大跨建筑结构非结构构件动力性能研究

发布时间：2018-04-24 00:29

本文选题：非结构构件 + 传递函数法　；参考：《天津大学》2014年硕士论文

【摘要】：非结构构件是建筑中结构以外的所有构件,大跨建筑结构中的非结构构件主要有马道、风管、灯具、音箱、吊顶等屋面吊挂物,在使用中非结构构件有其不可或缺的功能,但多次的震害报告显示,地震中破坏最严重、造成最多损失的往往不是主体结构,而是非结构构件,所以非结构构件的动力性能研究十分必要。目前对于非结构构件的研究多是在框架结构中的,所用的方法主要是等效侧力法和楼面反应谱法,对于动力性能更加复杂的大跨建筑结构及其非结构构件的研究则比较滞后。本文首先利用振型分解反应谱法结合传递函数法的思路推导了平板结构单点连接单自由度非结构构件的频域位移公式和频域连接力公式,之后利用拟夹层板法将已得到的公式拓展到网架结构单点连接单自由度非结构构件上,随后验证了理论公式的正确性,并进行了参数化分析,研究了耦合结构的频域动力响应关于附属结构与主体结构频率比、质量比的变化规律以及主体结构频域位移减小程度,最后对网架耦合结构进行了地震时程分析的研究,得到了如下结论:1)频率比接近1时,频率调谐作用增强,附属结构响应增大;2)质量比增大,频率调谐作用增强,附属结构响应减小;3)当频率比在1左右,主体结构位移减小幅度一般可达40%;当主附结构的频率比偏离1时,随着主附结构质量比的减小,主体结构的位移减小幅度降低;当频率比为0.7~0.8或1.1~1.2,质量比在0.01~0.02内主体结构位移减小幅度为10%~20%。
[Abstract]:The unstructured members are all the members except the structure in the building. The non-structural members in the long-span building structure mainly have the roof hanging objects such as the track, the air pipe, the lamps, the speakers, the suspended roof and so on. The non-structural members have their indispensable function in using the non-structural members. However, many earthquake damage reports show that the damage is the most serious in the earthquake, and the most damage is caused not by the main structure, but by the non-structural members, so it is necessary to study the dynamic performance of the non-structural members. At present, the research of non-structural members is mostly in the frame structure, the main methods are the equivalent lateral force method and the floor response spectrum method, but the study of the long-span building structure and its non-structural members with more complex dynamic performance is lagging behind. In this paper, the frequency-domain displacement formula and frequency-domain connection force formula of single point connection single degree of freedom non-structural member of flat plate structure are derived by using mode decomposition response spectrum method and transfer function method. Then the formula is extended to single point connection and single degree of freedom nonstructural members by using the pseudo-sandwich plate method. The correctness of the theoretical formula is verified and parameterized analysis is carried out. The frequency domain dynamic response of coupled structures is studied. The variation law of frequency ratio, mass ratio and frequency domain displacement of the main structure are studied. Finally, the seismic time history analysis of the coupled grid structure is carried out. The following conclusions are obtained: 1) when the frequency ratio is close to 1, the frequency tuning effect increases, the satellite structure response increases and the frequency tuning ratio increases, the frequency tuning effect increases, and the satellite structure response decreases when the frequency ratio is about 1. When the frequency ratio of the main structure deviates from 1, the displacement of the main structure decreases with the decrease of the mass ratio of the main structure. When the frequency ratio is 0.7 ~ 0.8 or 1.1 ~ (-1) ~ (1.2) and the mass ratio is 0.01 ~ 0.02, the displacement of the main structure decreases to 10 ~ 20.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU311.3

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