【作者】 陈旭；

【导师】 刘焱； 方继忠；

【作者基本信息】 东南大学 ， 建筑与土木工程（专业学位）， 2022， 硕士

【摘要】 建筑非结构构件是现代建筑系统的重要组成部分,也是建筑系统实现基本功能的重要基础保障。而管道系统作为建筑非结构构件的重要组成,对于保证社会资料生产、保障居民生活起着至关重要的作用。近年来,我国学者对各种建筑结构的振动响应和振动控制理论与方法进行了广泛深入研究,但多限于建筑结构本体。对建筑内部管道系统的振动破坏和控制也仅限于一般性抗震支架研究。而对各类给水、排水、消防等复杂的管道系统及其抗震支架缺乏更加深入的振动响应、破坏和控制分析研究。本课题从给排水专业角度出发,结合建筑结构抗震理论和研究方法,提出了基于柔性抗震理念的建筑竖向管道抗震技术,并借助有限元仿真等手段对所研发的建筑竖向管道柔性抗震装置进行了较为深入的分析和研究。主要包括以下内容:系统性地讨论和总结了国内外建筑非结构构件抗震研究和相关技术的发展。建立了建筑结构振动模型并据此推导了建筑结构的振动微分方程,采用杜哈梅积分对所建立的振动微分方程进行求解并据此推导和讨论了建筑结构抗震设计所采用的设计楼面谱法。同时还推导了《建筑机电工程抗震设计规范GB50981-2014》中关于求解建筑非结构构件由自重导致的地震惯性力的等效侧力法。讨论和介绍了拟静力加载实验及其常用的加载制度,以及有限元仿真分析方法。确立了本课题的建筑结构-管道系统受力分析基本模型,并进一步建立了一个9层钢筋混凝土框架结构作为振动响应分析结构。根据我国抗震设计规范相关规定,在PEER地震波数据库的子库NGA-West2中遴选了5条天然地震波并生成了2条人工地震波,采用上述地震波对所建立的9层钢筋混凝土框架结构进行了振动响应分析,并根据后续研究需要提取了响应结果。设计了一种基于柔性抗震理念的新型竖管柔性抗震支架,同时选择一种传统竖管抗震支架作为其对照组并对二者进行了拟静力有限元仿真加载实验。分析结果表明,所提出的新型竖管柔性抗震支架具有优秀的缓震、消能能力。在此基础上进一步讨论了柔性材料厚度对新型竖管柔性抗震支架抗震性能的影响并确定了最佳柔性材料厚度。提出了一种基于柔性抗震理念的新型竖管柔性隔震层穿越装置。对所提出的新型竖管柔性隔震层穿越装置进行了拟静力有限元仿真加载实验,结果表明,该装置具有改变竖向管道重力分布、降低应力集中和缓震的能力。在此基础上,讨论了柔性材料厚度对新型竖管柔性隔震层穿越装置抗震性能的影响并确定了最佳柔性材料厚度范围。为了深入讨论传统竖管系统和柔性竖管系统与建筑结构之间的相互作用、考察柔性抗震装置在地震中的抗震表现,基于9层钢筋混凝土框架结构与各抗震装置的仿真分析模型,又分别建立了建筑结构-传统竖管系统振动响应模型和建筑结构-柔性竖管系统振动响应模型。建筑结构加速度时程曲线的分析结果表明,管道系统作为建筑附属结构和非结构构件会影响建筑结构的振动响应,使得建筑结构加速度响应降低。新型竖管柔性抗震支架和传统竖管抗震支架的变形位移时程曲线和剪力时程曲线的分析结果表明,新型竖管柔性抗震支架所受剪力小于传统竖管抗震支架,直观地展示了新型竖管柔性抗震支架优秀的抗震表现,随后又进一步从系统振动响应角度讨论了其抗震机理。更多还原

【Abstract】 Non-structural components of building are important parts of building system and regarded as important guarantee for realizing basic functions of building system.As a typical non-structural component of the building,the piping system plays an important role in ensuring the production of social means and guaranteeing the basic life of residents.In recent years,the vibration response and vibration control theories of building structures have been studied extensively and deeply by domestic scholars,but most of the research are limited to the main structure of buildings.Some research about vibration damage and control of building internal pipeline system are also limited to general seismic support.However,analysis and study on vibration response,damage,and control of pipelines system like water-supply pipeline,drainage pipeline,fire protection pipeline and other complex pipeline systems and their seismic supports are lacking.A kind of flexible vertical pipeline seismic technology and the related mechanical properties study have been carried out based on seismic techniques for non-structural components of building and building structure vibration response with the help of finite element simulation pseudo-static experiment.The following contents are mainly included.The development of seismic research,technology,related standards,and guidelines for building’s non-structural components at home and abroad has been systematically discussed and summarized.The vibration model of building structure is established,and its vibration differential equation is derived.Duhamel integral is used to solve the vibration differential equation,then the floor spectrum method used in seismic design of building structure is deduced and discussed.Furthermore,according to the solution of the vibration differential equation,the Equivalent Static Method for solving the seismic inertia force caused by dead weight of non-structural parts of buildings in Code for Seismic Design of Mechanical and Electrical Equipment GB50981-2014 is deduced.The low cycle reciprocating load test and its usual loading regime are discussed,and the finite element simulation analysis is further discussed as well.The basic model of building structure-pipeline system is established.And a 9-story reinforced concrete frame structure is established as a vibration response analysis structure.According to the seismic design code and related regulations,five natural seismic waves are selected in the PEER NGA-West2 seismic database,and two artificial seismic waves are generated as well.The vibration response of the building structure is analyzed by using the above seismic waves in the established 9-story reinforced concrete frame structure.And the response results were extracted according to the needs of further research.A new flexible aseismic support for vertical pipeline is proposed.At the same time,a traditional vertical pipeline support was selected as the control group and the pseudo-static finite element simulation loading experiment is carried out for the two supports.The analysis results show that the new flexible seismic support has excellent damping and energy dissipation capability.The influence of the thickness of flexible material on the seismic performance of the new flexible seismic support is further discussed and the optimal thickness of flexible material is determined.A new flexible isolation layer traversing device for vertical pipeline is proposed.The pseudo-static finite element simulation loading experiment is carried out on the proposed new flexible vibration isolator for vertical pipe.And the analysis results show that the proposed new flexible vibration isolator can change the gravity distribution of vertical pipe,reduce the stress concentration,and decrease the vibration.On this basis,the influence of the thickness of flexible material on the seismic performance of the new riser flexible isolation layer traversing device is discussed and the optimal range of the thickness of flexible material is determined.For further discussion of the interactions between the traditional vertical pipeline system and structure,and the interaction between the flexible vertical pipeline system and structure,and the seismic performance of flexible vertical pipeline seismic devices in the earthquake,a building structure – traditional pipeline system time history model and a building structure –flexible vertical pipeline system time history model are established based on the 9 layer reinforced concrete frame structure and the finite element analysis for the seismic devices.The analysis results of the acceleration time history curve of building structure show that the addition of pipeline system will affect the vibration response of building structure,which may reduce the acceleration response of building structure.And the analysis of deformation and shear displacement time history curve of new flexible aseismic support for vertical pipeline and traditional aseismic support for vertical pipeline show that the shear of new flexible aseismic support for vertical pipeline is less than the traditional aseismic support,which further verifies the good aseismatic ability of new flexible aseismic support for vertical pipeline.And the internal mechanism is further discussed.更多还原