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Amplification and Earthquake Response Analysis of High-rise Building

Author: ZhangYan
Tutor: SunJingJiang
School: China Seismological Bureau, Institute of Engineering Mechanics
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Senior schedule analysis Response spectrum Shear wall Finite Element Story drift
CLC: TU973.31
Type: Master's thesis
Year: 2011
Downloads: 74
Quote: 0
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Abstract

The growing number of high-rise buildings, the actual earthquake damage showed that, even far from the epicenter of the region, senior strong reaction, causing greater panic. In general, seismic response With Floors increased gradually increase. Seismic intensity scale in China mentioned the obvious: Master the high-rise feeling than the ground on the interior feel, but it does not clear the specific degree of enlargement and law. Computational analysis of six typical concrete high-rise structure, contrast the different site conditions and highly structured earthquake amplification, and come to a specific degree of enlargement and law. People on such high-level, where the layer of reaction, to determine the actual intensity, to reduce the high-rise on the people of the earthquake panic. Shear walls is commonly used by high-rise structure lateral force resisting members, Shear Walls nonlinear numerical simulation problem, however, has not been a good solution, this paper attempts using shell elements to establish a numerical model of shear wall structure, and with the experimental results contrast to verify its reliability. The main content of this paper and conclusions are as follows: 1, to study different site conditions and different height structure of ground motion amplification relations and law, choose to fully reflect the typical high-rise and high-rise buildings, six buildings, analysis The results show that: the weak senior on hard venues reaction obvious floors amplification; the senior top floors reaction medium venue more obvious, put about 20 layers of top-level of about 1.4 to 2.6 times put about 2.8, about a 40-story high-rise top floor times; most high-rise buildings on the reaction in the soft sites, particularly evident floors amplification, around a 20-storey structure top-level amplification of about 2.7 to 3.2 times, about 40 layers knot top-level amplification of approximately 3.9 times. Senior Exalted earthquake perception calculated on each floor of the six senior acceleration response spectra Floor Response Spectra two distinct peaks band, respectively, corresponding to vibration cycle excellence and structural natural periods. Medical research and structural dynamic experiments show that the various activities of the human cycle is generally concentrated in the 0.33 ~ 1s, corresponding floor response spectra values ??in this section, with the structural floor height increase, and therefore the more to the feeling of the senior people at the top of the more strongly. 3, for discuss senior Master of feeling macroeconomic performance, the calculated peak acceleration of the six high-rise floors, with reference to the Chinese seismic intensity scale of human feeling and the corresponding level of the ground vibration peak acceleration relationship, the results show that: the hard grounds The basic feeling of the senior people at the top of the ground when the actual intensity of people feeling the same; moderate venue than the actual intensity of about 20 layers large degrees, about 40 layers than the actual intensity, 1 to 2 degrees; soft sites 20 layer about 1 to 2 degrees larger than the actual intensity of about 40 layers than the actual intensity of about 2 degrees Celsius. Based on these relationships, when the earthquake, according to their own feeling of the corresponding intensity scale human feeling, a reasonable estimate of earthquake size, thereby reducing the high-level people unnecessary psychological panic. 4, in order to verify that the shell element in the establishment of the shear wall numerical model and its feasibility in the shear walls nonlinear seismic response analysis. In this paper, ABAQUS shell element to establish wall model and nonlinear analysis, numerical simulation results in good agreement with the experimental results show that the model is more reasonable. The same modeling principle of reinforced concrete shear wall structure to meet the specification of the layer between the displacement angle of 1/120 limit requirements under strong earthquakes. The calculation results can be of use for research and engineering staff.

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CLC: > Industrial Technology > Building Science > High-rise buildings > Tall Building Structures > A variety of structural design > Seismic Design
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