Blasting seismic wave model construction method based on building seismic response equivalence

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 fields of blasting seismic effect evaluation and engineering structure anti-seismic, in particular to a method for constructing a blasting seismic wave model based on the equivalent seismic response of buildings. Background technique [0002] When blasting seismic wave signals are used as dynamic load input to study the mechanism of seismic effect of blasting seismic waves on engineering structures, there are usually two forms: measured blasting seismic waves and artificially simulated blasting seismic waves. 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. analytical solution of . Although the blasting seismic wave simulation signal can be artificially synthesized wave...

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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. 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 resulting blasting seismic wave signal after being loaded into a specific structure The amplitude of the output seismic response of the structure is quite different

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