Seismic damage assessment method of reinforced concrete continuous beam bridges based on energy transfer rate

Abstract

The invention provides a seismic damage assessment method of reinforced concrete continuous beam bridges based on an energy transfer rate, comprising the following steps of S1 acquiring vulnerable components in a reinforced concrete continuous beam bridge structure, and screening out key components related to structural safety; S2 according to the failure mechanism of each key component, establishing corresponding failure criterion, obtaining n component parameters related to component damage and the maximum allowable value of each component parameter; 3 carrying out energy analysis of each key component of the continuous beam bridge under different ground motion input condition, obtaining the energy representative value of each key component and the response peak delta i of each componentparameter, and calculating the energy transfer rate of each key component; S4 based on the energy transfer rate, establishing the seismic damage evaluation index D of the reinforced concrete continuous beam bridge. The method of the invention can evaluate various seismic damages of the continuous beam bridge structure-different degrees of damages or even structural collapse based on damage evaluation indexes of the structural hierarchy.

Description

technical field [0001] The invention relates to the field of seismic evaluation of bridges in the field of civil engineering, in particular to an evaluation method for earthquake damage of reinforced concrete continuous girder bridges based on energy transfer rate. Background technique [0002] Reinforced concrete continuous girder bridges are the main type of small and medium-sized bridges in my country. This type of bridge has experienced earthquake damage in many earthquakes. Structural reinforcement or demolition and reconstruction. [0003] To determine the damage degree of the bridge caused by the earthquake is to carry out the seismic assessment of the bridge, and any assessment needs to put forward the assessment index first. In terms of seismic assessment of bridge structures, the structural assessment problem is usually decomposed into component assessment issues. For example, the damage assessment problem of a continuous girder bridge is decomposed into damage ass...

AI Technical Summary

Problems solved by technology

However, the relationship between the damage results of different degrees of components and the overall damage degree of the bridge structure has not been clear. For example, if the evaluation result at the component level is that the support is seriously damaged and the pier is slightly damaged, what is the damage degree of the bridge structure? Therefore, it is necessary to study the method of evaluating the earthquake damage degree of bridges from the perspective of the structure as a whole.

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