2 Transmost, St. Petersburg, Russia
3 JSC Research Center of Construction, Moscow, Russia
4 China University of Petroleum, Qingdao, China
Abstract. The paper notes that the increase of peak acceleration of about 1.4 times proposed by seismologists in the project of seismic intensity scale reflects the undoubtedly experience of past earthquakes. However, using the suggested values of accelerations in the design codes requires modification of the codes themselves, and a differentiated approach to defining the design level of peak ground accelerations. Engineers should consider the dependence of the design peak accelerations on the oscillation period of the structure, and seismologists should differentiat the value of peak ground accelerations depending on the prevailing period of seismic input. It is noted that for the design and maximum design earthquakes the transition to a new seismic scale leads to completely different consequences. The seismic intensity of the design earthquake for mass construction objects does not exceed 7 degrees on the MSK scale, and in this area the new seismic scale differs little from the existing one. For maximum design earthquakes, peak accelerations increase substantially, but the criterion of seismic resistance is not the acceleration of the structure, but the work of plastic deformation forces. The possibility of structure destruction depends not so much on peak accelerations as on the energy characteristics of seismic input, such as Arias intensity, absolute cumulative velocity, seismic energy density. With a correct approach to calculation for performance based designing, the transition to a new scale of points will not lead to a rise in the cost of most buildings and structures. Moreover, without the use of a new scale, a transition to modern methods of performance based designing is impossible.
Keywords: earthquake, peak acceleration, seismic intensity scale, design standards, the period of oscillation
NESTEROVA Olga P. - postgraduate student, Petersburg State Transport University. 190031, Russia, St. Petersburg, Moskovsky pr., 9. Tel.: +7 (960) 280-59-75. E-mail: Neona975@yandex.ru
TKACHENKO Alexander S. - Ph.D. (Technical Sciences), docent, Petersburg State Transport University. 190031, Russia, St. Petersburg, Moskovsky pr., 9. Tel.: +7 (812) 457-82-49. E-mail: tm@pgups.ru
UZDIN Alexander M. - Doctor (Technical Sciences), professor, Petersburg State Transport University. 190031, Russia, St. Petersburg, Moskovsky pr., 9. Tel.: +7 (812) 457-82-49. E-mail: uzdin@mail.ru
DOLGAYA Angelica A. - Ph.D. (Technical Sciences), engineer, Transmost. 190013, Russia, Saint Petersburg, Podyezdnoy per., 1. Tel.: +7 (921) 992-58-99. E-mail: anzhelika-dolgaya@yandex.ru
SMIRNOVA Lyubov N. - Ph.D. (Technical Sciences), Scientific Secretary, JSC Research Center of Construction. 109428, 6, 2nd Institutskaya, Moscow. Tel.: +7 (985) 472-29-77. E-mail: lyubovsmirnova80@gmail.com
GUAN Yuhai - PhD, Deputy director of Civil engineering Department, China University of Petroleum. Qingdao, China. No. 66, Changjiang West Road, Huangdao District, Qingdao, China, 266580. E-mail: 329953890@qq.com
Cite this article as: Nesterova O.P., Tkachenko A.S., Uzdin A.M., Dolgaya A.A., Smirnova L.N., Guan Yuhai. On setting the level of seismic input in seismic intensity scales and design standards, Voprosy Inzhenernoi Seismologii (Problems of Engineering Seismology), 2018, vol. 45, no. 1, pp. 73–80. [in Russian]. DOI:10.21455/VIS2017.4-5
English translation of the article will be published in Seismic Instruments, ISSN: 0747-9239 (Print) 1934-7871 (Online), https://link.springer.com/journal/11990), 2019, Volume 55, Issue 1.