Multi-modal performance-based aseismic design method based on condition bispectrum

A seismic design and multi-modal technology, applied in design optimization/simulation, calculation, instrumentation, etc., can solve problems such as ambiguity in correlation and inability to grasp the degree of engineering damage

Active Publication Date: 2018-08-28
QINGDAO TECHNOLOGICAL UNIVERSITY
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Problems solved by technology

The anti-seismic design is carried out by using the anti-intensity (earthquake parameters), because the correlation between the fortification intensity (earthquake parameters) and the final damage state is fuzzy. grasp

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  • Multi-modal performance-based aseismic design method based on condition bispectrum
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  • Multi-modal performance-based aseismic design method based on condition bispectrum

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[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] The multi-mode performance-based seismic design method based on behavioral bispectrum of the present invention comprises the following steps,

[0032] S1. Set a set of different performance bispectrum assuming the performance displacement angle ρ of the top layer of the structure obj-m (d) Establish a single-degree-of-freedom elastoplastic structural system with bispectral behavior and the displacement performance level of the single-degree-of-freedom system with bispectral behavior;

[0033] The single-degree-of-freedom elastoplastic dynamic differential equation of the behavior bispectrum...

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Abstract

The invention relates to the field of aseismic design technology, in particular to a multi-modal performance-based aseismic design method based on a condition bispectrum. According to the method, aseismic design is performed directly based on quantitative performance levels, wherein first, a single-freedom-degree elastic-plastic structural system of the condition bispectrum is artificially assumed, by adjusting performance displacement angles rho<obj-m>(d) of structural top layers and second stiffness of a double-broken-line elastic-plastic model, the single-freedom-degree elastic-plastic structural system is identical to a standard single-freedom-degree elastic-plastic structural system, and then structural aseismic response effects under the aseismic performance levels are solved. According to the aseismic design method based on the performance levels, a final destruction state serves as the basis of aseismic design, and therefore the aseismic performance of a structure can be controlled no matter whether an earthquake with super fortification intensity (ground motion parameters) occurs. Obviously, the aseismic design is more scientific compared with traditional performance-basedaseismic design based on fortification intensity (ground motion parameters), and the aseismic behavior of the structure can be controlled.

Description

technical field [0001] The invention relates to the technical field of anti-seismic design, in particular to a multi-mode performance-based anti-seismic design method based on behavioral bispectrum. Background technique [0002] China's seismic code (GB 50011-2016) conducts seismic design based on seismic intensity (earthquake motion parameters). The earthquake intensities with 50-year exceeding probability of 10%, 63% and 2% are respectively small earthquake, moderate earthquake and large earthquake intensity, and fortification according to three levels: that is, small earthquake is not damaged, moderate earthquake can be repaired, and large earthquake can not collapse. A two-stage method is adopted, the first stage is elastic design, and the second stage is elastic-plastic design: the first stage is elastic design under the action of small earthquakes, based on the two-dimensional elastic seismic response spectrum, using mode decomposition method or bottom shear force Cal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘文锋
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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