楼梯对高层框架结构抗震性能的影响分析
发布时间：2018-08-11 12:16
【摘要】：即使电梯已被广泛应用于高层框架结构体系,但楼梯结构作为建筑房屋的竖向垂直交通通道,其重要性在高层建筑结构中却是不言而喻。在历次的震后调查中发现,在很多主体高层框架结构完好的情况下,楼梯及楼梯间却遭到了严重的破坏。使得本身担任逃生角色的楼梯,并未在自然灾害面前发挥其应急安全疏散的功能。汶川地震和玉树大地震后,国内的专家学者发表的一系列文章中说明在框架结构中,楼梯的存在改变了整体结构的刚度分布,使得与楼梯相连的主要结构构件的受力状态和整体变形出现了明显变化,楼梯对整体结构的空间工作性能影响较大。因此,建设部2008年7月在《建筑抗震设计规范》(GB50011-2010)中第3.6.6条明确提出：“计算模型的建立、必要的简化计算与处理,应符合结构的实际工作状况,计算中应考虑楼梯构件的影响”。本文在总结历次地震中楼梯间震害的基础上,以一栋10层钢筋混凝土高层框架结构为研究对象,利用有限元结构设计分析软件ETABS分别建立了有无楼梯模型和楼梯布置在不同位置的高层框架结构模型,并利用振型分解反应谱法和时程分析法对各模型进行计算分析。结果显示：楼梯对高层框架结构的自振特性、整体变形及框架构件的内力影响较大；楼梯结构构件(梯段板、梯柱、平台梁)在水平双向地震作用下的受力及整体变形均有明显改变,同时顺梯段板布置(Y)方向的地震作用影响较垂直梯段板布置(X)方向大;楼梯位置的变化对高层框架结构的自振特性、整体变形和受力状态均有较大的影响；归纳总结研究成果针对性的提出楼梯设计的建议。
[Abstract]:Even though elevators have been widely used in high-rise frame structure system, the importance of staircase structure, as the vertical traffic passage of the building, is self-evident in the high-rise building structure. In the past post-earthquake investigation, it is found that the staircase and stairwell have been severely damaged under the condition that many main high-rise frame structures are intact. The staircase, which acts as an escape role, does not play its emergency evacuation function in the face of natural disasters. After the Wenchuan earthquake and the Yushu earthquake, a series of articles published by domestic experts and scholars showed that in the frame structure, the existence of stairs changed the stiffness distribution of the whole structure. The stress state and overall deformation of the main structural members connected with the staircase are obviously changed, and the stair has a great influence on the spatial working performance of the whole structure. Therefore, in July 2008, the Ministry of Construction clearly stated in the Code for aseismic Design of buildings (GB50011-2010) that: "the establishment of the calculation model, the necessary simplified calculation and treatment, should conform to the actual working conditions of the structure," The influence of staircase members should be taken into account in the calculation. " On the basis of summing up the earthquake damage of staircase in previous earthquakes, this paper takes a 10-story reinforced concrete high-rise frame structure as the research object. Using the finite element structural design analysis software ETABS, the model of tall frame structure with or without staircase and stair arrangement in different positions is established, and the modal decomposition response spectrum method and time-history analysis method are used to calculate and analyze each model. The results show that the staircase has a great influence on the natural vibration characteristics, integral deformation and internal force of the frame members. The stress and deformation of platform beam under horizontal and bidirectional earthquake are obviously changed, and the seismic effect of (Y) direction along the ladder section is greater than that of the vertical (X) direction. The change of stair position has great influence on the natural vibration characteristics, overall deformation and stress state of high-rise frame structure, and summarizes the research results and puts forward some suggestions for staircase design.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.15;TU973.31
本文编号：2176966
[Abstract]:Even though elevators have been widely used in high-rise frame structure system, the importance of staircase structure, as the vertical traffic passage of the building, is self-evident in the high-rise building structure. In the past post-earthquake investigation, it is found that the staircase and stairwell have been severely damaged under the condition that many main high-rise frame structures are intact. The staircase, which acts as an escape role, does not play its emergency evacuation function in the face of natural disasters. After the Wenchuan earthquake and the Yushu earthquake, a series of articles published by domestic experts and scholars showed that in the frame structure, the existence of stairs changed the stiffness distribution of the whole structure. The stress state and overall deformation of the main structural members connected with the staircase are obviously changed, and the stair has a great influence on the spatial working performance of the whole structure. Therefore, in July 2008, the Ministry of Construction clearly stated in the Code for aseismic Design of buildings (GB50011-2010) that: "the establishment of the calculation model, the necessary simplified calculation and treatment, should conform to the actual working conditions of the structure," The influence of staircase members should be taken into account in the calculation. " On the basis of summing up the earthquake damage of staircase in previous earthquakes, this paper takes a 10-story reinforced concrete high-rise frame structure as the research object. Using the finite element structural design analysis software ETABS, the model of tall frame structure with or without staircase and stair arrangement in different positions is established, and the modal decomposition response spectrum method and time-history analysis method are used to calculate and analyze each model. The results show that the staircase has a great influence on the natural vibration characteristics, integral deformation and internal force of the frame members. The stress and deformation of platform beam under horizontal and bidirectional earthquake are obviously changed, and the seismic effect of (Y) direction along the ladder section is greater than that of the vertical (X) direction. The change of stair position has great influence on the natural vibration characteristics, overall deformation and stress state of high-rise frame structure, and summarizes the research results and puts forward some suggestions for staircase design.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU973.15;TU973.31
【参考文献】
相关期刊论文 前3条
1 苏启旺;蔡宏儒;李力;;从“汶川大地震”引发对板式楼梯设计的思考[J];四川建筑科学研究;2008年04期
2 代红军;祁皑;;基于ETABS的钢筋混凝土框架与楼梯共同工作性能分析[J];地震工程与工程振动;2009年06期
3 王威;薛建阳;章红梅;周颖;谢启芳;李方圆;;框架结构在汶川5.12大地震中的震害分析及抗震启示[J];世界地震工程;2009年04期
，本文编号：2176966
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