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Three-level engineering seismic ground motion selection method based on physical mechanism

A ground motion and layered technology, applied in infrastructure engineering, electrical digital data processing, special data processing applications, etc., can solve problems such as strength degradation, structural component damage, etc.

Active Publication Date: 2022-04-19
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Description
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  • Application Information

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Problems solved by technology

During a strong earthquake, the engineering structure enters a plastic state, the structural components are seriously damaged, and the strength is obviously degraded. Compared with the elastic stage, the mode shape period of each order changes. However, the existing ground motion selection methods do not consider this problem.

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  • Three-level engineering seismic ground motion selection method based on physical mechanism
  • Three-level engineering seismic ground motion selection method based on physical mechanism
  • Three-level engineering seismic ground motion selection method based on physical mechanism

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Embodiment Construction

[0023] The present invention is further illustrated below in conjunction with embodiments and accompanying drawings:

[0024]Taking a 5-layer frame structure as an example, the seismic ground motion selection method of the frame structure is described as follows: The three-dimensional diagram of the frame structure can be found Figure 1 , see floor plan Figure 2 。 The frame has a fortification intensity of 6 degrees, a site category of Class II sites, a design seismic grouping of the second group, and a site characteristic period of T g Is 0.40s.

[0025] (1) Comprehensively consider the seismic environmental factors such as site effect, epicenter distance, magnitude size, etc., and complete the selection of ground movement at the first level in accordance with the principle of being consistent with the building site as much as possible.

[0026] (2) Calculate the period and mode of each step of the engineering structure, and calculate the participation mass coefficient of each ...

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Abstract

The invention belongs to the field of engineering anti-seismic technology. The three-level engineering anti-seismic ground motion selection method based on the physical mechanism of the present invention includes the following steps: comprehensively considering the seismic environmental factors of site effect, epicentral distance, and magnitude, the selection of the first level of ground motion is completed ;Calculate the period and mode shape of each order of the engineering structure, and calculate the participation mass coefficient of each mode shape; determine the number of effective mode shapes and the effective period as; Matching, the preliminary ground motion selection of the second level is completed; calculate the relative difference between the acceleration of the ground motion time history spectrum and the standard spectrum on the effective period; calculate the average value of the relative difference between the ground motion time history spectrum acceleration and the standard spectrum at the section period point. The application solves the problem of selection of high-vibration mode ground motions of long-period engineering structures, and improves the application of ground motion selection technologies of different engineering structures under the conditions of large earthquakes and extremely large earthquakes.

Description

Technical field [0001] The present invention belongs to the field of engineering seismic technology, specifically relates to a ground motion selection method in the field of engineering seismic resistance. Background [0002] Consistent selection of ground motion in accordance with target spectrum matching is the main method of ground motion selection in the world's engineering earthquake resistance. The target spectrum includes the canonical spectrum, the consistent probability spectrum, the conditional mean spectrum, and so on. The US ASCE / SEI7-10 specification is required at [0.2T]. 1 ，1.5T 1 ] on the period segment to match the specification design spectrum; European anti-regulation EC-8 takes [0.2T]. 1 ，2.0T 1 ], requiring the selected seismic record response spectrum in the range of the mean value is not less than 90% of the normative spectrum; China's "Anti-regulation" and "High Gauge" do not specifically mention the selection method of ground movement, but put forward th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13E02D31/08E04H9/02G06F119/14
CPCG06F30/13E02D31/08E04H9/02G06F2119/14
Inventor 刘文锋张嘉琦
Owner QINGDAO TECHNOLOGICAL UNIVERSITY