某带穿层柱框架结构的抗震性能分析

发布时间：2018-03-24 09:32

本文选题：框架结构　切入点：穿层柱　出处：《安徽建筑大学》2013年硕士论文

【摘要】：随着我国经济的高速发展,城镇化的发展也越来越快,城市人口数量越来越多,在城镇涌现出大量的多层、高层建筑及超高层建筑,其中不乏形体复杂,建筑外观多样化的结构,像住宅、酒店和商场等,而商业建筑一般人流密集,建筑外部造型宏伟,内部空间宽敞,结构平面大开间,而由于共享开间又容易形成穿层柱等比较复杂的的结构形式,商业建筑的使用功能多样化,可做餐饮、娱乐、购物、休闲等于一体的综合商业,而商业建筑也可能后期改造,比如楼层内做夹层,结构整体加层改造等,这是都是工程师所必须考虑到的问题。另外近年来地震活动频繁,造成危害严重,如何保证商业建筑的抗震性能,使其满足“大震不倒”的要求,就成为商业建筑设计中必须考虑的问题。随着基于性能的抗震设计的理论被工程界所采用,对其研究和应用已成为当前工程界热点。本文以某带穿层柱框架结构商业建筑为例,结合基于性能的抗震设计进行了以下几个方面的研究工作： 1.本文结合规范要求,采用SATWE程序对合肥某商业建筑进行了小震下的振型分解反应谱法分析,补充了进行弹性时程分析,结果表明该商业建筑在小震下,有足够的安全储备,能够保证人员安全,保证“小震不坏”设防目标。 2.考虑大震下结构进入塑性,本文采用PUSHEPDA和Midas building两种弹塑性分析软件,对某商业建筑结构进行了静力弹塑性推覆分析。结果表明结构能够通过抗倒塌验算,满足“大震不到”,并且结构构件的屈服机制也满足“强柱弱梁”,同时比较了两种软件计算的差异。 3.考虑地震动下结构的真实地震响应,采用PUSHEPDA软件,对某商业建筑进行了动力弹塑性时程分析。结果表明,选取的三条地震波较为合适；结构能满足“大震不到”；并且找到结构地震下的薄弱构件,在实际设计中进行加强。 4.分析了穿层柱在大震结构进入塑性情况下的受力性能。穿层柱表现出较好的变形能力,穿层柱出铰滞后。 5.针对某商业建筑后期可能改造,加层等最不利工况的考虑,本文做了对某商业建筑改造加层后抗震性能分析,同时对比改造结构,找到结构变化部位,并且了解结构在大震下耗能,屈服机制等是否发生变化。结构表明,改造后结构同样可以满足设防水准目标,改造后结构在大震下耗能损伤机制有所改变,在设计中要考虑到结构改造后的情形进行设计。
[Abstract]:With the rapid development of our country's economy and the rapid development of urbanization, the number of urban population is increasing, and a large number of multi-storey, high-rise and super-tall buildings have emerged in cities and towns, among which the shape is complex. The architectural appearance is diversified, such as residential, hotel and shopping malls, while commercial buildings are generally densely populated, with magnificent exterior shapes, spacious interior spaces, and large flat spaces. And because sharing rooms is easy to form more complex structural forms such as crossing columns, the use of commercial buildings is diversified and can be used as a comprehensive commercial equivalent of catering, entertainment, shopping and leisure, and commercial buildings may also be transformed in the later stages. For example, making interlayer in the floor and rebuilding the structure as a whole are all problems that engineers must consider. In addition, in recent years, frequent seismic activities have caused serious harm. How to ensure the seismic performance of commercial buildings? Making it meet the requirement of "strong earthquake will not fail" has become a problem that must be considered in the design of commercial buildings. As the theory of performance-based seismic design is adopted by the engineering world, The research and application of this structure has become a hot topic in the engineering field. This paper takes a commercial building with a story-pierced column frame structure as an example and carries out the following research work in combination with performance-based seismic design:. 1. According to the requirements of the code, a commercial building in Hefei is analyzed by the mode decomposition response spectrum method under a small earthquake with SATWE program, which is supplemented by elastic time history analysis. The results show that the commercial building has sufficient safety reserves under the small earthquake. Can ensure the safety of personnel, to ensure the "small earthquake not bad" fortification target. 2. Considering the structure entering plasticity under the strong earthquake, the static elastic-plastic nappe analysis of a commercial building structure is carried out by using PUSHEPDA and Midas building software. The results show that the structure can be checked by anti-collapse calculation. In addition, the yield mechanism of structural members is also satisfied with "strong column and weak beam". The difference between the two kinds of software calculation is also compared. 3. Considering the real seismic response of the structure under ground motion, the dynamic elastic-plastic time-history analysis of a commercial building is carried out by using PUSHEPDA software. The results show that the three seismic waves selected are more suitable; The structure can satisfy the "big earthquake can not meet", and find the weak component under the structure earthquake, and strengthen in the actual design. 4. The mechanical behavior of the perforated column under the plastic condition of the strong earthquake structure is analyzed. 5. In view of the consideration of the most unfavorable working conditions, such as the possible retrofit and adding storeys of a commercial building in the later stage, this paper analyzes the seismic behavior of a commercial building after adding the storeys, compares the reconstructed structure, and finds out the changing position of the structure. It is shown that the modified structure can also meet the level goal of fortification, and the damage mechanism of the structure under the earthquake will be changed after the transformation, and whether the energy dissipation and yield mechanism of the structure will change under the strong earthquake, the structure shows that the modified structure can also meet the goal of the level of defense. In the design, we should consider the situation after the structural transformation to carry out the design.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.31

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