A Construction Method of Blasting Seismic Wave Model Based on Equivalent Seismic Response of Buildings

Abstract

The invention discloses a blasting seismic wave model construction method based on building seismic response equivalence. The blasting seismic wave model construction method comprises the steps of: selecting an actually measured blasting seismic wave velocity signal as a signal to be simulated; converting the blasting seismic wave velocity signal into an acceleration signal; calculating a structural response of a building structural analysis object under the action of an acceleration load, and recording an amplitude value of a top layer velocity response; subjecting the blasting seismic wave velocity signal to multiresolution wavelet decomposition and reconstruction, and determining main frequencies and amplitude values of reconstructed subsignals with an energy ratio reaching 10% or more;constructing a blasting seismic wave model of the signal to be simulated; adopting the same time-history analysis method to calculate a specific value of a when the value equals the top layer velocity response amplitude value; and substituting the calculated specific a value into the constructed model to obtain a specific expression of a blasting seismic wave analog signal based on building seismic response equivalence. The obtained blasting seismic wave model has property parameters of the actually measured waveform, and can be applied to the study of a blasting seismic effect mechanism.

Description

Technical field [0001] The invention belongs to the field of blasting seismic effect evaluation and engineering structure seismic resistance, and in particular relates to a blasting seismic wave model construction method based on the equivalent of the seismic response of a building. Background technique [0002] When the blasting seismic wave signal is used as a dynamic load input to study the mechanism of the seismic effect of blasting seismic waves on engineering structures, there are usually two forms: measured blasting seismic waves and artificial blasting seismic waves. Due to the discreteness and randomness of the measured blasting seismic wave signals, the regularity of the blasting seismic effect results based on the numerical analysis method is not obvious, and it is difficult to derive the structural dynamic equation related to the blasting seismic effect mechanism, so it is generally impossible to find specific problems. Analytical solution. Although the blasting seis...

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Problems solved by technology

Due to the discreteness and randomness of the measured blasting seismic wave signal, the regularity of the blasting seismic effect solution based on the numerical analysis method is not obvious, and it is difficult to deduce the structural dynamic equation related to the blasting seismic effect mechanism, so it is generally impossible to find out the corresponding problem. analytical solution of

Although the blasting seismic wave simulation signal can be artificially synthesized waveforms with different main characteristic parameters such as main frequency, amplitude, and duration according to the expected conditions, even if the synthesized blasting seismic wave signals are highly similar in characteristic parameters and shapes, the results obtained after loading into a specific structure The amplitude of the output seismic response of the structure is quite different

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