楼梯震害分析及考虑楼梯作用对结构的影响

发布时间：2018-04-01 21:03

本文选题：框架结构　切入点：楼梯结构　出处：《河北工程大学》2013年硕士论文

【摘要】：楼梯是十分重要的垂直交通通道。在地震作用下,楼梯的破坏比较严重,在一定程度上阻碍了人们的逃生。在汶川地震之前,在进行结构设计时,没有考虑楼梯对整体结构的影响,对楼梯的设计也只是进行简化处理,只考虑了竖向荷载,并没有对楼梯进行抗震计算,仅对其进行构造设计。实际上,在结构计算时,考虑楼梯作用对结构具有十分重要的影响。本文以框架结构的教学楼为例,建立了有楼梯的模型和无楼梯的模型,严格根据建抗震筑设计规范的要求,通过PKPM软件进行分析,主要进行以下工作： (1)对比分析楼梯参与整体结构计算,对结构的动力特性的影响,即对结构的基本运动形式、自振周期、结构位移等的影响。 (2)在地震作用下,分析板式楼梯对结构主要受力构件的内力影响。通过本文的研究,得到以下结论：在框架结构中,楼梯对整体结构具有斜撑作用,增大了结构的刚度,改变了结构的刚度分布,缩短了结构的自振周期,使得结构的位移减小,层间剪力增大,同时使得楼梯间附近框架的受力构件的内力大幅度提高。
[Abstract]:Staircase is a very important vertical traffic passageway. Under the action of earthquake, the damage of staircase is quite serious, which to some extent hinders people's escape. Before the Wenchuan earthquake, before the Wenchuan earthquake, when carrying out the structural design, The influence of staircase on the whole structure is not considered, and the design of staircase is only simplified, only the vertical load is considered, and the seismic calculation of staircase is not carried out, but only the structural design is carried out. In fact, in the calculation of structure, it is very important to consider the effect of staircase on the structure. In this paper, taking the teaching building with frame structure as an example, the model with and without staircase is established. Strictly according to the requirements of the design code for seismic construction, through the analysis of PKPM software, the main work is as follows:. 1) the influence of staircase on the dynamic characteristics of the structure, that is, the basic motion form of the structure, the period of natural vibration and the displacement of the structure, is analyzed comparatively. 2) the influence of the plate staircase on the internal force of the main structural members under earthquake is analyzed. Through the research of this paper, the following conclusions are obtained: in the frame structure, the staircase has the function of oblique support to the whole structure, which increases the stiffness of the structure, changes the stiffness distribution of the structure, and shortens the natural vibration period of the structure. The displacement of the structure is reduced and the interstory shear force is increased, while the internal force of the frame members near the stairway is greatly increased.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU311.3;TU229

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