装配式钢框架抗连续倒塌性能影响因素及分析方法对比研究

发布时间：2018-02-05 19:24

本文关键词： 拆除构件法装配式钢框架连续倒塌斜支撑 GSA2003 Do D2013　出处：《湖南大学》2015年硕士论文　论文类型：学位论文

【摘要】：装配式斜支撑节点钢框架结构是一种新型结构体系,具有生态环保、施工速度快、材料的回收和再利用率高等优点。因此,该结构体系具有广阔的发展前景和应用价值。在漫长的使用寿命里,工程结构可能遭受各种偶然的突发事件,如爆炸、火灾、汽车撞击等。这些突发事件可能导致结构的主要受力构件发生破坏,进而引发连续倒塌。结构一旦发生连续倒塌将造成重大的生命和财产损失,并产生恶劣的社会影响。因此,近年来国内外学者围绕结构抗连续倒塌性能开展了大量的试验和理论研究。然而,国内外尚没有对装配式斜支撑节点钢框架结构的抗连续倒塌性能开展深入的研究。本文采用拆除构件法对装配式斜支撑节点钢框架结构的抗连续倒塌性能进行了研究,主要内容如下:(1)介绍了美国抗连续倒塌规范GSA2003和Do D2013有关拆除构件法的定义。对比讨论了拆除构件的位置、荷载组合、分析方法及连续倒塌破坏准则的规范要求。(2)运用SAP2000有限元软件,采用Pushdown方法分别对装配式斜支撑节点钢框架和无支撑框架在边柱和中柱失效的情况下进行竖向推覆分析。分析讨论了装配式钢框架的传力路径和受力性能。(3)采用瞬时加载法对装配式斜支撑节点钢框架进行动力非线性分析。分析了失效时间、柱失效位置、斜支撑、材料屈服强度、阻尼比、节点转动刚度等参数对于多层平面钢框架抗连续倒塌性能的影响。(4)参考美国抗连续倒塌规范GSA2003和Do D2013,分别采用线性静力、非线性静力和非线性动力方法对某装配式斜支撑节点钢框架进行抗连续倒塌评估。然后,对不同方法的评估结果进行了对比分析。
[Abstract]:The steel frame structure with prefabricated oblique bracing joint is a new type of structure system, which has the advantages of ecological environment protection, fast construction speed, high material recovery and reutilization ratio and so on. The structure system has a broad development prospect and application value. In the long service life, the engineering structure may be subjected to a variety of accidental emergencies, such as explosion, fire. These sudden events may lead to the destruction of the main structural members, and then cause continuous collapse. Once the structure collapses continuously, it will cause great loss of life and property. Therefore, in recent years, scholars at home and abroad have carried out a large number of tests and theoretical studies on the continuous collapse resistance of structures. There has not been a deep research on the continuous collapse resistance of the steel frame structure with assembled inclined braced joints at home and abroad. In this paper, the continuous collapse resistance of the steel frame structure with assembled inclined braced joints is studied by using the method of removing the components. Research. The main contents are as follows: 1) this paper introduces the definitions of GSA2003 and do D2013 about the method of demolishing member, and discusses the location and load combination of the dismantled member. SAP2000 finite element software is used to analyze the method and the criterion of continuous collapse failure. Pushdown method is used to analyze the vertical push-over of the steel frame with and without bracing in the case of failure of the side column and the middle column respectively. The load transfer path of the assembled steel frame is analyzed and discussed. Mechanical properties. 3) the dynamic nonlinear analysis of the assembled steel frame with oblique braced joints is carried out by instantaneous loading method, and the failure time is analyzed. Column failure position, oblique bracing, material yield strength, damping ratio. The effect of the rotational stiffness of joints on the continuous collapse resistance of multi-storey steel frames. (4) the linear static force is adopted according to GSA2003 and do D2013 of the United States Code for continuous collapse. Nonlinear static and nonlinear dynamic methods are used to evaluate the continuous collapse resistance of an assembled steel frame with inclined braced joints, and the results of different methods are compared and analyzed.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU391;TU312.3

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