本文選題：中小型橋梁 + 結(jié)構(gòu)損傷快速診斷　； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：橋梁荷載試驗是現(xiàn)役橋梁結(jié)構(gòu)進(jìn)行損傷狀態(tài)診斷的最有效的方法,然而,傳統(tǒng)的橋梁荷載試驗方法存在需要長時間中斷交通、現(xiàn)場檢測工序復(fù)雜、經(jīng)濟(jì)成本高等問題,因此,在不中斷交通或短暫中斷交通情況下,實現(xiàn)對中小型橋梁結(jié)構(gòu)損傷的快速診斷具有重要的理論意義與實用價值。系統(tǒng)總結(jié)了國內(nèi)外橋梁結(jié)構(gòu)損傷診斷的研究成果與發(fā)展趨勢,并著重分析了現(xiàn)有橋梁結(jié)構(gòu)損傷快速診斷的關(guān)鍵問題。在此基礎(chǔ)上,提出了基于準(zhǔn)靜載試驗的橋梁結(jié)構(gòu)損傷快速診斷方法的整體框架,力爭實現(xiàn)在不中斷或短暫中斷交通下的中小型橋梁結(jié)構(gòu)損傷快速診斷。重點研究了短暫中斷交通條件下橋梁結(jié)構(gòu)損傷快速診斷問題,提出了基于準(zhǔn)靜力影響面的橋梁結(jié)構(gòu)損傷快速診斷方法。該算法以基于異常診斷的結(jié)構(gòu)損傷識別算法為整體框架,以橋梁關(guān)鍵截面測試準(zhǔn)靜力影響線(面)為數(shù)據(jù)基礎(chǔ),利用健康狀態(tài)下橋梁主梁關(guān)鍵截面準(zhǔn)靜力影響線(面)近似線性相關(guān)的特點,實現(xiàn)橋梁結(jié)構(gòu)損傷診斷的目的。以數(shù)值模擬為手段,分別模擬簡支梁橋及連續(xù)梁橋梁準(zhǔn)靜力影響線及影響面,對所提算法在不同結(jié)構(gòu)損傷程度及測試噪聲水平下的有效性進(jìn)行了驗證。在上述研究結(jié)果基礎(chǔ)上,基于MATLAB軟件平臺,搭建了基于準(zhǔn)靜載試驗的橋梁結(jié)構(gòu)損傷快速診斷軟件系統(tǒng)的整體框架,并重點研發(fā)了短暫中斷交通下橋梁結(jié)構(gòu)損傷快速診斷軟件模塊。
[Abstract]:Bridge load test is the most effective method to diagnose the damage state of existing bridge structures. However, the traditional bridge load test methods need to interrupt traffic for a long time, the field detection process is complicated, and the cost is high. Under the condition of no or short interruption of traffic, it is of great theoretical significance and practical value to quickly diagnose the damage of small and medium-sized bridges. The research results and development trend of damage diagnosis of bridge structures at home and abroad are systematically summarized, and the key problems of rapid damage diagnosis of existing bridges are emphatically analyzed. On the basis of this, the whole frame of the fast diagnosis method of bridge structure damage based on quasi static load test is put forward, which can realize the fast diagnosis of bridge structure damage under the condition of no interruption or short interruption of traffic. In this paper, the problem of rapid damage diagnosis of bridge structure under the condition of short interruption traffic is studied, and the fast diagnosis method of bridge structure damage based on quasi-static influence surface is put forward. The algorithm takes the structural damage identification algorithm based on anomaly diagnosis as the whole frame, and takes the quasi-static influence line (surface) of the key section of the bridge as the data base. In order to realize the damage diagnosis of the bridge structure, the quasi-static influence line (plane) of the key section of the bridge is approximately linearly correlated under the condition of health. By means of numerical simulation, the quasi-static influence lines and influence surfaces of simply supported beam bridges and continuous beam bridges are simulated, respectively, and the validity of the proposed algorithm under different structural damage levels and test noise levels is verified. Based on the above research results and MATLAB software platform, the whole frame of the rapid damage diagnosis software system of bridge structure based on quasi-static load test is built. In addition, the software module of bridge structure damage fast diagnosis under temporary traffic interruption is researched and developed.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U446

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本文編號：2084565