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  本文選題：雙層柱面網(wǎng)殼　切入點：支承條件　出處：《青島理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：雙層柱面網(wǎng)殼結(jié)構(gòu)是一種頗受國內(nèi)外關(guān)注且有廣闊發(fā)展前景的大跨度空間結(jié)構(gòu)，而且國內(nèi)學(xué)者在結(jié)構(gòu)靜、動力性能及抗震設(shè)計的研究領(lǐng)域取得了豐碩成果。但是，關(guān)于網(wǎng)殼結(jié)構(gòu)在不同支承條件下動力性能方面的研究還不完善，特別是獨立柱支承網(wǎng)殼結(jié)構(gòu)地震反應(yīng)方面的研究還不夠。在現(xiàn)實工程中，網(wǎng)殼結(jié)構(gòu)支承在鋼柱上時，地震作用通過支承結(jié)構(gòu)傳給上部網(wǎng)殼屋蓋，若不考慮下部支承結(jié)構(gòu)剛度的影響，將會與實際情況產(chǎn)生較大的偏差。因此，對考慮不同支承條件下網(wǎng)殼結(jié)構(gòu)在地震作用下的動力分析的研究有著重要意義。 本文以青島海上嘉年華門廳工程為背景，通過有限元分析軟件SAP2000研究了雙層正放四角錐形柱面網(wǎng)殼結(jié)構(gòu)在不同的支座類型及支承剛度條件下對結(jié)構(gòu)靜、動力性能及地震反應(yīng)的影響。 首先，分析了雙層柱面網(wǎng)殼結(jié)構(gòu)在不同的支座類型及不同支承剛度條件下的靜力性能，并在支座反力、桿件內(nèi)力、節(jié)點位移方面與獨立柱支承的網(wǎng)殼結(jié)構(gòu)整體模型進行對比。 其次，對四種支承條件下的網(wǎng)殼結(jié)構(gòu)進行了模態(tài)分析，得出了不同支承條件下結(jié)構(gòu)的自振頻率及其對應(yīng)振型，分析比較了網(wǎng)殼結(jié)構(gòu)在不同支承條件下自振特性方面的差異。總結(jié)了網(wǎng)殼結(jié)構(gòu)自振頻率隨支承剛度變化的規(guī)律，指出了利用彈性支座模型代替獨立柱支承模型分析的關(guān)鍵因素。研究了網(wǎng)殼結(jié)構(gòu)在不同支承條件下，矢跨比對結(jié)構(gòu)基頻的影響程度，得出對設(shè)計有參考價值的結(jié)論。 最后，，對獨立柱支承的網(wǎng)殼結(jié)構(gòu)在6、7、8度多遇地震作用下進行振型分解反應(yīng)譜分析，采用時程法對8度多遇地震進行補充分析，并比較了反應(yīng)譜法與時程分析法計算結(jié)果的異同，同時和網(wǎng)殼結(jié)構(gòu)的靜力結(jié)果進行對比總結(jié)。
[Abstract]:The double-layer cylindrical latticed shell structure is a kind of large-span space structure which has attracted much attention at home and abroad and has broad prospects for development. Moreover, domestic scholars have made great achievements in the field of structural static, dynamic performance and seismic design. The study on the dynamic performance of latticed shell structures under different supporting conditions is not perfect, especially the study on the seismic response of latticed shell structures supported by independent columns. In practical engineering, the latticed shell structures are supported on steel columns. The seismic action is transmitted to the upper latticed shell roof through the supporting structure. If the stiffness of the lower supporting structure is not considered, there will be a big deviation from the actual situation. It is of great significance to study the dynamic analysis of latticed shell structures under earthquake action under different supporting conditions. Based on the Qingdao Marine Carnival Lobby Project, this paper studies the static behavior of the double-layered four-corner conical cylindrical reticulated shell structure under the conditions of different bearing types and supporting stiffness by using the finite element analysis software SAP2000. The influence of dynamic performance and seismic response. Firstly, the static behavior of double-layer cylindrical latticed shell structure under different support types and different supporting stiffness is analyzed, and compared with the integral model of the reticulated shell structure supported by independent columns in the aspects of support reaction force, internal force of rod and node displacement. Secondly, the modal analysis of the latticed shell structure under four kinds of supporting conditions is carried out, and the natural vibration frequency and the corresponding vibration modes of the structure under different supporting conditions are obtained. The differences of natural vibration characteristics of latticed shell structures under different supporting conditions are analyzed and compared. The variation of natural vibration frequency with support stiffness of latticed shell structures is summarized. The paper points out the key factors of using elastic support model to replace the independent column support model, studies the influence of rise-span ratio on the fundamental frequency of latticed shell structure under different supporting conditions, and draws a conclusion of reference value for design. Finally, the vibration mode decomposition response spectrum analysis of the reticulated shell structure supported by independent columns is carried out under the action of frequent earthquakes of 6 ~ 7 ~ 8 degrees, and an additional analysis of frequent earthquakes of 8 degrees is carried out by using the time-log method. The similarities and differences between the response spectrum method and the time-history analysis method are compared and compared with the static results of the reticulated shell structure.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU399;TU311.3

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