考虑基础的高层建筑风效应流固耦合分析
发布时间：2018-12-27 11:21
【摘要】：随着高层建筑的普及,高层建筑风工程的研究日臻成熟,高层建筑的高度不断翻新,人类在文明史上不断创造新的奇迹。高层建筑对风荷载的敏感性,使得风载成为高层设计中不容忽视的主要荷载之一。高层结构风致响应分析是近年来高层建筑研究的小热点,其工程意义不言而喻。但是目前针对高层的风致响应分析中,大多学者只是针对性的研究上部结构的抗风问题,忽略了高层建筑基础对上部结构的影响。目前高层建筑大多有庞大的箱型基础,在进行高层建筑风效应分析时,忽略底部的基础会对整体结构的研究结果产生不容忽视影响。本文以流固耦合的方式对高层建筑的风效应进行分析,本文流场采用大涡模拟模型来进行模拟,并对流场模型施加脉动风速。在第二章中,针对大涡模拟三种不同的亚格子模型进行了 CFD分析,对比选择合适的亚格子模型,经过CAARC刚性模型的常态风模拟之后,选择动力亚格子模型作为后文的分析模型。而后第三章以CAARC模型为基础,建立四种不同的结构模型,分别为:不考虑基础的结构模型、基础平面面积为上部结构1倍、2.25倍和4倍的模型,并对每种模型在脉动风下的位移响应、加速度响应、内力响应及结构表面风压进行了对比分析。分析得出在高层进行承载力分析时,不考虑基础与结构的相互作用对结构计算的结果是有利的,但对于高层结构的位移控制和舒适度控制方面,不考虑基础的作用对于控制结果是不利的。为了使得高层建筑更加适宜于人类生活的需要以及节约建筑材料,本文建议在高层结构进行设计时将基础考虑到结构模型中,以整体模型为基础进行设计,再针对上部结构进行承载力检验。本文第五章以某一高层实例为研究对象,分析了其在脉动风下的响应,发现对于不同的结构体系,基础的影响程度不同。但总体而言,在进行高层建筑风效应分析时建议考虑基础结构的整体性。高层建筑对风的敏感性不容忽视,高层建筑基础与上部结构的相互作用也会对其风效应产生不容忽视的影响,本文将不同的模型进行了对比,为工程设计提出设计时考虑基础-结构的整体性的建议,以使得高层不仅满足承载力要求还保证有足够的舒适度。
[Abstract]:With the popularization of high-rise buildings, the study of high-rise building wind engineering is maturing day by day, the height of high-rise building is constantly renovated, and human beings create new miracles in the history of civilization. The sensitivity of tall buildings to wind load makes wind load one of the main loads that can not be ignored in high-rise design. Wind-induced response analysis of high-rise structures is a small hot spot in recent years, and its engineering significance is self-evident. However, in the analysis of wind-induced response of high-rise buildings, most scholars only study the wind-resistant problem of superstructure and ignore the influence of high-rise building foundation on superstructure. At present, most high-rise buildings have large box foundations. When analyzing the wind effect of high-rise buildings, neglecting the foundation at the bottom can not be ignored to the research results of the whole structure. In this paper, the wind effect of high-rise building is analyzed by fluid-solid coupling. In this paper, the large eddy simulation model is used to simulate the flow field, and the flow field model is applied to apply pulsating wind speed. In the second chapter, the CFD analysis of three different sublattice models of large eddy simulation is carried out, and the appropriate sub-lattice model is compared. After the normal wind simulation of the CAARC rigid model, the dynamic sub-lattice model is chosen as the later analysis model. In the third chapter, based on CAARC model, four different structural models are established, which are: the structural model without considering foundation, the model with a plane area of 1, 2. 25 and 4 times of that of the superstructure, respectively, in which the plane area of the foundation is 1 times, 2. 25 times and 4 times of that of the superstructure. The displacement response, acceleration response, internal force response and surface wind pressure of each model under pulsating wind are compared and analyzed. When carrying out carrying capacity analysis of high-rise building, it is beneficial to the result of structure calculation without considering the interaction between foundation and structure, but it is beneficial to the displacement control and comfort control of high-rise structure. It is disadvantageous to control the result without considering the function of foundation. In order to make the high-rise building more suitable to the needs of human life and to save building materials, this paper suggests that the foundation should be taken into account in the design of the high-rise structure, and the design should be based on the integral model. Then the bearing capacity of the superstructure is tested. In the fifth chapter, we take a high level example as the research object, analyze its response under the pulsating wind, and find that the influence degree of foundation is different for different structure system. But overall, it is suggested that the integrity of infrastructure should be considered in the analysis of wind effect of high-rise buildings. The sensitivity of high-rise building to wind can not be ignored, and the interaction between foundation and superstructure of high-rise building will also have an important influence on wind effect. The different models are compared in this paper. In order to make the high-rise meet not only the requirement of bearing capacity but also the sufficient comfort, it is suggested that the integrality of foundation and structure should be taken into account in the design of engineering design.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.32
[Abstract]:With the popularization of high-rise buildings, the study of high-rise building wind engineering is maturing day by day, the height of high-rise building is constantly renovated, and human beings create new miracles in the history of civilization. The sensitivity of tall buildings to wind load makes wind load one of the main loads that can not be ignored in high-rise design. Wind-induced response analysis of high-rise structures is a small hot spot in recent years, and its engineering significance is self-evident. However, in the analysis of wind-induced response of high-rise buildings, most scholars only study the wind-resistant problem of superstructure and ignore the influence of high-rise building foundation on superstructure. At present, most high-rise buildings have large box foundations. When analyzing the wind effect of high-rise buildings, neglecting the foundation at the bottom can not be ignored to the research results of the whole structure. In this paper, the wind effect of high-rise building is analyzed by fluid-solid coupling. In this paper, the large eddy simulation model is used to simulate the flow field, and the flow field model is applied to apply pulsating wind speed. In the second chapter, the CFD analysis of three different sublattice models of large eddy simulation is carried out, and the appropriate sub-lattice model is compared. After the normal wind simulation of the CAARC rigid model, the dynamic sub-lattice model is chosen as the later analysis model. In the third chapter, based on CAARC model, four different structural models are established, which are: the structural model without considering foundation, the model with a plane area of 1, 2. 25 and 4 times of that of the superstructure, respectively, in which the plane area of the foundation is 1 times, 2. 25 times and 4 times of that of the superstructure. The displacement response, acceleration response, internal force response and surface wind pressure of each model under pulsating wind are compared and analyzed. When carrying out carrying capacity analysis of high-rise building, it is beneficial to the result of structure calculation without considering the interaction between foundation and structure, but it is beneficial to the displacement control and comfort control of high-rise structure. It is disadvantageous to control the result without considering the function of foundation. In order to make the high-rise building more suitable to the needs of human life and to save building materials, this paper suggests that the foundation should be taken into account in the design of the high-rise structure, and the design should be based on the integral model. Then the bearing capacity of the superstructure is tested. In the fifth chapter, we take a high level example as the research object, analyze its response under the pulsating wind, and find that the influence degree of foundation is different for different structure system. But overall, it is suggested that the integrity of infrastructure should be considered in the analysis of wind effect of high-rise buildings. The sensitivity of high-rise building to wind can not be ignored, and the interaction between foundation and superstructure of high-rise building will also have an important influence on wind effect. The different models are compared in this paper. In order to make the high-rise meet not only the requirement of bearing capacity but also the sufficient comfort, it is suggested that the integrality of foundation and structure should be taken into account in the design of engineering design.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU973.32
【参考文献】
相关期刊论文 前10条
1 刘思为;;结构风工程的现状与发展[J];建材与装饰;2016年37期
2 李永贵;李秋胜;戴益民;;矩形截面高层建筑扭转向脉动风荷载数学模型[J];工程力学;2015年06期
3 王钦华;张乐乐;喻莹;王孔锴;;典型截面超高层建筑风洞试验与荷载规范计算的等效静力风荷载比较分析[J];建筑结构;2015年02期
4 黄剑;顾明;;均匀风场中矩形单体高层建筑风致响应的阻塞效应[J];建筑结构;2015年02期
5 商怀忠;陈水福;叶发永;李传奇;;基于风洞试验的高层建筑钢结构风致加速度研究[J];建筑技术;2014年02期
6 李正农;郝艳峰;刘申会;;不同风场下高层建筑风效应的风洞试验研究[J];湖南大学学报(自然科学版);2013年07期
7 顾明;张正维;全涌;;降低超高层建筑横风向响应气动措施研究进展[J];同济大学学报(自然科学版);2013年03期
8 邹良浩;梁枢果;汪大海;熊铁华;;基于风洞试验的对称截面高层建筑三维等效静力风荷载研究[J];建筑结构学报;2012年11期
9 关壮;洪运;盛一凡;;地震及风荷下高层隔震结构舒适度分析[J];低温建筑技术;2012年05期
10 邹W，
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