Soil Response Considerations in Seismic Design of Offshore Platforms

1975 ◽  
Author(s):  
L.M. Idriss ◽  
R.M. Dobry ◽  
M.S. Power
Keyword(s):  
Seismic Design ◽  
Offshore Platforms ◽  
Soil Response

Soil-Response Considerations in Seismic Design of Offshore Platforms

1976 ◽  
Vol 28 (03) ◽  
pp. 244-252
Author(s):  
I.M. Idriss ◽  
R. Dobry ◽  
M.S. Power
Keyword(s):  
Seismic Design ◽  
Offshore Platforms ◽  
Soil Response

Period Dependence of Response Spectrum Damping Modification Factors due to Source- and Site-Specific Effects

2015 ◽  
Vol 31 (2) ◽  
pp. 745-759 ◽  
Author(s):  
Brendon A. Bradley
Keyword(s):  
Seismic Design ◽  
Response Spectrum ◽  
Response Spectra ◽  
Empirical Formulas ◽  
Site Specific ◽  
Soil Response ◽  
Specific Effects ◽  
Spectral Peaks ◽  
Displacement Based ◽  
Displacement Based Seismic Design

Response spectrum damping modification factors are key components of displacement-based seismic design methods. This paper examines the period dependence of damping modification factors as a result of near-source forward directivity, basin-induced surface waves, and surficial soil response by using recorded ground motions from the Canterbury, New Zealand, earthquakes as examples. It is illustrated that spectral peaks in the 5% damped response spectra have systematically different damping modification factors than those suggested by conventional empirical formulas; this is also supported by arguments based on forced vibration theory. Because source- and site-specific effects are increasingly being considered in the development of region- or site-specific design response spectra, this work illustrates the critical need to adequately consider adjustments to damping modification factors to ensure that displacement-based seismic design procedures remain consistent.

A preliminary study on seismic design criteria of offshore platforms in Bohai Sea of China

2010 ◽  
Vol 9 (2) ◽  
pp. 223-231
Author(s):  
Yanju Peng ◽  
Yuejun Lu ◽  
Jiaquan Yan ◽  
Rongyu Tang ◽  
Junqin Wang ◽  
...  
Keyword(s):  
Seismic Design ◽  
Bohai Sea ◽  
Design Criteria ◽  
Offshore Platforms ◽  
Preliminary Study ◽  
Bohai Sea Of China

Up-to-Date of Seismic Design Spectrum for Offshore Platforms at the Bay of Campeche

2003 ◽  
Author(s):  
Joel A. Garci´a Vargas ◽  
Roberto Pe´rez Marti´nez
Keyword(s):  
Seismic Hazard ◽  
Seismic Design ◽  
Soil Conditions ◽  
Reserve Capacity ◽  
Seismic Action ◽  
Offshore Platforms ◽  
Local Conditions ◽  
Design Spectrum ◽  
Earthquake Sources ◽  
Local Soil

This paper presents the procedure proposed by the ISO code adapted to the local conditions in the Bay of Campeche, Mexico in order to obtain design spectrum for different seismic reserve capacity factors. A probabilistic seismic hazard analyses is used in order to determine the uniform hazard spectrum where the seismic environment, according to previous researches, is influenced by three primary types of earthquake sources: the subduction zone on the western pacific coast of Mexico, the lithospheric slab within the central portion of Mexico and the trans-mexican volcanic belt. This earthquake spatial distribution can be shown trough the historic catalog of earthquake occurrences during the period 1900–2001 used. On the one hand, in the evaluation of the characteristics and the uncertainties associated with the earthquake sources and their effects on the interest sites, are taken into account the characterization of the earthquake sources, the effect of the seismic wave propagation, the local conditions and the soil-structure interaction developed during earthquake ground motions. On the other hand, the uncertainties on the seismic hazard curve and those associated with the platform behavior (mass, stiffness, damping) in which their values are assigned to be consistent with the ISO 19901-2 and ISO 19902 seismic code suggestions. The final result consists in a seismic design spectrum for offshore platforms at the Bay of Campeche, which are consistent with the recommended ISO 19902 seismic reserve capacity factors, modified for local soil conditions, following a detailed seismic-action procedure.

Soil Response during Globally Drained and Undrained Freeze–Thaw Cycles under Deviatoric Loading

2021 ◽  
Vol 147 (2) ◽  
pp. 06020030
Author(s):  
Sang Yeob Kim ◽  
Junghee Park ◽  
Wonjun Cha ◽  
Jong-Sub Lee ◽  
J. Carlos Santamarina
Keyword(s):  
Soil Response ◽  
Freeze Thaw

Seismic Design Methodology for Precast Concrete Diaphragms Part 2: Research Program

PCI Journal ◽  
2005 ◽  
Vol 50 (6) ◽  
pp. 14-31 ◽  
Author(s):  
Robert B. Fleischman ◽  
S.K. Ghosh ◽  
Clay J. Naito ◽  
Ge Wan ◽  
José Restrepo ◽  
...  
Keyword(s):  
Seismic Design ◽  
Research Program ◽  
Design Methodology ◽  
Precast Concrete
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