某超限框筒结构的外框柱研究

发布时间：2018-09-06 14:06

【摘要】：筒体结构作为一种特殊的结构形式,具有结构抗侧刚度大,受力合理,使用空间灵活等特点,特别适合超高层建筑结构。而框架核心筒结构因其同时具有框架和剪力墙的优点,在办公类建筑中使用颇为普遍。本文以某超限框架-核心筒结构为例,采用PKPM结构软件建模和结构分析,从以下几个方面对整体结构以及结构中的外框柱进行研究和探讨:1.对整体结构采用了satwe程序进行了多遇地震下的弹性计算分析。分析结果表明:各项计算指标均满足规范要求,结构布置合理,能够达到“小震不坏”的抗震设防目标;2.在对结构整体分析的基础上,对结构二道防线剪力分担比进行了分析。分析结果表明:在多遇地震作用下,结构以核心筒剪力墙为主要抗侧力体系,外框架剪力分担比也满足规范要求,能够保证外框柱发挥第二道防线的作用;3.针对结构中的外框柱进行了设防烈度下的抗震性能设计,设计结果能够达到预期的抗震性能目标;4.针对结构中的外框柱还进行了罕遇地震下的抗震性能设计,设计结果能够满足性能化要求;5.对整体结构采用pushover进行了推覆分析,分析结果表明:结构在罕遇地震作用下的变形能力和抗倒塌能力良好,满足“大震不倒”的抗震目标;6.在对整体结构推覆的基础上,对结构中带穿层柱的一榀框架进行了推覆分析,分析结果表明:穿层柱不会先于其他柱出铰。综合以上探讨研究,框架核心筒中外框柱作为第二道抗震防线具有良好的受力性能和变形能力,能够充分发挥其作为第二道抗震防线的作用,可供同类工程参考。
[Abstract]:As a special structural form, the tubular structure has the characteristics of large lateral stiffness, reasonable force, flexible space, etc. It is especially suitable for super high-rise building structure. The frame core tube structure is widely used in office buildings because of its advantages of both frame and shear wall. In this paper, taking a frame-core tube structure as an example, PKPM structural software is used to model and analyze the structure. The whole structure and the outer frame column in the structure are studied and discussed from the following aspects. Satwe program is used to calculate and analyze the elasticity of the whole structure under frequent earthquakes. The analysis results show that all the calculation indexes meet the requirements of the code, the structure arrangement is reasonable, and the seismic fortification target of "small earthquake is not bad" can be reached. Based on the analysis of the whole structure, the shear sharing ratio of the two lines of the structure is analyzed. The results show that under the frequent earthquake, the core tube shear wall is used as the main lateral force resistance system, and the shear sharing ratio of the outer frame meets the requirements of the code, which can ensure that the outer frame column can play the role of the second line of defense. The seismic performance of the outer frame column in the structure is designed under the fortification intensity, and the design result can reach the expected seismic performance target. The seismic performance design of the outer frame column in the structure under rare earthquake is also carried out, and the design results can meet the requirements of performance. The pushover push-over analysis of the whole structure is carried out. The results show that the deformation ability and anti-collapse ability of the structure under rare earthquake are good, and the anti-collapse ability of the structure is satisfied with the seismic target of "large earthquake does not collapse". On the basis of pushing the whole structure, a frame with a cross story column in the structure is analyzed. The analysis results show that the perforated column will not come out of the hinge before the other columns. Synthesizing the above research, the outer frame column in the frame core tube as the second seismic defense line has good mechanical performance and deformation ability, and can give full play to its function as the second seismic defense line, which can be used as reference for similar projects.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TU973.17

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