【摘要】：截止2013年底,我國(guó)已投入運(yùn)營(yíng)的公路橋梁中,技術(shù)狀況評(píng)定等級(jí)為四、五類(lèi)橋梁數(shù)量達(dá)97698座,占橋梁總數(shù)的16.43%。我國(guó)公路交通運(yùn)輸中大量危橋的存在嚴(yán)重威脅著道路的安全暢通,對(duì)人們的生命、財(cái)產(chǎn)產(chǎn)生巨大的安全隱患。在交通量日趨增大,車(chē)輛荷載日益增加的今天,開(kāi)展簡(jiǎn)支梁橋安全評(píng)價(jià)的研究,提出一種有效、快捷的簡(jiǎn)支梁橋安全評(píng)價(jià)方法具有重要的現(xiàn)實(shí)意思。本文通過(guò)對(duì)我國(guó)2001至2013年發(fā)生的41起簡(jiǎn)支梁橋事故統(tǒng)計(jì),對(duì)事故發(fā)生的原因及造成的直接和間接損失進(jìn)行了統(tǒng)計(jì)分析。通過(guò)計(jì)算簡(jiǎn)支梁橋事故的魯棒性指數(shù),提出了提升簡(jiǎn)支梁橋梁魯棒性的改善措施。通過(guò)從人員、車(chē)輛、橋梁屬性以及環(huán)境因素這四方面展開(kāi),對(duì)影響簡(jiǎn)支梁橋的安全性能的因素進(jìn)行了詳細(xì)分析,并歸納出28項(xiàng)簡(jiǎn)支梁橋安全影響因素。通過(guò)對(duì)山西省太原市、忻州市、大同市、呂梁市這四個(gè)地區(qū)的簡(jiǎn)支梁橋基礎(chǔ)數(shù)據(jù)的處理分析,運(yùn)用主成分分析對(duì)簡(jiǎn)支梁橋安全評(píng)價(jià)指標(biāo)進(jìn)行了指標(biāo)篩選,并運(yùn)用粗糙集理論確定了指標(biāo)權(quán)重。根據(jù)可拓物元理論,確定了簡(jiǎn)支梁橋安全評(píng)價(jià)指標(biāo)的經(jīng)典域和節(jié)域,并最終建立了基于可拓學(xué)理論的簡(jiǎn)支梁橋安全評(píng)價(jià)體系,提出了一種實(shí)用、有效評(píng)定簡(jiǎn)支梁橋安全狀況的方法。基于Visual Basic程序開(kāi)發(fā)平臺(tái),開(kāi)發(fā)了具有良好可視化界面、實(shí)用、方便快捷的簡(jiǎn)支梁橋安全評(píng)價(jià)系統(tǒng)。運(yùn)用該程序?qū)ι轿魇⊙視?huì)大橋進(jìn)行了安全評(píng)價(jià),并與該橋?qū)嶋H橋梁檢測(cè)結(jié)果進(jìn)行了對(duì)比分析,結(jié)果表明本系統(tǒng)的安全評(píng)價(jià)結(jié)果與實(shí)際檢測(cè)結(jié)果有較好的吻合性,證明了系統(tǒng)的準(zhǔn)確性和可行性。本文的研究提出了一種基于可拓物元理論的簡(jiǎn)支梁橋安全評(píng)價(jià)方法,并開(kāi)發(fā)了簡(jiǎn)支梁橋安全評(píng)價(jià)系統(tǒng),可大大提升簡(jiǎn)支梁橋安全評(píng)定結(jié)果精度和評(píng)價(jià)效率,對(duì)促進(jìn)我國(guó)簡(jiǎn)支梁橋安全評(píng)價(jià)事業(yè)的發(fā)展具有重要的社會(huì)意義和現(xiàn)實(shí)意義。
[Abstract]:By the end of 2013, among the highway bridges that have been put into operation in China, the number of the five types of bridges is 97698, accounting for 16.43% of the total number of bridges. The existence of a large number of dangerous bridges in our country's highway transportation seriously threatens the safety and unimpeded of the road, and has a huge hidden danger to people's lives and property. With the increasing traffic volume and increasing vehicle load, it is of great practical significance to carry out the research on the safety evaluation of simply supported beam bridges and put forward an effective and fast method for safety evaluation of simply supported beam bridges. Based on the statistics of 41 simple supported bridge accidents in China from 2001 to 2013, the causes of the accidents and the direct and indirect losses caused by the accidents are statistically analyzed in this paper. By calculating the robustness index of simply supported beam bridge accident, the improvement measures for improving the robustness of simply supported bridge are put forward. The factors affecting the safety performance of simply supported beam bridges are analyzed in detail from the aspects of personnel, vehicles, bridge attributes and environmental factors, and 28 factors affecting the safety of simply supported bridges are summarized. Through processing and analyzing the basic data of simply supported bridge in Taiyuan, Xinzhou, Datong and Luliang in Shanxi Province, and using principal component analysis, the index of safety evaluation of simply supported beam bridge is screened. The index weight is determined by rough set theory. According to extension matter-element theory, the classical domain and segment domain of safety evaluation index of simply supported beam bridge are determined. Finally, the safety evaluation system of simply supported beam bridge based on extension theory is established, and a practical application is put forward. An effective method for evaluating the safety condition of simply supported beam bridges. Based on Visual Basic program development platform, a simple beam bridge safety evaluation system with good visual interface, practicality and convenience is developed. The safety evaluation of Xue Jiahui Bridge in Shanxi Province is carried out by using this program, and compared with the actual bridge test results of the bridge. The results show that the safety evaluation results of this system are in good agreement with the actual test results. The accuracy and feasibility of the system are proved. In this paper, a simple supported beam bridge safety evaluation method based on extension matter-element theory is proposed, and a simple supported beam bridge safety evaluation system is developed, which can greatly improve the accuracy and efficiency of the safety evaluation results of the simply supported beam bridge. It is of great social and practical significance to promote the development of safety evaluation of simply supported bridges in China.
【學(xué)位授予單位】：河北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U447;U448.217

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本文編號(hào)：2176951