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Structural seismic capacity evaluation method considering influence of initial damage state

An initial damage and state technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of not considering the initial damage state and the low accuracy of the structure's seismic capacity, and achieve improved accuracy and improved accuracy Effect

Active Publication Date: 2019-10-15
HARBIN INST OF TECH
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the initial damage state is not considered in the current research on the anti-seismic ability of structures, which leads to the low accuracy of the evaluation of the anti-seismic ability of structures after the main earthquake

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  • Structural seismic capacity evaluation method considering influence of initial damage state
  • Structural seismic capacity evaluation method considering influence of initial damage state
  • Structural seismic capacity evaluation method considering influence of initial damage state

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specific Embodiment approach 1

[0024] Specific implementation mode one: as figure 1 As shown, a method for evaluating the seismic capacity of a structure considering the influence of the initial damage state described in this embodiment includes the following steps:

[0025] Step 1. Initially select M ground motion sequences from the PEER (Pacific Earthquake Engineering Research Center, Pacific Earthquake Engineering Research Center) ground motion database, and then perform spectral matching on the M ground motion sequences selected initially and the design spectrum to obtain Selected M 0 Earthquake sequence;

[0026] The conditions to be satisfied for the initially selected M ground motion sequences are as follows: (1) the magnitudes of the main shock and aftershocks are both greater than 5.0; (2) the peak acceleration PGA of the main shock and aftershocks is greater than or equal to 0.1g; Aftershocks are recorded at the same station, and the station is located in a free field; (4) The shear wave velocit...

specific Embodiment approach 2

[0045] Specific embodiment two: the difference between this embodiment and specific embodiment one is that: the peak acceleration of the aftershocks in each selected earthquake sequence is all sequentially modulated from PGA1 to PGAn, wherein: the amplitude of each amplitude modulation is 0.1g.

specific Embodiment approach 3

[0046] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the peak acceleration of the main shock in each of the selected earthquake sequences is sequentially modulated from PGA2 to PGAn, wherein: the amplitude of each amplitude modulation is equal to is 0.1g, and the increase of PGA2 relative to PGA1 is 0.1g.

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Abstract

The invention discloses a structural seismic capacity evaluation method considering the influence of an initial damage state, and belongs to the technical field of structural seismic safety evaluation. According to the method, the problem that the accuracy of evaluating the seismic capacity of the structure after the main earthquake is low due to the fact that the initial damage state is not considered in existing research on the seismic capacity of the structure is solved. According to the method, the influence of initial damage on the seismic capacity of the structure can be effectively considered; the shock resistance of the structures with different damage degrees can be reflected by selecting the data obtained by IDA analysis; a two-dimensional limit state equation of the structure can be obtained by performing regression analysis on the screened data, and the equation can effectively consider the correlation between the initial damage degree and the residual earthquake resistance, so that the accuracy of evaluating the earthquake resistance of the structure after the main earthquake is improved. The method can be applied to the technical field of structural anti-seismic safety assessment.

Description

technical field [0001] The invention belongs to the technical field of structure anti-seismic safety evaluation, and in particular relates to a structure anti-seismic capability evaluation method considering the influence of the initial damage state. Background technique [0002] During an earthquake event, the mainshock is usually followed by multiple aftershocks. In earthquake events such as the Northridge earthquake in 1994 and the Tohoku earthquake in 2011, structures were only slightly damaged by the main shock, but many slightly damaged structures were severely damaged or even collapsed under the subsequent aftershocks of lower intensity . This is mainly because the damage of the main shock significantly reduces the mechanical properties of the structure, which makes the damaged structure have a lower seismic capacity in aftershock events. However, only a single earthquake load is considered in the current seismic codes of various countries, which obviously underesti...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 翟长海包旭张茂花温卫平
Owner HARBIN INST OF TECH
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