气膜钢筋混凝土穹顶结构静力与动力性能分析

发布时间：2018-03-29 08:28

本文选题：气膜钢筋混凝土　切入点：穹顶结构　出处：《河北工程大学》2017年硕士论文

【摘要】：随着国民经济的发展,在现代城市建筑结构发展过程中,混凝土薄壳结构发挥着相当重要的作用,其中包括相当多的体育场馆、教堂、货物仓库等的建设中,它们都会选择此种结构形式。但是传统的混凝土薄壳结构也存在着一些不足,比如施工过程中模板工程量大,支模拆模较困难等。近年来,我国引进了气膜钢筋混凝土穹顶薄壳结构,该类结构成功克服了以上不足,具有许多传统结构无法比拟的技术优点。目前,国内对气膜钢筋混凝土穹顶结构的研究尚处在起步阶段,对其静力性能和动力性能的全面分析较少,因此对此类结构的静力性能与动力性能研究是很有必要的。本文研究的主要内容如下:以某直径21m的气膜钢筋混凝土穹顶薄壳结构设计成型状态为研究背景,由于施工成型状态结构几何形状及仓壁壁厚均与设计状态存在差异,分别以几何形状及仓壁壁厚为参数,考察几何形状及仓壁壁厚变化对该类结构静力性能的影响。对气膜钢筋混凝土穹顶薄壳结构进行了动力性能分析,首先对结构进行模态分析,得到结构的振型形状及周期。其次,对结构进行了多遇地震下的反应谱分析,得到地震作用下,结构的内力及位移的分布规律。最后,分别分析了仓壁厚度及几何形状对结构动力特性、地震作用反应的影响。对比某直径21m的气膜钢筋混凝土穹顶薄壳结构静力试验结果、动力特性试验结果与该结构实际几何尺寸有限元模拟结果。首先分析比较该结构静力加载过程中的内力、位移变化,分析数据差别存在的原因;其次分析比较动力试验结果与有限元模拟结果的差别。从目前已有的文献来看,国内外对气膜钢筋混凝土穹顶结构的研究较少,而对其动力性能的分析更少。本文综合研究了气膜钢筋混凝土穹顶结构的静力及动力性能,以期为该类结构的设计与施工提供指导和借鉴。
[Abstract]:With the development of national economy, the thin concrete shell structure plays a very important role in the development of modern urban building structure, including a lot of stadiums, churches, goods warehouses, etc. They all choose this kind of structure form. But the traditional thin concrete shell structure also has some shortcomings, such as the large amount of formwork in the construction process, the difficulty of supporting the formwork to remove the formwork, etc. In recent years, The thin shell structure of air-film reinforced concrete dome has been introduced into China, which has successfully overcome the above shortcomings and has many technical advantages that cannot be compared with the traditional structure. In China, the research on the air-film reinforced concrete dome structure is still in its infancy, and the static and dynamic properties of the dome structure are seldom analyzed. Therefore, it is necessary to study the static and dynamic performance of this kind of structure. The main contents of this paper are as follows: the design and molding state of a thin dome structure with a diameter of 21 m is taken as the research background. Due to the difference between the geometric shape and the wall thickness of the structure and the design state, the geometric shape and the wall thickness of the silo wall are taken as the parameters respectively. The influence of geometric shape and wall thickness on the static behavior of this kind of structure is investigated. The dynamic behavior of thin shell structure with air-film reinforced concrete dome is analyzed. First, the modal analysis of the structure is carried out. The vibration shape and period of the structure are obtained. Secondly, the response spectrum of the structure under frequent earthquakes is analyzed, and the distribution law of internal force and displacement of the structure under earthquake action is obtained. The effects of the thickness and geometry of the silo wall on the dynamic characteristics of the structure and the seismic response are analyzed, and the static test results of a 21m diameter reinforced concrete dome structure with thin shell are compared. The dynamic characteristic test results are compared with the finite element simulation results of the actual geometric size of the structure. Firstly, the variation of internal force and displacement in the static loading process of the structure is analyzed and the reasons for the difference between the data are analyzed. Secondly, the difference between the dynamic test results and the finite element simulation results is analyzed. According to the existing literatures, there are few researches on the air-film reinforced concrete dome structure at home and abroad. In this paper, the static and dynamic performance of the air-film reinforced concrete dome structure is studied comprehensively, in order to provide guidance and reference for the design and construction of this kind of structure.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.9

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