装配式框架结构施工阶段的动态性能实验研究

发布时间：2018-01-21 07:17

本文关键词： 装配式建筑实验动态分析有限元建模分析频率和振型刚度　出处：《河北大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,由于劳动力的缺失和环境污染问题日益突出,装配式建筑结构在我国得到快速的发展。同时,在对装配式建筑结构设计分析方面,装配式结构局部节点构造、节点连接等领域,研究人员积累了丰富了文献。但是,在装配式建筑结构整体刚度分析方面,研究成果较少。研究人员主要在实验室对其进行实验研究,对其结构部件进行振动性能检测,在大型装配式建筑上缺乏有效的实验数据分析。《装配式混凝土结构技术规范》规定,结构分析方面,装配式建筑等同于现浇结构分析计算。本文着重于动力特性检测实验方面,来分析装配式混凝土框架结构在施工过程中的频率周期变化,与有限元软件建模分析对比,来反映其刚度变化。利用河北省保定市未来国际中心两栋高层写字楼项目,对两栋装配式高层建筑从底层到高层施工过程中进行跟随动态振动信号测试,在结构不同位置安放速度传感器,随着施工过程中楼层的增高,进行分步检测实验得到建筑的动态特性,进行动态分析,从而获得装配式建筑物施工过程中不同层数时的振动频率。在PKPM软件中对建筑物进行有限元建模分析,得到现浇式建筑结构的理论振动频率,对两种数据进行分析对比,并利用经验公式进行验证,得出结论:本次试验中装配式混凝土框架结构与现浇结构在频率值上较为接近,相对于数值计算理论值和经验公式法计算值,现场试验检测值略微偏小,但是偏差很小。从而证明装配式混凝土框架结构比现浇结构刚度偏弱有限,刚度基本等同。
[Abstract]:In recent years, due to the shortage of labor force and the problem of environmental pollution, the prefabricated building structure has been developing rapidly in China. At the same time, the design and analysis of the prefabricated building structure has been carried out. The researchers have enriched the literature in the field of local node construction and joint connection of fabricated structures. However, in the analysis of the overall stiffness of fabricated structures. The research results are less. The researchers mainly carry on the experimental research in the laboratory, and test the vibration performance of the structural parts. There is a lack of effective experimental data analysis in large assembled buildings. The Technical Specification for Assembly concrete structures is stipulated in the structural analysis. The prefabricated building is equivalent to the analysis and calculation of cast-in-place structure. In this paper, the frequency cycle of the prefabricated concrete frame structure in the construction process is analyzed by focusing on the test experiment of dynamic characteristics. Compared with the finite element software to reflect the stiffness change, two high-rise office buildings in the future international center of Baoding City, Hebei Province are used. The dynamic vibration signals of two prefabricated high-rise buildings are tested during the construction from the bottom to the high buildings, and the speed sensors are placed in different positions of the structure, with the increase of the floors during the construction process. The dynamic characteristics of the building are obtained by stepwise test, and the dynamic analysis is carried out. In order to obtain the vibration frequency of different storeys in the construction process of prefabricated buildings, the theoretical vibration frequency of cast-in-place building structure is obtained by the finite element modeling and analysis of the building in PKPM software. The two kinds of data are analyzed and compared, and verified by empirical formula. It is concluded that the frequency value of the prefabricated concrete frame structure and cast-in-place structure is close in this experiment. Compared with the theoretical value of numerical calculation and the calculated value of empirical formula method, the measured value of field test is slightly smaller, but the deviation is very small, which proves that the stiffness of prefabricated concrete frame structure is weaker than that of cast-in-place structure. Stiffness is basically the same.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU758.12

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