远大小天城楼盖人致振动舒适度实测及研究

发布时间：2018-06-30 21:50

本文选题：预制装配式集成楼盖 + 人行荷载　；参考：《湖南大学》2015年硕士论文

【摘要】：近年来,随着轻质和高强材料的应用、结构分析和设计技术的进步、施工技术的发展,结构形式向着大跨度、柔体系、低阻尼方向发展,楼盖的竖向自振频率变得越来越低,质量和阻尼越来越小。在人的正常活动下,楼盖的振动反应增大,当楼盖振动达到一定程度时,会给使用者带来烦恼和不适,甚至造成恐慌,影响建筑的正常使用功能。社会经济的发展和人民生活水平的提高使得人们对生活品质的要求越来越高,相应的,对楼盖的振动舒适度要求也越来越高,倘若建筑建成后才发现楼盖的舒适度存在问题,事后修补技术难度大而且费用高。因此,进行楼盖设计时,不仅要满足强度和变形的要求,还应充分考虑舒适度问题。随着建筑工业化的发展,世界发达国家都将建筑部件工业化预制和装配化施工作为建筑行业发展的一个方向。装配式钢结构建筑符合国家绿色建筑、建筑工业化发展战略,近几年来得到了大力发展。预制装配式集成楼盖作为一种新型楼盖,具有模数化设计、生产标准化、功能高度集成化、施工速度快和技术经济效益好等优点,具有很好的应用前景。由于该新型楼盖采用了轻质高强材料和新的施工技术,楼盖的整体性和刚度下降,产生舒适度问题的可能性增大,因此,开展对该新型楼盖舒适度的研究工作是十分必要的。本文以远大小天城为工程背景,对预制装配式集成楼盖进行了人致振动舒适度研究,主要内容如下:(1)介绍了国内外楼盖振动舒适度研究的历史和现状,指出了目前还存在的问题;从人行激励力理论、强迫振动理论和舒适度评价标准三个方面介绍了楼板人致振动舒适度理论,为新型预制装配式集成楼盖舒适度分析奠定了理论基础。(2)对远大小天城中庭楼盖进行了现场人致振动舒适度试验,得到了楼盖的动力特性和楼盖在人行荷载作用下的竖向振动响应,分析了荷载类型、荷载频率、行进路线及人群规模对楼盖竖向振动的影响规律。(3)利用SAP 2000有限元软件,采用行走路线法和定点激励法两种不同加载方式对远大小天城中庭楼盖竖向振动进行了有限元模拟,将模拟得到的计算值对试验值进行了对比分析,进一步研究了荷载频率和主板间连接件对楼盖竖向振动动力响应的影响。(4)结合《高层建筑混凝土结构技术规程》(JGJ3-2010)和美国AISC规范,确定了本文的舒适度评价标准,并对远大小天城中庭楼盖进行了楼盖舒适度评价。
[Abstract]:In recent years, with the application of lightweight and high-strength materials, the progress of structural analysis and design technology, the development of construction technology, the development of structural form towards the direction of long span, flexible system and low damping, the vertical natural vibration frequency of floor becomes lower and lower. The mass and damping are getting smaller and smaller. Under the normal human activity, the vibration response of the floor increases. When the vibration of the floor reaches a certain level, it will bring trouble and discomfort to the users, even cause panic, and affect the normal function of the building. With the development of social economy and the improvement of people's living standard, people's demands on quality of life are higher and higher. Accordingly, the requirement of vibration comfort of floor is also higher and higher. If the problem of comfort of floor is discovered after the building is built, Repair after the technical difficulty and high cost. Therefore, the floor design should not only meet the requirements of strength and deformation, but also fully consider the comfort. With the development of construction industrialization, the industrialized prefabrication and assembly construction of building parts are regarded as a direction of construction industry in developed countries. The prefabricated steel structure building accords with the national green building and the industrialization development strategy of the building, and has been greatly developed in recent years. As a new type of floor, prefabricated integrated floor has the advantages of modular design, standardization of production, highly integrated function, fast construction speed and good technical and economic benefits. Because the new floor adopts light weight and high strength material and new construction technology, the integrity and rigidity of floor are decreased, and the possibility of producing comfort degree problem is increased. Therefore, it is very necessary to carry out the research on the comfort degree of the new floor. In this paper, the man-made vibration comfort of prefabricated integrated floor is studied under the engineering background of the far-sized Tiancheng City. The main contents are as follows: (1) the history and present situation of the research on the vibration comfort of the floor at home and abroad are introduced. The problems existing at present are pointed out, and the theory of floor man induced vibration comfort is introduced from three aspects: the theory of human excitation force, the theory of forced vibration and the evaluation standard of comfort degree. It lays a theoretical foundation for the analysis of the comfort degree of the new prefabricated integrated floor. (2) the human induced vibration comfort test is carried out on the atrium floor of the far-sized celestial city. The dynamic characteristics of the floor and the vertical vibration response of the floor under the action of pedestrian load are obtained. The influence of load type, load frequency, travel route and crowd size on the vertical vibration of the floor is analyzed. (3) the finite element software SAP 2000 is used. In this paper, the vertical vibration of the atrium floor is simulated by two different loading methods: the walking route method and the fixed-point excitation method. The calculated results are compared with the experimental values, and the finite element method is used to simulate the vertical vibration of the atrium floor. The influence of load frequency and connections between main plates on the vertical vibration dynamic response of floor is further studied. (4) combined with the Technical Specification for concrete structures of High-rise Building (JGJ3-2010) and AISC Code of USA, the evaluation criteria for comfort degree of this paper are determined. The comfort degree of the atrium floor is evaluated.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU312.1

【参考文献】