本文選題：健康監(jiān)測(cè) + 損傷識(shí)別　； 參考：《廣州大學(xué)》2014年碩士論文

【摘要】：近年來(lái)，對(duì)橋梁結(jié)構(gòu)健康監(jiān)測(cè)的研究越來(lái)越受到人們的關(guān)注，這不僅因?yàn)闃蛄簲?shù)量的增加，更因?yàn)楦鱾�(gè)國(guó)家都面臨著橋梁養(yǎng)護(hù)維修的高峰期。而損傷識(shí)別是健康監(jiān)測(cè)的核心，它可以用來(lái)評(píng)估橋梁的健康狀況并給出合理的維修養(yǎng)護(hù)意見。因此，進(jìn)行損傷識(shí)別的研究具有重要的現(xiàn)實(shí)意義和社會(huì)價(jià)值。 本文基于目前的工程結(jié)構(gòu)損傷識(shí)別的研究現(xiàn)狀，特別是基于影響線的損傷識(shí)別現(xiàn)狀，分析了目前的損傷識(shí)別存在的問(wèn)題，，針對(duì)連續(xù)梁橋，進(jìn)行了基于撓度影響線的相關(guān)損傷識(shí)別研究。主要內(nèi)容如下： ①介紹了論文的選題背景及研究意義，綜述了工程結(jié)構(gòu)損傷識(shí)別的研究現(xiàn)狀及基于撓度影響線進(jìn)行損傷識(shí)別的已有研究，闡明了本文的研究目的及主要工作。 ②推導(dǎo)了損傷前后一典型連續(xù)梁的撓度影響線的解析表達(dá)式，在理論上證明了這種識(shí)別方法的可行性。并由此建立了基于撓度影響線進(jìn)行損傷識(shí)別的損傷指標(biāo)。 ③基于撓度影響線，對(duì)連續(xù)梁橋進(jìn)行損傷識(shí)別的數(shù)值模擬。通過(guò)單個(gè)損傷、多個(gè)損傷、不同損傷位置、不同損傷程度等工況下的識(shí)別效果，對(duì)比了各個(gè)損傷識(shí)別指標(biāo)的優(yōu)劣。 ④建立了基于撓度影響線的損傷識(shí)別方法的驗(yàn)證性實(shí)驗(yàn)。設(shè)計(jì)了具有不同損傷程度和不同損傷位置的連續(xù)梁模型，采用了一種新的測(cè)量?jī)x器，并設(shè)計(jì)了相應(yīng)的測(cè)試方法。測(cè)得了連續(xù)梁模型在不同工況下的撓度影響線，在實(shí)驗(yàn)室條件下證實(shí)了本文提出的識(shí)別方法的有效性。
[Abstract]:In recent years, more and more attention has been paid to the study of bridge structure health monitoring, not only because of the increase in the number of bridges, but also because every country is facing the peak period of bridge maintenance and repair. Damage identification is the core of health monitoring, it can be used to evaluate the health status of bridges and give reasonable maintenance advice. Therefore, the study of damage identification has important practical significance and social value. Based on the current research status of damage identification of engineering structures, especially the damage identification based on influence lines, this paper analyzes the existing problems of damage identification, aiming at continuous beam bridges. The related damage identification based on deflection influence line is studied. The main contents are as follows: 1. The background and significance of the thesis are introduced. The present research situation of engineering structure damage identification and the existing research on damage identification based on deflection influence line are summarized. The purpose and main work of this paper are expounded. 2 the analytical expression of deflection influence line of a typical continuous beam before and after damage is derived, and the feasibility of this method is proved theoretically. The damage index based on deflection influence line is established. 3 based on deflection influence line, the damage identification of continuous beam bridge is simulated. By single injury, multiple damage, different damage location, different damage degree and other working conditions, The advantages and disadvantages of each damage identification index are compared. 4 the verification experiment of damage identification method based on deflection influence line is established. The continuous beam model with different damage degree and different damage position is designed. A new measuring instrument is adopted and the corresponding testing method is designed. The deflection influence lines of the continuous beam model under different working conditions were measured. The validity of the proposed identification method was verified in the laboratory.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U446;U448.215

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