复杂预应力结构施工过程监测与仿真分析

发布时间：2018-01-10 14:00

本文关键词：复杂预应力结构施工过程监测与仿真分析　出处：《辽宁工程技术大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着社会的进步、科技的发展、国民经济的不断提高,大型复杂结构建筑的出现已成为必然的趋势,但因为施工过程中、运营期间的种种因素的影响,这些大型复杂结构在施工、运营中发生安全事故的机率相对较高。如何减少这类事故的发生,提前发出警报信息,做到提前准备,确保施工顺利进行,确保结构安全使用,结构健康监测显得尤为重要。本文首先介绍了结构健康监测和施工过程仿真分析常用的一些方法,为后面的研究提供了依据。紧接着以阜新市规划展示馆、博物展示馆这样一个大型复杂结构为具体研究对象进行了研究,主要内容如下：(1)根据结构基础形式复杂、空间跨度大、平面布置不规则、预应力混合结构的特点,及实际施工情况与控制目标,建立结构健康监测系统,包括后张有粘结预应力监测、预应力梁的挠度监测、竖向支撑体系的水平位移监测和整体结构沉降监测。根据各项监测的技术要求,确定监测方案、测点布置方案及相应的监测设备的选用。(2)利用可视化的测量设备对整个结构的几何变形和预应力进行了一年多的结构施工监测,监测过程中做好几何监测网的布置和复查,沉降和变形监测保证精度,预应力监测数据实时更新分析,准确的反馈结构健康状况。并对监测结果进行整理分析。(3)利用有限元软件MIDAS/GEN模拟出预应力张拉过程中梁柱变形的参考值,将数值模拟结果与实测数据进行了对比,分析预应力张拉施工过程中的各项指标是否满足设计要求。对整体结构进行了动力特性研究,提取了结构前10阶频率和振型进行分析。最后,对本文所做的研究工作进行了总结,得出了一些有参考价值的结论,并指出了有待进一步探讨解决的问题。为今后类似的结构施工提供了相关经验。
[Abstract]:With the progress of society, the development of science and technology, the continuous improvement of national economy, the emergence of large-scale complex structure building has become an inevitable trend, but because of the construction process, the operation period of various factors. These large and complex structures are relatively high probability of safety accidents in operation. How to reduce the occurrence of such accidents, send out alarm information in advance, so as to ensure the smooth construction. In order to ensure the safe use of structures, structural health monitoring is particularly important. Firstly, this paper introduces some common methods of structural health monitoring and construction process simulation analysis. Then Fuxin planning exhibition hall, museum, such as a large complex structure for the specific research object. The main contents are as follows: (1) the structure health monitoring system is established according to the characteristics of complex structure foundation form, large space span, irregular plane arrangement, prestressing mixed structure, actual construction situation and control target. It includes post-tensioned bonded prestress monitoring, deflection monitoring of prestressed beam, horizontal displacement monitoring of vertical bracing system and settlement monitoring of the whole structure. According to the technical requirements of each monitoring, the monitoring scheme is determined. The layout of measuring points and the selection of corresponding monitoring equipment. 2) the geometric deformation and prestress of the whole structure are monitored by visual measuring equipment for more than one year. In the process of monitoring, the layout and recheck of geometric monitoring network, the accuracy of settlement and deformation monitoring, and the real-time updating and analysis of pre-stress monitoring data are done. Accurate feedback structure health. And the monitoring results are analyzed. The finite element software MIDAS/GEN is used to simulate the reference value of Liang Zhu deformation in the process of prestress tensioning. The numerical simulation results are compared with the measured data, and the dynamic characteristics of the whole structure are studied by analyzing whether the indexes in the process of prestressed tensioning construction meet the design requirements. The first 10 frequencies and modes of the structure are extracted for analysis. Finally, the research work done in this paper is summarized and some valuable conclusions are obtained. It also points out the problems to be solved further and provides relevant experience for similar structure construction in the future.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU757;TU317

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