Site dependent spectra for earthquake resistant design 22F, 4T, 9R

Seed, H. Bolton; Ugas, Celso

doi:10.1016/0148-9062(76)90025-5

Cited by 50 publications

(97 citation statements)

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“…They indicated that a systematic overprediction is found for distances less than 50 km and concluded that, depending on the site and the level of strong ground motion, nonlinear effects become significant in the acceleration range 100-300 gal. The lower limit agrees with the acceleration level on bedrock proposed by Seed et al (1976) as roughly the boundary between amplification and deamplification of seismic waves by the surface layers.…”

Section: Effects Of Soil Nonlinearitysupporting

confidence: 87%

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Strong Motion Seismology in Japan.

1995

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This paper reviews strong motion seismology in Japan. It describes advances in strong motion seismology in the last decade, the current state of the art, and unresolved issues in the following areas: (1) Observation and data processing of strong ground motion, (2) Local site effects, and (3) Simulation and prediction of strong ground motion. In the first area, it reviews the current state of strong motion observation and data processing: fundamental subjects in strong motion seismology. In the next area, it describes empirical evaluations of site amplification factors, effects of soil nonlinearity, effects of topographical and subsurface irregularity, and application of microtremors. In the last area, it summarizes the results of empirical, semi-empirical, and numerical techniques for the simulation and the prediction of strong ground motions due to actual earthquakes. Finally, future directions of research are suggested, based on the current state of the art in strong motion seismology.

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Section: Effects Of Soil Nonlinearitysupporting

confidence: 87%

“…The state of knowledge on amplification and deamplification of ground motion in terms of peak acceleration has been summarized by Seed et al (1976). According to their results, deamplification of peak accelerations at soft clay sites begins at about 100 gal at rock site and becomes significant at 300 gal.…”

Section: Effects Of Soil Nonlinearitymentioning

confidence: 99%

Strong Motion Seismology in Japan.

1995

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“…The floor masses were lumped as usual at the floor levels. To obtain the thickness of the plane stress elements, the combined stiffness of the building that is lateral load resisting elements was stimulated by an equivalent structural wall (Lysmer et al, 1996;Seed et al, 1976). Model 1b, 1c, and 2 were analyzed by program GEMAS.…”

Section: Introductory Studiesmentioning

confidence: 99%

Study of Soil-Structure-Structure Interaction on Earthquake Response with Different Foundation Arrangement

Kim¹

2014

Journal of Korean Society of Hazard Mitigation

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“…Seed et al (1976) presentan espectros normalizados de ciento cuatro registros y los clasifican según cuatro condiciones de suelo, para el oeste de los Estados Unidos. Dobry et al (1978) comparan dos registros del Terremoto de San Fernando en 1971 (Estados Unidos), a una misma distancia, pero en condiciones de suelo diferente, estos exhiben un comportamiento similar en los primeros 14 s, sin embargo el registro en roca disminuye su intensidad, mientras que el de suelo continua otros 14 s.…”

Section: Introduccionunclassified

Mapa de amplificacion sismica del Valle Central, Costa Rica

ERD

Chacón

2011

Rev. Geol. Amér. Central

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Seismic amplification consist of a modification of the seismic signal when it travels from rock to soil strata. This causes variations in the amplitude and the frequency content of the signal when it reaches the surface. This effect tends to cause a variation in the intensity with a possible increase in damage to infrastructure. To evaluate the degree of seismical signal amplification hazard a combination of the following maps is used: -Surface geology -Earthquake generating sources -Peaks of registered intensities -Natural period of the soil -Maximum possible peak acceleration, velocity and displacementThe map presented allows the calculation of high, medium and low relative hazard in conjunction with other ingineering parameters. Finally, the hazard map is compared with the urban development map, where a coincidence between the areas of larger residential growth and the areas with higher level of hazard of seismic amplification is observed. RESUMEN:La amplificación sísmica consiste en una modificación de la señal sísmica, cuando viaja de la roca hacia el suelo. Esto causa variaciones en la amplitud y en el contenido de frecuencias de la señal en la superficie. Ese efecto tiende a causar una variación de la intensidad con un posible aumento en los daños a la infraestructura. Para evaluar el grado de amenaza de amplificación sísmica se combinan una serie de mapas que incluyen: -Geología superficial -Fuentes generadoras de sismos -Intensidades máximas registradas -Período naturales del suelo -Aceleración, velocidad y desplazamiento máximos posibles El mapa presentado permite obtener una amenaza relativa alta, media y baja en conjunto con algunos parámetros ingenieriles. Finalmente se compara el mapa de amenaza con el de desarrollo urbano, donde se observa una coincidencia de las áreas de mayor crecimiento residencial con el nivel mas alto de amenaza de amplificación sísmica.

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Site dependent spectra for earthquake resistant design 22F, 4T, 9R

Cited by 50 publications

References 0 publications

Strong Motion Seismology in Japan.

Strong Motion Seismology in Japan.

Study of Soil-Structure-Structure Interaction on Earthquake Response with Different Foundation Arrangement

Mapa de amplificacion sismica del Valle Central, Costa Rica

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