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The Importance of Design Spectra and site class for the Design of High-Rise Buildings

Journal of Civil Engineering and Architecture 2021年第6期15卷 294-299页

作者： Anjeza Gjini Hektor Cullufi Altin Bidaj Enio Deneko Faculty of Civil Engineering Polytechnic University of TiranaTiranaAlbania

On November 26,2019 a strong earthquake of magnitude M6.4 occurred close to the City of Durrës,Albania(15.6 km WSW(west southwest)of Mamurras and 22 km SSW(south southwest)of Durrës),causing fatalities and considerable damages in many *** this article we present and analyze,by means of observational data and numerical simulation,the behavior under this earthquake of an 8-floor RC(reinforcement concrete)building,by using design spectra referring to KTP-N.2-89 and Eurocode *** main purpose of the authors is to better understand and evaluate the seismic performance of high-rise buildings under the design spectra with a period of soil oscillation close to the fundamental period of the structure.

关键词： 2019 earthquake Durrës design spectra site class structural damage.

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A simulation-based nonlinear site amplification model for ground-motion prediction equations in Japan

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Earthquake Engineering and Engineering Vibration 2021年第4期20卷 843-862页

作者： Ruibin Hou John Xingquan Zhao School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of Building Structural Retrofitting and Underground Space Engineering Ministry of EducationShandong Jianzhu UniversityJi′nan 250101China

In this manuscript we present a nonlinear site amplification model for ground-motion prediction equations(GMPEs)in Japan,using a site period-based site class and a site impedance ratio as site *** used a large number of shear-wave velocity profiles from the Kiban-Kyoshin network(KiK-net)and the Kyoshin network(K-NET)to construct the one-dimensional(1D)numerical *** strong-motion records from rock-sites in Japan with different earthquake categories and taken from the Pacific Earthquake Engineering Research Center dataset were used in this *** fit a set of 1D site amplification models using the spectral amplification ratios derived from 1D equivalent linear *** of site impedance ratios for both linear and nonlinear site response were included in the 1D *** 1D model could be implemented into GMPEs using a new proposed adjustment *** adjusted site amplification ratios retain the nonlinear characteristics of the 1D model for strong motions and match the linear amplification ratio in GMPE for weak *** nonlinearity of the present site model is reasonably similar to that of the historical models,and the present site model could satisfactorily capture the nonlinear site response in empirical data.

关键词： nonlinear site amplification model ground-motion prediction equations site class site impedance ratio site response analysis

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On the Disadvantages of the NEHRP Soil classification

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Open Journal of Earthquake Research 2021年第1期10卷 1-15页

作者： Alexander Stepanovich Aleshin Institute of Physics of the Earth Russian Academy of Sciences Moscow Russia

The study of the relationship of local ground conditions with the parameters of seismic vibrations carried out by the section of engineering seismology called seismic microzonation. In this branch of applied science radical changes have taken place at the end of the last century. The Commission on Seismic Safety of the National Institute of Building Sciences of the United States has developed new recommendations, which are significantly different from all that used in the world practice of anti-seismic construction. The main provisions of this NEHRP (National Earthquake Hazards Reduction Program) classification adopted in many national building codes, including Eurocode 8. At the same time, a number of papers appeared in subsequent years criticizing the use of the NEHRP soil classification. This article examines in detail and, most importantly, comprehensively the shortcomings of the NEHRP classification.

关键词： Seismic site Properties classification site class

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