地下室顶板有效刚度对高层建筑嵌固的研究

发布时间：2018-09-19 16:38

【摘要】：高层建筑在计算分析时,结构的嵌固端是一个非常重要假定,嵌固端位置的不同,不仅影响着结构内力计算,而且对工程造价影响也较大。在工程设计中,常考虑地下室顶板作为结构嵌固端,但是,由于建筑使用功能的需要,地下室部分竖向构件的间距变得更大,形成大空间、大柱网的建筑结构,此时的地下室顶板的嵌固作用有待明确。当前研究中,关于地下室顶板的有效刚度对结构嵌固作用影响的研究相对匮乏,因此常常带来结构设计错误或者不妥。基于上述情况,本文通过理论分析和算例分析,根据有限元分析软件,调整地下室一定范围内的刚度,达到地下室顶板满足嵌固的作用。因此,本文的主要研究内容和成果包括:(1)通过文献的阅读,总结了当前高层建筑嵌固端的研究现状,归纳了目前关于结构嵌固作用的研究成果和规范规定,指出了当前研究的不足和疏漏,为设计人员的参阅和研究人员的深化分析提供了支持。(2)楼板的刚度对结构整体分析有一定的影响因素,论文分析归纳楼板刚度的影响因素,并且分别从楼板厚度、开洞率以及次梁布置三方面研究其对楼板刚度的影响。(3)分析地下室刚度有效范围的影响因素及其规律,考虑地下室投影面积、上部塔楼的位置和水平连接构件刚度对其影响,并得到相关的结论。(4)综合考虑楼板刚度以及地下室刚度的有效范围,结合工程实例,研究地下室有效刚度对高层建筑的动力特性、变形特性以及内力特性的影响。(5)通过有限元分析软件Midas-Building,对带地下室的高层建筑进行了动力弹性分析,研究了地下室有效刚度对结构嵌固的影响,指出地下室可以通过调整地下室顶板及有效范围内抗侧刚度使其达到嵌固的作用。
[Abstract]:In the calculation and analysis of high-rise building, it is a very important assumption that the fixed end of the structure is not only affected by the calculation of the internal force of the structure, but also has a great influence on the project cost. In the engineering design, the basement roof is often considered as the embedded end of the structure. However, due to the need of the function of the building, the distance between the vertical members of the basement becomes larger, forming a large space, large column net building structure. At this time the basement roof of the inlay effect to be clear. In the current research, the research on the effect of effective stiffness of basement roof on the inlay effect of the structure is relatively scarce, so it often leads to the wrong or improper design of the structure. Based on the above situation, this paper adjusts the stiffness of the basement in a certain range by theoretical analysis and example analysis, according to the finite element analysis software, so that the basement roof can satisfy the function of embedding. Therefore, the main research contents and achievements of this paper are as follows: (1) through the reading of the literature, this paper summarizes the current research status of the embedded ends of high-rise buildings, and summarizes the current research results and specifications on the role of structural inlay. The deficiencies and omissions of current research are pointed out, which provide support for designers' reference and further analysis of researchers. (2) the stiffness of floor slab has certain influence factors on the overall analysis of structure, and the paper analyzes and sums up the influencing factors of floor stiffness. The effects of floor thickness, opening rate and secondary beam arrangement on the floor stiffness are studied respectively. (3) the effective range of basement stiffness is analyzed, and the projection area of basement is considered. The position of the upper tower and the stiffness of the horizontal connection member affect it, and the relevant conclusions are obtained. (4) considering the effective range of the floor stiffness and the basement stiffness, combined with the engineering example, The effect of effective basement stiffness on dynamic characteristics, deformation characteristics and internal force characteristics of high-rise buildings is studied. (5) dynamic elastic analysis of high-rise buildings with basement is carried out by finite element analysis software Midas-Building,. The effect of effective stiffness of basement on structural inlay is studied. It is pointed out that the basement can achieve the function of embedding by adjusting the basement roof and the anti-lateral stiffness in the effective range.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU93;TU973.2

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