本文選題：樓板面內變形 + 框-剪結構��； 參考：《華中科技大學》2013年碩士論文

【摘要】：在一般的結構分析與設計中，設計者通常把樓板當作自身平面內剛度無限大而不計其面外剛度的構件來參與結構的計算，這樣可以減少方程中需要求解的未知數(shù)的量，從而大大簡化模型的計算。但是隨著結構平面形式的復雜化、多樣化，樓面大開洞或平面的不規(guī)則性使得樓板平面內產生變形，而不能滿足剛度無限大的假定，若仍采用剛性樓板假定，計算結果的真實性和可靠性就無法得到保證。因此，對于由框架和剪力墻兩種剛度差別較大的豎向構件組成的框-剪結構體系，更不能忽略樓板變形對于其受力特性的影響。 本文結合兩個框-剪結構工程實例，采用ETABS程序分別建立兩種模型：一種為剛性樓板假定模型，假定樓板面內無限剛；另一種為彈性樓板模型，考慮樓板面內變形。對每種模型進行振型分析和反應譜分析，，研究不同樓板假定對結構的動力特性、位移特性、內力變化的影響，得出樓板變形對框-剪結構受力特性的影響規(guī)律。 研究結果表明：相較于樓板剛性假定，彈性樓板假定下結構的整體剛度偏柔，結構周期增大，結構高階振型的質量參與系數(shù)占有不可忽略的比例；彈性樓板假定下結構的側移和層間位移角均比剛性假定下的大，同一樓層處框架柱的側移變化幅度要大于剪力墻的側移變化幅度；彈性樓板假定下樓面開洞或凹槽處的框架柱剪力可達到剛性假定時的數(shù)倍，應力集中現(xiàn)象也比較嚴重，可見樓板變形對結構受力特性的影響較為明顯。
[Abstract]:In general structural analysis and design, the designer usually takes the floor as a member with infinite stiffness in its own plane, regardless of its out-of-plane stiffness, to participate in the calculation of the structure, which can reduce the amount of unknown number that needs to be solved in the equation. Thus the calculation of the model is greatly simplified. However, with the complexity and diversification of the plane form of the structure, the large opening of the floor surface or the irregularity of the plane make the floor plane deform, and can not satisfy the assumption of infinite stiffness, if the rigid floor assumption is still adopted, The authenticity and reliability of the results cannot be guaranteed. Therefore, for the frame-shear structure system which consists of two kinds of vertical members with great stiffness difference, the influence of floor deformation on its mechanical characteristics can not be ignored. Based on two examples of frame-shear structure engineering, two models are established by using ETABS program: one is assumed rigid floor model, the other is elastic slab model, which takes into account the deformation of floor surface. The effects of different floor assumptions on the dynamic characteristics, displacement characteristics and internal forces of the structure are studied by means of modal analysis and response spectrum analysis for each model, and the influence of floor deformation on the mechanical properties of frame-shear structures is obtained. The results show that compared with the assumption of floor rigidity, the overall stiffness of the structure is flexible, the period of the structure increases, and the mass participation coefficient of the high-order modes of the structure occupies a proportion that can not be ignored. The lateral displacement and the interstory displacement angle of the structure under the elastic floor assumption are larger than those under the rigid assumption, and the range of the lateral displacement of the frame column at the same floor is larger than that of the shear wall. Under the elastic floor assumption, the shear force of the frame column at the opening or grooving of the floor can be several times as high as that of the rigid assumption, and the stress concentration phenomenon is more serious, so the influence of the floor deformation on the stress characteristics of the structure is obvious.
【學位授予單位】：華中科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU398.2

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