多层冷弯薄壁型钢住宅结构体系抗震性能研究

发布时间：2018-04-05 14:19

本文选题：冷弯薄壁型钢结构　切入点：墙体支撑　出处：《西安工业大学》2017年硕士论文

【摘要】：冷弯薄壁型钢结构具有绿色环保、施工便捷、抗震性能好等诸多优点,在国家提倡大力发展绿色建筑和装配式住宅的背景下,已经广泛应用于别墅、住宅以及灾区重建中。当今很多研究针对该结构的单个构件,对于结构整体的受力性能研究还不够深入,没形成一套成熟的理论。目前该种结构体系大都建为两层或三层,对于四层、五层、六层的结构应用很少。由于结构高度的增加,使得结构的受力变形更加复杂,从而给结构造成破坏。墙体是冷弯薄壁型钢结构中一种重要的抗剪构件,合理的墙体支撑形式可以有效增加结构的刚度,控制结构的变形。本文将结合国内外冷弯薄壁型钢结构的研究现状,利用大型有限元软件SAP2000建立三种不同形式的墙体支撑模型,比较不同模型抗震性能的优劣。然后采用一种合理墙体支撑形式,分别建立四～六层的冷弯薄壁型钢结构模型,研究不同地震作用下的结构反应,主要内容和结论如下:本文对三层无支撑墙体模型、单斜杆支撑墙体模型、人字支撑墙体模型、X形支撑墙体模型进行了动力性能分析,得到了动力性能的基本参数,研究表明:不同形式支撑的墙体对结构自振周期、振型有一定影响,其中X形支撑墙体可以有效降低结构的自振周期,提高结构的刚度,X形支撑墙体相对单杆支撑墙体其结构周期可减少14.7%。基于三种墙体支撑模型整体性能良好的情况下,对三种模型进行8度、9度多遇地震分析,研究不同支撑形式的墙体对结构顶层位移、层间位移角等指标的影响,比较各种墙体支撑抗震性能的优劣,结果表明:三种模型都能满足抗震要求,其中X形支撑墙体能有效较改善结构受力,降低结构的顶层最大位移和层间位移角,减少结构的变形,适合作为更高结构高度的墙体支撑方式。采用X形支撑墙体建立四～六层冷弯薄壁型钢结构模型,进行动力性能分析,结果表明:在该种墙体支撑下,结构整体性能良好,自振周期可以满足要求,随着结构高度增加,周期变大,六层结构自振周期比四层增加36.7%。对三种模型进行8度多遇地震分析,结果表明:在合理选择墙体的基础上,结构受力性能合理,整体性良好,当结构建到六层的时候,可以满足8度多遇地震的抗震要求。
[Abstract]:Cold-formed thin-walled steel structure has many advantages, such as green environmental protection, convenient construction, good seismic performance and so on. It has been widely used in villas, housing and reconstruction of disaster areas under the background of promoting the development of green buildings and prefabricated houses.Nowadays, many researches focus on the single member of the structure, but the research on the mechanical behavior of the whole structure is not enough, and a mature theory has not been formed.At present, this kind of structure system is mostly built into two or three stories, but it is seldom used for four, five and six stories.Because of the increase of the height of the structure, the deformation of the structure is more complicated, thus causing damage to the structure.Wall is an important shear-resistant member in cold-formed thin-walled steel structure. Reasonable wall support can effectively increase the stiffness of the structure and control the deformation of the structure.In this paper, three different types of wall bracing models are established by using the large finite element software SAP2000, and the seismic performance of different models is compared according to the current research situation of cold-formed thin-walled steel structures at home and abroad.Then, a reasonable wall bracing form is used to establish four to six layer cold-formed thin-walled steel structure models, and the main contents and conclusions are as follows: in this paper, the three-story unsupported wall model is studied.The vibration mode has certain influence, among which the X shape supporting wall can effectively reduce the natural vibration period of the structure, and the structure cycle of the X shape supporting wall can be reduced by 14. 7% compared with that of the single bar bracing wall by increasing the stiffness of the structure.Reduce the deformation of the structure, suitable for higher structural height of the wall support.The period of natural vibration of six-story structure increases 36.7 times than that of four layers.The results show that on the basis of reasonable selection of the wall, the structure has reasonable mechanical performance and good integrity. When the structure is built to the sixth floor, it can meet the seismic requirements of the earthquake of 8 degrees.
【学位授予单位】：西安工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU392.1;TU352.11

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