Ground motion response spectra and macroseismic earthquake intensity: some statistical ratios
Abstract
Aim. Obtaining new data on the interrelations between macroseismic and physical characteristics of strong ground motions during earthquakes and improving methods for predicting possible seismic impacts in seismically active areas based on this. Relevance. According to the level of seismic hazard, the territory of the Russian Federation is divided into zones with different macroseismic intensity (in points) of earthquakes. Calculations based on these data for seismic resistance do not use the macroseismic intensity points themselves, but the corresponding physical characteristics of ground motions, such as amplitudes and reaction spectra. Therefore, the question of the adequacy of these compliances has always been of primary importance. Another reason for the permanent relevance of research conducted in this area is that the data obtained in their process is one of the main sources of fundamental knowledge about the nature of earthquakes and their impact on the environment and society. Object. The macroseismic intensity of earthquakes and the response spectra of ground motions during earthquakes and the quantitative relationships between them. Methods. A comprehensive analysis of empirical and calculated data on the levels of spectral ground motions accelerations (SA) at various fixed frequencies (f) in earthquakes of different intensities (I) and the construction of probabilistic models of the relationship between them in earthquakes of different magnitudes (M) and distances (D) on this basis. Results. For each of the 18 spectral components, logarithmically uniformly distributed over frequencies in the range 0.28–22 Hz, probabilistic estimates of SA were obtained for various combinations of M, D, and I. The corresponding probabilistic models SA(M,D,I,f) are constructed, through the analysis of which the frequencies and relevant levels of SA are identified, independent of M and D and determined only by the intensity I. These frequencies, which are different for each value of I, are called “responsible" for the macroseismic effect of this intensity. A method for determining the macroseismic intensity I from the SA(f) reaction spectrum is offered, which makes it possible to obtain more accurate estimates than traditional methods for estimating single oscillation parameters (amplitudes, periods, etc.).
References
Заалишвили В.Б., Мельков Д.А., Фидарова М.И., Харебов К.С. К вопросу пересчета сейсмической интенсивности шкалы Японского метеорологического агентства (JMA) в макросейсмическую шкалу MSK. // Геология и Геофизика Юга России. – 2024а. – Т. 14. No 1. – С. 19–35. DOI: 10.46698/VNC.2024.82.41.002.
Заалишвили В.Б., Мельков Д.А., Фидарова М.И., Шманатов Г.В. Геоэкологические аспекты формирования интенсивности землетрясения на основе инструментальных данных. // Геология и Геофизика Юга России. – 2024б. – Т. 14. No 2. – С. 45–60. DOI: 10.46698/VNC.2024.27.90.004.
Комплект карт общего сейсмического районирования территории Российской Федерации ОСР-97. Объяснительная записка и список городов и населенных пунктов, расположенных в сейсмоопасных районах. / Гл. редакторы В.Н. Страхов, В.И. Уломов. – М.: ОИФЗ РАН, 1999. – 57 с.
Медведев С.В. Инженерная сейсмология. – М.: Госстройиздат. 1962. – 284 с.
Медведев С.В. Международная шкала сейсмической интенсивности. // Сейсмическое районирование территории СССР. М.: Наука, 1968. – С. 158–162.
Опасные природные и техногенные процессы в горных регионах: модели, системы, технологии: коллективная монография. / Труды VIII Международной конференции. Владикавказ: ГФИ ВНЦ РАН, 2022. – 477 с.
Раутиан Т.Г., Халтурин В.И., Доцев Н.Т., Саргсян Н.М. Макросейсмическая магнитуда. // Вопросы инженерной сейсмологии. – 1989. – Вып. 30. «Оценка эффекта сильных землетрясений». – С. 98–110.
Сейсмическая шкала и методы измерения сейсмической интенсивности. М.: Наука, 1975. – 279 с.
Сейсмическое микрорайонирование. / Отв. редактор С.В. Медведев. – М.: Наука, 1977. – 248 с.
Чернов Ю.К. Сильные движения грунта и количественная оценка сейсмической опасности территорий. Ташкент: ФАН», 1989. – 295 с.
Чернов Ю.К. Эмпирические модели для вероятностных оценок спектров колебаний «мягких» и «твердых» грунтов при землетрясениях. // Геология и геофизика Юга России. – 2024а. – Т. 14. No 2. – С. 90–106. DOI: 10.46698/VNC.2024.27.64.007.
Чернов Ю.К. Опыт экспресс-оценок спектров реакции по спектрам Фурье ускорений колебаний грунта при землетрясениях. // Геология и геофизика Юга России. – 2024б. – Т. 14. No 4. – С. 113–127. DOI: 10.46698/VNC.2024.44.23.010.
Штейнберг В.В., Сакс М.В., Аптикаев Ф.Ф. и др. Методы оценки сейсмических воздействий (пособие). // Вопросы инженерной сейсмологии. – 1993. – Вып. 34. – С. 5–94.
Atkinson G.M., Sonley E. Empirical relationships between modified Mercalli intensity, and response spectra. // BSSA. – 2000. – Vol. 90(2). – pp. 533–544.
Caprio M., Tarigan B., Worden B, Wiemer S, Wald D.J. Ground motion to intensity conversion equations (GMICEs): A Global relationship and evaluation of regional dependency. // Bulletin of the Seismological Society of America. – 2015. – Vol. 105. No. 3. – pp. 1476–1490. DOI: 10.1785/0120140286.
Du K., Ding B., Luo H., Sun J. Relationship between peak ground acceleration, peak ground velocity, and macroseismic intensity in Western China. // Bulletin of the Seismological Society of America. – 2019. – Vol. 109. No. 1. – pp. 284–297. DOI: 10.1785/0120180216.
Nemati M. Relationships between modified Mercalli intensity and engineering ground-motion of the earthquakes in Persia. // Journal of Earthquake Engineering. – 2015. DOI: 10.1080/13632469.2015.1104751.
Sokolov V. Three techniques for estimation of Instrumental Intensity: a comparison. // In: Proceedings of the 2013 World Congress on Advances in Structural Engineering and Mechanics (ASEM13). 2013. Jeju, Korea, рр. 574–591.
Worden C.B., Gerstenberger M.C., Rhoades D.A., Wald D.J. Probabilistic relationships between ground-motion parameters and modified Mercalli intensity in California. // Bulletin of the Seismological Society of America. – 2012. – Vol. 102. No. 1. – рр. 204–221.
Yaghmaei-Sabegh S., Tsang H.H., Lam N.T.K. Conversion between peak ground motion parameters and modified Mercalli intensity values. // Journal of Earthquake Engineering. – 2011. – Vol. 15. No. 7. – рр. 1138–1155.
English
Русский
