A Spectral Model of Inelastic Displacement Based on Continuous Earthquake-Tsunami Action

Abstract

The invention discloses an inelastic displacement ratio spectrum model based on the continuous earthquake-tsunami action, which belongs to the field of earthquake engineering. The present invention selects a large number of ground motions to establish a series of inelastic single-degree-of-freedom structures with different periods; for each period of the inelastic single-degree-of-freedom structure, determine its dynamic characteristics; use the structural dynamic equation to calculate a given earthquake-tsunami The maximum elastic displacement of the structure under continuous action, and calculate the maximum elastic strength; calculate the maximum displacement of the structure under the continuous action of earthquake-tsunami; calculate the displacement ductility coefficient of the structure, and judge whether the structural displacement ductility meets the target ductility; through regression analysis , to establish an inelastic displacement ratio spectrum model based on the continuous earthquake-tsunami action. The invention solves the problem that the non-elastic displacement ratio spectrum models proposed at present are all based on the single earthquake action, and the further influence of the tsunami action after the earthquake on the structural response is ignored.

Description

technical field [0001] The invention belongs to the field of earthquake engineering, in particular to an inelastic displacement ratio spectrum model based on the continuous earthquake-tsunami action. Background technique [0002] Historical earthquake-tsunami data show that tsunamis are often triggered by submarine earthquakes, thus forming a sequence-type earthquake-tsunami effect. Although earthquake-tsunami continuous action can cause greater damage or even collapse to coastal structures than single earthquake action, however, the seismic design codes in my country and the world have not considered its adverse impact on structural response. Therefore, evaluating the behavior of existing structures under continuous earthquake-tsunami action is of great significance for improving the seismic safety of coastal structures and revising codes for seismic design of structures. [0003] Displacement-based seismic assessment is the most widely used behavior assessment theory in b...

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Problems solved by technology

[0004] The present invention aims to provide an inelastic displacement ratio spectrum model based on the earthquake-tsunami continuous action to solve the problem that the existing inelastic displacement ratio spectrum model only considers the single action of the earthquake and fails to consider the structural response to the continuous action of the tsunami after the earthquake Impact and other issues

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