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The Response Analyse of Site Earthquake Motion on Ni’er Earthquake

Author: SongZhiYuan
Tutor: YangXiaoDong
School: Kunming University of Science and Technology
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Strong motion records Ground motion attenuation Soil dynamic response Soft sandwich
CLC: P315
Type: Master's thesis
Year: 2009
Downloads: 23
Quote: 0
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Abstract


Firstly, three-component in the China Seismological Network collected at 5:34:56 on June 3rd, 2007 Ning'er 6.4 earthquake acceleration records conducted a preliminary analysis. China Digital Strong Motion Network Yunnan Network in the seismic records, more than 20 strong motion stations recorded the earthquake ground motion. The maximum recorded peak acceleration: 431.2 cm/s2. And nearly half of the acceleration recorded fault distance is less than 100km. In this paper, the earthquake records analysis, the Ning'er to vibration attenuation model, and then use the site soil response analysis, to arrive at the ground motion theoretical value, make a theoretical support for Damage Analysis. In this paper, from the ground motion attenuation and soil dynamic response of two aspects of the following work. Ground motion attenuation, First of all, based on the strong motion records, the the Ning'er earthquake strong motion characteristics regression analysis, the earthquake fault away from the area near the PGA attenuation law, acceleration response spectra of ground motion characteristics. Taking into account the limitations of the strong motion records in the number of data due to error, it is based on seismic geological environment to ground motion distribution of observational data, Yunnan Province is divided into three zones, and can reflect the decay rate and magnitude attenuation relationship model, based on the over the years the motion records were analyzed to establish the the Ning'er ground motion attenuation relationship. In addition, taking into account the structure in the role of a strong earthquake, generally into the nonlinear seismic input energy mainly by inelastic deformation and damping of the structure to dissipate. Therefore, the energy is inelastic design structures or structures most reasonable parameters of earthquake damage assessment. Currently, energy-based design methods and theories of behavior a hot research topic in earthquake engineering. This article discusses. Engineering site is the carrier of the seismic wave propagation, seismic wave propagation characteristics in different venues there are differences, site conditions have a major impact on the propagation of seismic waves has become an accepted fact. Building structure, bulky, great quality, built in non-bedrock on the lower part of the structure dynamic interaction influencing factors can not be ignored, the structure of the input ground motion will also be greatly different from the free field . Therefore, the high-rise building structure seismic response analysis using the input ground motions need to be carefully discussed. This paper, the theoretical analysis method - the equivalent linear soil seismic response analysis method for analysis and processing. First fully elastic soil seismic response analysis, and linear soil equivalent linearization, concluded calculation block diagram. In addition, the text was soft sandwich in the soil structure Analysis summary analysis of its damage investigation on the basis of previous studies.

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CLC: > Astronomy,Earth Sciences > Geophysics > Earth ( rock circles ) physics ( geophysics ) > Seismology
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