

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Section: Effects Of Vertical Excitationsupporting

confidence: 73%

Seismic response of large underground structures in liquefiable soils subjected to horizontal and vertical earthquake excitations

Liu

Song

2005

Computers and Geotechnics

128

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“…Although it has long been recognized that the ground is simultaneously subjected to both horizontal and vertical shakings during real earthquake, most of the studies have been only concerned with horizontal ground motion, in which site response is regarded as the consequence of the vertical propagation of shear waves in a horizontally layered system (Yang et al, 2002;Yang and Yan, 2009). As a result, vertical ground motion, as compared with its horizontal counterpart, has received less attention.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of deep soft soil deposits under multidirectional earthquake loading

Chen

Gao

Yang

2011

Engineering Geology

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“…The transformation of vertical motions in the deposit differs considerably from the transformation of horizontal motions. Both the amplitude and frequency content of the horizontal motions are strongly dependent on the shaking level or the associated soil behaviour (Yang & Sato, 2002). Therefore, more research is required regarding earthquake ground motion in order to gain more knowledge of the effects of earthquakes on structures.…”

Section: Synthetic Ground Motion Time Historiesmentioning

confidence: 99%

Behaviour of integral bridges under vertical and horizontal earthquake ground motion

Masrilayanti¹,

Weekes²

2014

Bridge Maintenance, Safety, Management and Life Extension

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Integral bridges are monolithic and are known to possess good earthquake resistance when founded on a stable soil. One important consideration is the relative displacements which can occur at the support points on structures where there is significant spacing between, i.e. bridges. Factors such as soil, foundation types etc. can all influence the dynamic response, and the stiffness of the bridge can influence how relative displacements affect the internal force actions within the structure. In this study, the effect of earthquakes on integral bridges built on several different soil types is examined, through computer simulation of an integral abutment bridge. The study is made based on Eurocode 8 recommendations, which provides data for different types of soil to be used for earthquake analysis. A symmetrical medium length integral bridge obtained from an existing structure is used for the analysis. Artificial EC8 spectrum compatible time histories (with a 0.35 g peak ground acceleration) are applied to the structure for a range of soil stiffnesses. In conjunction with this, both static and dynamic relative displacement studies are carried out to develop insight as to the significance or dominance of either dynamic or relative displacement effects.The final aim of this study is to propose a simplified approach for design/appraisal which can allow predictions of dynamic response based on the results of static relative displacement studies coupled with simple computer models, without having to resort to full nonlinear integration time-history analysis. Synthetic time histories for 5 different types of soil were created using Mathcad. The synthetic acceleration time history was validated using Seismospect (by Seismosoft). The time histories were then used to carry our full integration time history analyses in ANSYS (engineering simulation software) to simulate the dynamic response of the bridge.The results show that relative displacements play an important role in overall structural response of the integral bridge, compared to the pure dynamic response. The results also confirm that lower stiffness soils suffer a more detrimental effect of the earthquake compared to a soil of higher stiffness.

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Horizontal and vertical components of earthquake ground motions at liquefiable sites

Cited by 41 publications

References 17 publications

Seismic response of large underground structures in liquefiable soils subjected to horizontal and vertical earthquake excitations

Seismic response of large underground structures in liquefiable soils subjected to horizontal and vertical earthquake excitations

Dynamic response of deep soft soil deposits under multidirectional earthquake loading

Behaviour of integral bridges under vertical and horizontal earthquake ground motion

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