本文選題：橋梁檢測 + 應變測試　； 參考：《長安大學》2015年碩士論文

【摘要】：橋梁作為交通運輸?shù)难屎?時刻左右著公路的生命。盡管隨著技術的發(fā)展和進步,橋梁的設計理論以及計算方法都發(fā)生了重大的改變,但對于工程質(zhì)量而言,仍然有許多不確定性因素存在,對于新建的橋梁可以通過橋梁試驗檢測了解其施工質(zhì)量和結構的受力性能,為橋梁的竣工驗收提供有效的技術資料;而對于既有的舊橋也可以通過試驗檢測掌握其使用性能和承載能力,為橋梁的養(yǎng)護與加固提供可靠的資料。應變作為橋梁測試中最主要的測試量之一,雖然在以往的橋梁應變測試中已有很多種應變測試方法,但是在實際應變測量過程中,還存在很多問題難以解決,HJ型應變測量傳感器就可以解決目前橋梁結構應變測試中的一系列問題。本文針對HJ型應變測量傳感器進行研究,分析其基于雙懸臂梁結構的工作原理與工作特性,從理論上驗證了這種雙懸臂梁結構用于制作應變測量傳感器的可行性及其優(yōu)點。通過混凝土標準試件對比試驗,驗證了傳感器測試結果的準確性;通過一系列特性試驗驗證了傳感器具有良好的工作性能,給出了溫度修正公式、長導線修正公式以及傳感器靈敏度的調(diào)控方法等。通過工程實例介紹了HJ型應變測量傳感器在工程中的一系列應用。該傳感器可用于實橋荷載試驗中的應變測試以及裂縫變化監(jiān)測;可用于石拱橋拱圈應變測試;可用于試驗梁的開裂荷載監(jiān)測;可用于平面應變測試;可用于鋼絞線應變測試;可用于橋梁結構動態(tài)應變的測試;可用于鋼橋塔模型屈曲荷載的監(jiān)測;可用于應力釋放法中有效預應力的測試;可用于施工中的應變監(jiān)測等。該傳感器有效地解決了結構工程應變測試技術中的許多問題。
[Abstract]:Bridge, as the throat of transportation, affects the life of highway at all times. Although the design theory and calculation methods of bridges have changed greatly with the development and progress of technology, there are still many uncertain factors for engineering quality. For the newly built bridges, the construction quality and the mechanical performance of the structures can be understood through the bridge test and inspection, and the effective technical data can be provided for the completion and acceptance of the bridges. For the existing old bridges, the performance and bearing capacity of the old bridges can also be grasped through testing and testing, which can provide reliable data for the maintenance and reinforcement of the bridges. Strain is one of the most important measurements in bridge testing. Although there have been many methods of strain measurement in the past, but in the process of actual strain measurement, There are still many problems which are difficult to solve and can solve a series of problems in the strain measurement of bridge structure. In this paper, the HJ strain measurement sensor is studied, and its working principle and characteristics based on double cantilever beam structure are analyzed. The feasibility and advantages of the double cantilever structure for making strain measurement sensor are verified theoretically. The accuracy of the sensor test results is verified by the contrast test of concrete standard specimen, the good working performance of the sensor is verified by a series of characteristic tests, and the temperature correction formula is given. Long traverse correction formula and sensor sensitivity control methods and so on. A series of applications of HJ strain sensor in engineering are introduced through engineering examples. The sensor can be used for strain test and crack change monitoring in real bridge load test, strain test for arch ring of stone arch bridge, crack load monitoring for test beam, plane strain test, strain test for steel strand; It can be used to test dynamic strain of bridge structure, to monitor buckling load of steel bridge tower model, to test effective prestress in stress release method, to monitor strain in construction, etc. The sensor has effectively solved many problems in structural engineering strain measurement technology.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U446

【引證文獻】

相關會議論文 前1條

1 諶潤水;;公路橋梁狀態(tài)評定與橋梁建設可持續(xù)發(fā)展[A];第二屆全國公路科技創(chuàng)新高層論壇論文集（上卷）[C];2004年

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本文編號：1948960