A Redefinition of Seismic Input for Design and Assessment

Adaptive extended Kalman filter for parameter tracking of base-isolated structure under unknown seismic input

Proceedings of 2013 10th International Bhurban Conference on Applied Sciences & Technology (IBCAST) ◽

10.1109/ibcast.2013.6512135 ◽

2013 ◽

Cited By ~ 1

Author(s):

T. F. Mu ◽

L. Zhou ◽

J. N. Yang

Keyword(s):

Kalman Filter ◽

Extended Kalman Filter ◽

Seismic Input ◽

Parameter Tracking ◽

Adaptive Extended Kalman Filter

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Realistic Modeling of Seismic Input in Urban Areas: A UNESCO-IUGS-IGCP Project

Earthquake Microzoning ◽

10.1007/978-3-0348-8177-7_7 ◽

2002 ◽

pp. 2389-2406

Author(s):

G. F. Panza ◽

F. Vaccari ◽

F. Romanelli

Keyword(s):

Urban Areas ◽

Seismic Input ◽

Realistic Modeling ◽

Igcp Project

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Modification of Seismic Input for Fully Discretized Models

SOILS AND FOUNDATIONS ◽

10.3208/sandf1972.30.2_114 ◽

1990 ◽

Vol 30 (2) ◽

pp. 114-118 ◽

Cited By ~ 1

Author(s):

M.O. Al-Hunaidi ◽

Ikuo Towhata ◽

Kenji Ishihara

Keyword(s):

Seismic Input

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Response Site Analyses of 3D Homogeneous Soil Models

Emerging Science Journal ◽

10.28991/esj-2018-01148 ◽

2018 ◽

Vol 2 (5) ◽

pp. 238 ◽

Cited By ~ 12

Author(s):

Davide Forcellini ◽

Marco Tanganelli ◽

Stefania Viti

Keyword(s):

Soil Type ◽

Soil Depth ◽

Site Response ◽

Soil Layer ◽

Shear Velocity ◽

Seismic Intensity ◽

Eurocode 8 ◽

Seismic Input ◽

Homogeneous Soil ◽

Response Site

The seismic excitation at the surface can be determined through Site Response Analyses (SRA) as to account for the specific soil properties of the site. However, the obtained results are largely affected by the model choice and setting, and by the depth of the considered soil layer. This paper proposes a refined 3D analytical approach, by the application of OPENSEES platform. A preliminary analysis has been performed to check the model adequacy as regards the mesh geometry and the boundary conditions. After the model setting, a SRA has been performed on various soil profiles, differing for the shear velocity and representing the different soil classes as proposed by the Eurocode 8 (EC8). Three levels of seismic hazard have been considered. The seismic input at the bedrock has been represented consequently, through as much ensembles of seven ground motions each, spectrum-compatible to the elastic spectra provided by EC8 for the soil-type A (bedrock). Special attention has been paid to the role of the considered soil depth on the evaluation of the surface seismic input. Different values of depth have been considered for each soil type and seismic intensity, in order to check its effect on the obtained results.

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Reduction of seismic input motion through adjusting contact length of foundation side walls to surrounding medium

The Structural Design of Tall and Special Buildings ◽

10.1002/tal.1546 ◽

2018 ◽

Vol 27 (18) ◽

pp. e1546

Author(s):

Pouran Fallahzadeh Farashahi ◽

Hossein Jahankhah

Keyword(s):

Surrounding Medium ◽

Contact Length ◽

Seismic Input ◽

Side Walls ◽

Input Motion

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Are Synthetic Accelerograms Suitable for Local Seismic Response Analyses at Near-Field Sites?

Bulletin of the Seismological Society of America ◽

10.1785/0120210074 ◽

2021 ◽

Author(s):

Francesca Mancini ◽

Sebastiano D’Amico ◽

Giovanna Vessia

Keyword(s):

Seismic Response ◽

Seismic Waves ◽

Near Field ◽

Central Italy ◽

Propagation Path ◽

Soil Behavior ◽

Seismic Stations ◽

Seismic Input ◽

Local Seismic Response ◽

Finite Fault

ABSTRACT Local seismic response (LSR) studies are considerably conditioned by the seismic input features due to the nonlinear soil behavior under dynamic loading and the subsurface site conditions (e.g., mechanical properties of soils and rocks and geological setting). The selection of the most suitable seismic input is a key point in LSR. Unfortunately, few recordings data are available at seismic stations in near-field areas. Then, synthetic accelerograms can be helpful in LSR analysis in urbanized near-field territories. Synthetic accelerograms are generated by simulation procedures that consider adequately supported hypotheses about the source mechanism at the seismotectonic region and the wave propagation path toward the surface. Hereafter, mainshocks recorded accelerograms at near-field seismic stations during the 2016–2017 Central Italy seismic sequence have been compared with synthetic accelerograms calculated by an extended finite-fault ground-motion simulation algorithm code. The outcomes show that synthetic seismograms can reproduce the high-frequency content of seismic waves at near-field areas. Then, in urbanized near-field areas, synthetic accelerograms can be fruitfully used in microzonation studies.

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