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Adjustment Method of Matching Near-fault Artificial Seismic Waves and Canonical Response Spectrum

An adjustment method and response spectrum technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of poor matching between artificial seismic waves and standard response spectra, complex matching process, large errors, etc., to achieve optimal bridge design ability, accurate simulation results, and extended service life

Active Publication Date: 2020-06-30
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a near-fault artificial seismic wave with poor matching degree, large error, complicated matching process and low efficiency, etc. The adjustment method of seismic wave and standard response spectrum matching, in order to realize above-mentioned invention object, the present invention provides following technical scheme:

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  • Adjustment Method of Matching Near-fault Artificial Seismic Waves and Canonical Response Spectrum
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  • Adjustment Method of Matching Near-fault Artificial Seismic Waves and Canonical Response Spectrum

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Embodiment 1

[0022] An adjustment method for matching near-fault artificial seismic waves with standard response spectra, comprising the following steps:

[0023] (1) Select the velocity shock pulse wave function and the far-field seismic power spectrum function to obtain the time history function, and then multiply it by the envelope function to generate the first seismic wave with near-fault effect;

[0024] (2) Carry out wavelet decomposition on the generated first seismic wave, obtain the coefficient and corresponding wavelet component of each layer of the first seismic wave through Volterra series expansion, and establish the matching between the time history function of the first seismic wave and its calculated response spectrum Non-linear coefficient relationship;

[0025] (3) Comparing the calculated response spectrum of the obtained first seismic wave with the standard response spectrum, and obtaining the error index between the calculated response spectrum and the standard respon...

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Abstract

The invention provides an adjustment method for matching of near-fault artificial seismic waves and a standard reaction spectrum. A calculation reaction spectrum is unfolded and decomposed into multiple layers, an optimized algorithm is used to carry out adjustment and wavelet reconstruction on coefficients which need adjusting, the standard reaction spectrum is matched rapidly in high efficiency,the calculation reaction spectrum matches the standard reaction spectrum more, and the Volterra level is zoomed in / out to improve the matching precision and calculation efficiency. Anti-seismic analysis can be carried out on an engineering structure, analysis on the anti-seismic design and structural power is more accurate and effective, a bridge design capability is optimized, a bridge safety coefficient is improved, the service life is prolonged, damage after seismic is reduced, maintenance cost after seismic is reduced, the matching difficulty is reduced greatly, guidance is provided for anti-seismic design of engineering building structures and the bridge structures, design of the engineering structure especially the bridge structure is optimized, and the design efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of artificial seismic wave synthesis, in particular to an adjustment method for matching near-fault artificial seismic waves with standard response spectra. Background technique [0002] Near-fault ground motion is the most complex type of ground motion. It has a significant vertical acceleration component, and the horizontal component has a strong directional effect of fault rupture. The peak values ​​of acceleration, velocity, and displacement differ greatly. The ratio of the horizontal peak acceleration is far greater than the ratio of the far-field vibration, and its velocity time history is in the form of a strong pulse with a large value, a long period, and a short duration, which will cause great damage to the engineering structure. In seismic analysis, it is necessary to consider near-fault effects. [0003] In the prior art, due to the limited number of actual near-fault seismic records, especially...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/50
Inventor 曾永平陈克坚董俊樊启武庞林郑晓龙杨国静陶奇苏延文徐昕宇周川江颜永逸
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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