考虑楼梯影响的钢筋混凝土框架结构抗震性能数值分析

发布时间：2018-01-12 07:29

本文关键词：考虑楼梯影响的钢筋混凝土框架结构抗震性能数值分析　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：楼梯作为建筑物中传统的竖向交通和紧急疏散通道,其重要性不言而喻。在地震作用下,楼梯间往往先于主体结构破坏前破坏,影响其作为安全通道的使用。现行框架结构设计中仅将楼梯间开洞处理,将楼梯构件以荷载的形式输入到相应的结构构件上进行整体分析,一般不考虑楼梯参与框架结构的整体计算。然而,国内外地震灾害的现象表明,楼梯间的存在明显影响了框架结构抗震性能,所以考虑楼梯间对框架结构体系在地震作用下的影响需要进一步的研究。本文以某六层钢筋混凝土框架结构为依托,采用结构分析软件Midas/Gen建立了三组共六个不同的框架结构模型,三组模型采用不同的楼梯间布置形式。每组内一个模型不考虑楼梯间参与框架结构的整体的计算,以此作为对照研究楼梯对框架机构的抗震性能的影响,对这三组框架结构进行了模态分析、反应谱分析、弹性时程分析及弹塑性分析。对比了框架结构在考虑与不考虑楼梯进行整体分析时,结构整体抗震性能和结构构件受力变化、研究了不同的楼梯布置形式对抗震性能的影响以及楼梯构件受力的不同。文章最后总结研究成果,对楼梯构件设计方法和考虑楼梯的整体结构设计方法给出了建议。
[Abstract]:Staircase, as the traditional vertical traffic and emergency evacuation passage in buildings, is very important. Under earthquake, the stairwell is destroyed before the main structure. Affecting its use as a safe passage. In the current frame structure design, only the stair opening is treated, and the stair members are input to the corresponding structural members in the form of load for overall analysis. Generally speaking, stairs are not taken into account in the whole calculation of frame structure. However, the phenomenon of earthquake disaster at home and abroad shows that the existence of staircase has a significant impact on the seismic performance of frame structure. Therefore, considering the influence of staircase on the frame structure system under seismic action needs further research. This paper is based on a six-story reinforced concrete frame structure. Three groups of six different frame structure models are established by using the structure analysis software Midas/Gen. Three groups of models adopt different stairway layout. One model in each group does not consider the stair space involved in the overall calculation of the frame structure, as a control study of the impact of staircase on the seismic performance of the frame mechanism. Modal analysis, response spectrum analysis, elastic time history analysis and elastic-plastic analysis are carried out for these three groups of frame structures. The seismic behavior of the whole structure and the stress change of the structural members are studied. The influence of different staircase layout on the seismic performance and the different stress of the stair members are studied. Finally, the research results are summarized. The design method of stair component and the whole structure design method considering stair are suggested.
【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】：TU375.4;TU352.11

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