某预应力混凝土连续刚构桥荷载试验研究

发布时间：2018-12-19 07:00

【摘要】：自改革开放以来,我国桥梁工程建设硕果累累,取得了前所未有的瞩目成就。公路、铁路交通作为国家经济建设的重点行业,正朝着史无前例的规模和速度不断发展。大跨径桥梁如雨后春笋般跨越了中华大地,技术趋于复杂,科技含量不断增高,施工难度越来越大,标志着我国已经迈入了世界桥梁强国的行列。桥梁工程的发展离不开材料科学、施工技术的进步和发展,当然也离不开试验的进步和发展,因为试验是人们获取经验的一种必要手段。本文首先介绍了国内外预应力混凝土刚构桥的发展情况和桥梁荷载试验的发展状况。利用Midas civil软件模拟,获得荷载试验不利工况,不利截面信息,并计算得到桥梁的自振特性等信息,为现场原型试验提供了技术指导。随后,本文对荷载试验理论与方法做了简要的阐述,并制定荷载试验方案包括静力荷载试验和动力荷载试验,进行荷载试验研究,对连续刚构桥和连续梁桥原型试验结果进行分析,得出有意义的结论。最终,本文介绍了结构状态反演理论,根据现场试验响应结果,确定理论模型与原型的相似度。选取了敏感度高的参数,进行结构状态反演,对理论模型修正,并对修正后的模型进行分析。获得了有价值的结论,为后期健康监测提供支持,也为类似桥梁的荷载试验以及健康监测积累了宝贵经验。
[Abstract]:Since the reform and opening up, the construction of bridges in China has been fruitful and has made unprecedented achievements. As the key industry of national economic construction, highway and railway traffic are developing at unprecedented scale and speed. Long span bridges have sprung up across the land of China, the technology tends to be complex, the science and technology content is increasing, and the construction is becoming more and more difficult, indicating that our country has entered the ranks of the world bridge power. The development of bridge engineering can not be separated from the material science, the progress and development of construction technology, and of course, the progress and development of test, because testing is a necessary means for people to gain experience. This paper first introduces the development of prestressed concrete rigid frame bridge and the development of bridge load test. By using Midas civil software, the information of unfavorable working condition and unfavorable section of load test is obtained, and the natural vibration characteristics of the bridge are calculated, which provides technical guidance for the field prototype test. Then, the theory and method of load test are briefly described, and the load test scheme including static load test and dynamic load test is established, and the load test research is carried out. The prototype test results of continuous rigid frame bridge and continuous beam bridge are analyzed and a meaningful conclusion is drawn. Finally, the structure state inversion theory is introduced, and the similarity between the theoretical model and the prototype is determined according to the field test results. The parameters with high sensitivity are selected for structural state inversion, and the theoretical model is modified and the modified model is analyzed. The valuable conclusions are obtained to provide support for later health monitoring and to accumulate valuable experience for similar bridge load tests and health monitoring.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U448.23;U446.1

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