本文選題：碳纖維索穹頂 + 模態(tài)分析��； 參考：《東南大學(xué)》2015年碩士論文

【摘要】：碳纖維增強(qiáng)復(fù)合材料(CFRP)具有輕質(zhì)高強(qiáng)、耐久性好、耐疲勞性能優(yōu)良和可設(shè)計(jì)性能良好的特點(diǎn),還具有絕緣、隔熱及透電磁波等特性,符合國(guó)家“十二五規(guī)劃”所提倡的“綠色節(jié)能環(huán)�！钡慕ㄖ牧弦蟆Ｋ黢讽斀Y(jié)構(gòu)是一種受力合理、結(jié)構(gòu)效率高的張拉整體結(jié)構(gòu)體系,若將CFRP材料與索穹頂結(jié)構(gòu)相結(jié)合,形成碳纖維索穹頂結(jié)構(gòu),會(huì)大大優(yōu)化結(jié)構(gòu)的力學(xué)性能,同時(shí)可以跨越更大的跨度。本文在跨徑為120m的Geiger-鋼索穹頂?shù)幕A(chǔ)上,結(jié)合CFRP材料的特性,設(shè)計(jì)了與之剛度相近的Geiger型CFRP索穹頂,然后以與Geiger-CFRP索穹頂重量相等為目標(biāo)設(shè)計(jì)了Levy型CFRP索穹頂。后面系統(tǒng)研究了CFRP索穹頂?shù)膭?dòng)力特性以及抗震性能,同時(shí)也進(jìn)行了與傳統(tǒng)的鋼索穹頂?shù)膶?duì)比研究,具體內(nèi)容為：運(yùn)用結(jié)構(gòu)動(dòng)力分析的基本理論和分塊蘭索斯法對(duì)Geiger-鋼索穹頂、Geiger-CFRP索穹頂和Levy-CFRP索穹頂進(jìn)行了模態(tài)分析,分別比較Geiger-CFRP索穹頂與Geiger-鋼索穹頂,Levy-CFRP索穹頂與Geiger-CFRP索穹頂?shù)念l率與振型的異同,并討論了初始預(yù)張力水平和桿件截面面積對(duì)上述三個(gè)結(jié)構(gòu)的影響程度。在模態(tài)分析的基礎(chǔ)上,計(jì)入結(jié)構(gòu)的幾何剛度,對(duì)上述三個(gè)索穹頂結(jié)構(gòu)進(jìn)行了反應(yīng)譜分析,研究在單向和多向地震作用下,Geiger-CFRP索穹頂和Geiger-鋼索穹頂以及Levy-CFRP索穹頂和Geiger-CFRP索穹頂動(dòng)位移和動(dòng)內(nèi)力響應(yīng)的異同。同時(shí)考慮結(jié)構(gòu)的預(yù)應(yīng)力效應(yīng)、幾何非線性和材料特性,對(duì)Geiger-鋼索穹頂、Geiger-CFRP索穹頂和Levy-CFRP索穹頂進(jìn)行了多遇地震作用下的時(shí)程分析。首先根據(jù)抗震規(guī)范要求選取三條地震波并進(jìn)行相應(yīng)的調(diào)整；然后分析比較了結(jié)構(gòu)在單向和多向一致輸入下的動(dòng)力響應(yīng),并與反應(yīng)譜的結(jié)果進(jìn)行了比較；最后分析比較了結(jié)構(gòu)在單向和多向多點(diǎn)輸入下的動(dòng)力響應(yīng),并與一致輸入的結(jié)果作了比較。最后總結(jié)本文主要研究?jī)?nèi)容及成果,同時(shí)指出今后有待解決的若干關(guān)鍵問(wèn)題及研究方向。
[Abstract]:Carbon fiber reinforced composite (CFRP) has the characteristics of light and high strength, good durability, good fatigue resistance and good design performance, as well as the characteristics of insulation, heat insulation and electromagnetic wave transmission, etc. In line with the national "12-year Plan" advocated by the "Green Energy Conservation and Environmental Protection" building materials requirements. Cable dome structure is a kind of tensioning integral structure system with reasonable force and high structural efficiency. If CFRP material is combined with cable dome structure to form carbon fiber cable dome structure, the mechanical properties of the structure will be greatly optimized. At the same time can span a larger span. On the basis of the steel cable dome with a span of 120m, combined with the characteristics of CFRP material, the Geiger cable dome with similar stiffness is designed, and then the Levy CFRP cable dome is designed with the weight equal to that of the Geiger-CFRP cable dome. The dynamic characteristics and seismic performance of the CFRP cable dome are systematically studied, and the comparison with the traditional cable dome is also carried out. The main contents are as follows: using the basic theory of structural dynamic analysis and the lumped Ranssos method, the modal analysis of the Geiger-steel cable dome and the Levy-CFRP cable dome are carried out. The frequency and mode of the Geiger-CFRP cable dome are compared with that of the Geiger-CFRP cable dome, and the influence of the initial pretension level and the member cross section area on the above three structures are discussed. On the basis of modal analysis and taking into account the geometric stiffness of the structure, the response spectrum of the above three cable dome structures is analyzed. The differences and similarities of the dynamic displacement and dynamic internal force responses of the Geiger-CFRP cable dome and the Geiger-steel cable dome, as well as the Levy-CFRP cable dome and the Geiger-CFRP cable dome under unidirectional and multidirectional earthquakes are studied. At the same time, considering the prestress effect, geometric nonlinearity and material characteristics of the structure, the time history analysis of Geiger-CFRP cable dome and Levy-CFRP cable dome is carried out. First, three seismic waves are selected according to the requirements of seismic code and adjusted accordingly, then the dynamic response of the structure under unidirectional and multi-directional uniform input is analyzed and compared with the results of response spectrum. Finally, the dynamic response of the structure under unidirectional and multi-point input is analyzed and compared with the result of uniform input. Finally, this paper summarizes the main research contents and results, and points out some key problems and research directions to be solved in the future.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU399;TU352.11

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