Anti-seismic property probability assessment method based on behavior bispectrum

Abstract

The invention relates to an anti-seismic property probability assessment method based on behavior bispectrum. The anti-seismic property probability assessment method comprises the following steps that1, the anti-seismic property level of an engineering structure is determined; 2, property level displacements for setting a single-freedom-degree system under different property levels are confirmed;3, a simulation test is performed through a single-freedom-degree elastic-plastic differential equation; 4, a behavior earthquake dynamic-inputting spectrum and a behavior response spectrum are respectively obtained; 5, seismic oscillation probability distribution models of each period point and seismic response probability distribution models under different property levels are determined through K-S inspection; 6, probability assessment is conducted on input seismic oscillations under the different property levels; 7, probability assessment is conducted on seismic response accelerations reaching the different property levels; 8, probability assessment is conducted on structural base shear parameters; 9, probability assessment is conducted on a structural seismic action effect. By adopting the anti-seismic property probability assessment method, more scientific and accurate assessment results are provided for the safety of anti-seismic structures at the probability level based on theanti-seismic property level.

Description

technical field [0001] The invention relates to an engineering structure anti-seismic evaluation method in the field of civil engineering, in particular to an anti-seismic performance probability evaluation method based on behavioral bispectrum. Background technique [0002] Performance-based seismic design is a frontier topic in international seismic research, and it is also the development direction of seismic design codes around the world. The performance code of buildings and facilities in the United States (2009), the seismic code of China (2010) and other national seismic codes have begun to adopt performance-based seismic design. The main analysis methods of energy-dissipating and shock-absorbing structures include: Capacity Spectrum Method (CSM), Target Displacement Method (Target Displacement), Factored-Demand-to-Capacity Ratio (FDCR), Seismic Performance Coefficient Method (Seismic Performance Factors, SPF) and so on. In the spectral acceleration and spectral dis...

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Problems solved by technology

However, the above methods are all based on the seismic performance of a certain level of seismic intensity to complete the performance seismic design, and did not carry out seismic performance evaluation based on the seismic performance level

[0003] China's seismic design evaluation technology, such as the Chinese patent disclosed on May 20, 2011, the publication number is CN102787676 B, discloses a multi-objective performance-based seismic design method for engineering structures, and the Chinese patent disclosed on December 15, 2011, The publication number is CN103161348 B, which discloses a multi-objective performance-based seismic evaluation method for engineering structures. Carry out probability level assessment, the depth of the method needs to be improved

Published papers "Deterministic method of seismic performance spectrum of structures" ("Engineering Mechanics". 2008, Vol. Volume 29 (No. 10) mentions behavioral response spectrum, but none of them proposed behavioral ground motion input spectrum, did not form a method with industrial intellectual property rights, and did not carry out evaluation at the probability level

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