【作者】 熊光红；

【导师】 戴俊；

【作者基本信息】 西安科技大学 ， 结构工程， 2004， 硕士

【摘要】 在某些特殊环境中，建筑结构会遭受简谐荷载的作用，产生较大变形，影响建筑物正常使用。本文在广泛查阅国内外关于钢筋混凝土框架结构动力研究成果的基础上，建立了实用的动力分析有限元模型，进行了钢筋混凝土框架结构在简谐荷载作用下的动力响应分析。本文主要内容包括：针对钢筋混凝土框架结构自振动力特性以及动力响应随结构形式变化的特点，设计了不同的平面杆系有限元模型；进行了自振频率及简谐荷载作用下强迫振动响应的数值模拟计算；对计算结果进行了全面、深入的分析，得到了钢筋混凝土框架结构自振频率随结构形式变化的规律和简谐荷载作用下结构变形及位移响应的一般规律。根据研究，得到如下结论：（1） 在结构设计过程中，通过掌握结构形式对自振频率的影响规律，调整结构形式，可使结构自振周期或频率有效避开建筑场地的卓越周期和结构使用期间发生概率较大的动荷载频率，有效地减少结构在使用期间与外荷载发生共振而造成的破坏；（2） 利用结构在某一频率简谐荷载作用下的变形及破坏形式的规律，在进行结构动力设计、演算及结构动力响应观测时可明确结构动力薄弱部位，能够实现对结构动力响应的有效控制。 根据与实例的对比分析，可以认为本文研究成果有助于建筑结构抗简谐荷载的动力设计，使建筑结构在安全上更加可靠，在经济上更加合理。本文工作具有较好的工程实际意义和应用价值。更多还原

【Abstract】 In some special places, the reinforced concrete frame is possibly subjected to the harmonic loads, which result in larger frame displacements, and perhaps make it unsafe. Based on extensive achievement on the RC frame dynamic response by the domestic and overseas experts, the finite element model is established, and the dynamic response numerical analysis is done in this paper. This paper had designed the different plane stick-system finite element model, and then calculated the free-vibration frequency and dynamic response of the frame to the harmonic loads. Through the analysis of calculation, the disciplinarian that the structure free-vibration frequency changes relating to the structure form and the common law about deformation and displacement of structure to the harmonic loads can be attained. According to the research, the conclusion is as follows. Firstly, by finding out the disciplinarian of R.C. frame free-vibration frequency relating to structure form, the structure form would be adjusted when the proceeding structure design and the free-vibration frequency or period would be made to avoid validly the outstanding period of local place and the frequency of loads which encountered frequently, and the serious destroy resulted from resonance would be reduced. Secondly, using the law about deformation and damage form of structure to the harmonic loads with some special frequency, the weakness can be determined in the proceeding of structure dynamic design and measurement. The dynamic response can be effectively controlled.By comparison between the result of instance and the theory conclusion, the finding contribute to the dynamic design of structure under the harmonic loads, and make the building more reliable in safe and more reasonable in economy. It is significant to engineering practice and worthy to be consulted.更多还原