本文選題：工具式應變傳感器 + 應變測量�。� 參考：《重慶交通大學》2015年碩士論文

【摘要】：針對WDAS-YB100型工具式應變傳感器,采用有限元計算、室內試驗、實橋試驗等方法,并通過與常規(guī)的粘貼電阻應變片方法進行比對,開展工具式應變傳感器在橋梁應變測試中的應用技術研究,得到了以下主要結果:①通過ANSYS有限元數值模擬分析和標定實驗可知,WDAS-YB100型工具式應變傳感器通過挖孔應變值放大了1.5倍,其靈敏度系數為1.685。②針對WDAS-YB100工具式應變傳感器室內鋼梁實驗,通過ANSYS有限元分析和實驗結果分析可知,應變片和工具式應變傳感器的應變值與理論應變值相比,其最大相對誤差分別為2.5%和3.4%,測量結果均具有較高的準確性、重復性和穩(wěn)定性,且與數據采集儀等設備能較好的匹配;同時室內鋼梁實驗為小構件實驗,由于弓形應變傳感器距離被測結構表面存在一定的距離的影響工具式應變傳感器應變值是應變片應變值的2.18倍,與理論計算值相對誤差為1.38%,實驗結果與理論計算值具有較好的重復性。③通過對工具式應變傳感器的室內鋼梁粘貼強度實驗和現場混凝土梁橋粘貼強度實驗分析,在考慮溫度和膠水用量對粘貼時間影響的情況下,在鋼結構表面粘貼7分鐘后,在混凝土結構表面粘貼25分鐘后進行試驗較理想。同時為了便于腹板應變測量宜將柱形基座改為L形基座,L形基座底面、側面作為粘貼面進行測量,增大工具式應變傳感器的標距對拱橋等結構進行應變測量。④兩座實橋試驗采用WDAS-YB100型工具式應變傳感器與應變片測量的對比試驗,并通過對實測應變值的校驗系數進行離散性分析可知,工具式應變傳感器的校驗系數方差小于應變片測量校驗系數方差,說明工具式應變傳感器校驗系數的離散程度小于應變片測量校驗系數,工具式應變傳感器的應變測量結果穩(wěn)定性更好、更準確、受人為因素影響小。同時工具式應變傳感器安裝與拆卸簡單、技術人員要求低、耗時少。
[Abstract]:For the WDAS-YB100 type tool strain sensor, finite element calculation, indoor test, real bridge test and so on are adopted, and compared with the conventional resistance strain gauge method. The research on the application technology of the tool strain sensor in the bridge strain test is carried out. The following main results are obtained: 1. Through the ANSYS finite element numerical simulation and calibration experiments, we can see that the WDAS-YB100 tool strain sensor magnifies the strain value by 1.5 times by digging hole. The sensitivity coefficient is 1.685.2 the strain value of strain gauge and tool strain sensor is compared with the theoretical strain value by ANSYS finite element analysis and experimental result analysis. The maximum relative error is 2.5% and 3.4% respectively. The measurement results have high accuracy, repeatability and stability, and can match well with the equipment such as the data acquisition device, and the indoor steel beam experiment is a small component experiment. The strain value of the tool strain sensor is 2.18 times that of the strain gauge because there is a certain distance between the bow strain sensor and the measured structure surface. The relative error between the calculated value and the theoretical value is 1.38. The experimental results have a good reproducibility with the theoretical calculation value. 3. Through the experiment of the indoor steel beam bonding strength of the tool strain sensor and the field concrete beam bridge bonding strength experiment analysis, Considering the effect of temperature and glue content on the bonding time, it is ideal to test the steel structure surface after 7 minutes, and the concrete structure surface after 25 minutes. At the same time, in order to facilitate the web strain measurement, the column base should be changed into the L-shaped base, and the side should be used as the adhesive surface. The strain measurement of arch bridge and other structures was carried out by increasing the gauge distance of the tool strain sensor. 4. Two real bridges were tested by the contrast test of WDAS-YB100 tool strain sensor and strain gauge measurement. Through the discreteness analysis of the calibration coefficient of the measured strain value, it can be seen that the variance of the calibration coefficient of the tool strain sensor is smaller than that of the check coefficient measured by the strain gauge. It shows that the dispersion of calibration coefficient of tool strain sensor is smaller than that of strain gauge measurement, and the strain measurement result of tool strain sensor is more stable, more accurate and less affected by human factors. At the same time, the tool strain sensor is easy to install and disassemble, and the technicians require less time.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U446;TP212

【參考文獻】

相關期刊論文 前3條

1 李炳生;李斌;曹文清;;電阻應變式傳感器在結構試驗中的應用新技術[J];結構工程師;2011年S1期

2 戴雨;魏莉潔;;基于ANSYS的帶孔鋼板應力分析[J];建材技術與應用;2011年06期

3 吉伯海;傅中秋;;近年國內橋梁倒塌事故原因分析[J];土木工程學報;2010年S1期

相關碩士學位論文 前1條

1 田環(huán)宇;基于振弦式傳感器的壓力檢測系統(tǒng)的研究與設計[D];西南交通大學;2011年

，

本文編號：1963911