本文選題：樓板面內(nèi)變形 + 框-剪結(jié)構(gòu)�。� 參考：《華中科技大學(xué)》2013年碩士論文

【摘要】：在一般的結(jié)構(gòu)分析與設(shè)計(jì)中，設(shè)計(jì)者通常把樓板當(dāng)作自身平面內(nèi)剛度無(wú)限大而不計(jì)其面外剛度的構(gòu)件來(lái)參與結(jié)構(gòu)的計(jì)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(jiǎn)化模型的計(jì)算。但是隨著結(jié)構(gòu)平面形式的復(fù)雜化、多樣化，樓面大開(kāi)洞或平面的不規(guī)則性使得樓板平面內(nèi)產(chǎn)生變形，而不能滿足剛度無(wú)限大的假定，若仍采用剛性樓板假定，計(jì)算結(jié)果的真實(shí)性和可靠性就無(wú)法得到保證。因此，對(duì)于由框架和剪力墻兩種剛度差別較大的豎向構(gòu)件組成的框-剪結(jié)構(gòu)體系，更不能忽略樓板變形對(duì)于其受力特性的影響。 本文結(jié)合兩個(gè)框-剪結(jié)構(gòu)工程實(shí)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(nèi)無(wú)限剛；另一種為彈性樓板模型，考慮樓板面內(nèi)變形。對(duì)每種模型進(jìn)行振型分析和反應(yīng)譜分析，，研究不同樓板假定對(duì)結(jié)構(gòu)的動(dòng)力特性、位移特性、內(nèi)力變化的影響，得出樓板變形對(duì)框-剪結(jié)構(gòu)受力特性的影響規(guī)律。 研究結(jié)果表明：相較于樓板剛性假定，彈性樓板假定下結(jié)構(gòu)的整體剛度偏柔，結(jié)構(gòu)周期增大，結(jié)構(gòu)高階振型的質(zhì)量參與系數(shù)占有不可忽略的比例；彈性樓板假定下結(jié)構(gòu)的側(cè)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(cè)移變化幅度要大于剪力墻的側(cè)移變化幅度；彈性樓板假定下樓面開(kāi)洞或凹槽處的框架柱剪力可達(dá)到剛性假定時(shí)的數(shù)倍，應(yīng)力集中現(xiàn)象也比較嚴(yán)重，可見(jiàn)樓板變形對(duì)結(jié)構(gòu)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(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU398.2

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