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  本文選題：冷彎薄壁型鋼 + 背靠式組合截面構(gòu)件��； 參考：《北京交通大學(xué)》2013年碩士論文

【摘要】：隨著我國鋼材產(chǎn)量的不斷提高以及技術(shù)水平的不斷進(jìn)步,鋼結(jié)構(gòu)的應(yīng)用越來越廣泛,薄壁輕型鋼結(jié)構(gòu)是鋼結(jié)構(gòu)房屋發(fā)展的主要趨勢之一。冷彎薄壁型鋼構(gòu)件可以加工成多種經(jīng)濟(jì)截面形式,受力性能較好,承載力較高,整體剛度較大,而且易于加工、制作簡單,運(yùn)輸、安裝方便,易于工業(yè)化,大量應(yīng)用于輕鋼龍骨等住宅結(jié)構(gòu)中。在現(xiàn)有的理論分析和應(yīng)用現(xiàn)狀的基礎(chǔ)上,本文通過研究能夠運(yùn)用于冷彎薄壁型鋼框架結(jié)構(gòu)體系的新型組合截面梁構(gòu)件,可以充分利用其優(yōu)越的抗彎能力,以及組合增強(qiáng)效應(yīng),為框架結(jié)構(gòu)體系整體靜、動力分析研究做準(zhǔn)備。 首先,本文運(yùn)用ANSYS有限元軟件,基于穩(wěn)定理論,考慮幾何、材料雙重非線性以及初始幾何缺陷的影響,采用殼單元Shell181,通過背靠式的組合方式,耦合出栓釘連接,建立了冷彎薄壁型鋼組合構(gòu)件的有限元模型。將有限元模型試算結(jié)果與已有構(gòu)件試驗(yàn)進(jìn)行對比分析后,認(rèn)為有限元模型結(jié)果基本可信。 其次,本文對純彎作用下的冷彎薄壁型鋼背靠式組合構(gòu)件進(jìn)行了較為全面的參數(shù)分析。根據(jù)計算獲得的荷載-位移曲線、極限承載力、屈曲行為等,分析了初始缺陷、卷邊寬度、翼緣寬度、腹板高度、構(gòu)件長度以及構(gòu)件截面寬高比等參數(shù)對其靜力性能的影響規(guī)律,并給出了一些參數(shù)建議取值。 最后,通過單肢槽型構(gòu)件與組合背靠式構(gòu)件極限狀態(tài)的對比,分析了各個參數(shù)對組合效應(yīng)的影響規(guī)律。運(yùn)用MATLAB軟件對大量的分析所得的組合效應(yīng)數(shù)值進(jìn)行回歸,得到擬合公式,量化了組合效應(yīng)的大小,并將這個系數(shù)運(yùn)用于組合構(gòu)件的DSM法的修正。
[Abstract]:With the development of steel production and technology in China, the application of steel structure is more and more extensive. Thin-walled light steel structure is one of the main trends in the development of steel structure building. Cold-formed thin-walled steel members can be processed into a variety of economic cross-section forms, with better mechanical properties, higher bearing capacity, greater overall stiffness, and easy processing, easy fabrication, easy transportation, easy installation, and easy industrialization. A large number of applications in light steel keel and other residential structures. On the basis of the existing theoretical analysis and application status, this paper studies the new type of composite beam members which can be applied to cold-formed thin-walled steel frame structure system, which can make full use of its superior bending resistance and composite strengthening effect. Prepare for the whole static and dynamic analysis of frame structure system. Firstly, using ANSYS finite element software, based on the stability theory, considering the influence of geometry, material double nonlinearity and initial geometric defect, the shell element Shell181is used to couple the pin connection by the way of the combination of backrest type. The finite element model of cold-formed thin-walled steel composite member is established. It is considered that the finite element model results are basically credible after comparing the finite element model test results with the existing member tests. Secondly, the parameter analysis of cold-formed thin-walled steel backrest composite members under pure bending is carried out in this paper. According to the load-displacement curve, ultimate bearing capacity, buckling behavior and so on, the initial defects, crimping width, flange width and web height are analyzed. The influence of the parameters such as the length of the member and the ratio of the section width to the height of the member on its static performance is studied and some suggested values are given. Finally, the influence of each parameter on the combination effect is analyzed by comparing the limit state of the single-leg grooved member with the composite back member. By using MATLAB software, a large number of combined effect values are regressed, the fitting formula is obtained, the magnitude of the combination effect is quantified, and the coefficient is applied to the modification of the DSM method of the composite component.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU392.5

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本文編號：1956936