本文關(guān)鍵詞：800m 超大跨度穹頂結(jié)構(gòu)選型研究　出處：《哈爾濱工業(yè)大學》2014年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 超大跨度穹頂結(jié)構(gòu) 結(jié)構(gòu)選型 彈塑性穩(wěn)定 向量式有限元

【摘要】：建筑功能日益多樣化,要求建筑物能夠提供更大的使用空間�？v觀空間結(jié)構(gòu)發(fā)展歷史,如何提高建筑結(jié)構(gòu)跨越能力一直是結(jié)構(gòu)工程師的不懈追求。自古羅馬時期萬神廟到1957年的小羅馬體育宮,在如此漫長的歷史進程中,受制于建筑材料發(fā)展水平,結(jié)構(gòu)跨越能力幾乎沒有提高;近三十年來,隨著新材料、新工藝、新技術(shù)、新結(jié)構(gòu)形式不斷涌現(xiàn),空間結(jié)構(gòu)發(fā)展實現(xiàn)巨大飛躍,結(jié)構(gòu)跨度已達300m量級�？臻g結(jié)構(gòu)發(fā)展為更大跨度穹頂結(jié)構(gòu)探索提供了一定的技術(shù)支撐。與此同時,隨著人類社會的發(fā)展進步,超大跨度穹頂結(jié)構(gòu)建造需求日益顯現(xiàn):在極地、沙漠以及外星球等自然條件極為惡劣地區(qū),營造適合人類生存的區(qū)域小環(huán)境;保護城市居民免受環(huán)境惡化、自然災(zāi)害的影響;城市發(fā)展過程中節(jié)能減排的要求等。早在二十世紀六十年代,歐美發(fā)達國家的建筑結(jié)構(gòu)大師開始對千米級超大跨度穹頂結(jié)構(gòu)展開研究,并提出若干概念性設(shè)計方案。超大跨度穹頂結(jié)構(gòu)研究是一項多學科的系統(tǒng)工程,對于如此巨大、且需承受復(fù)雜荷載的結(jié)構(gòu),采用什么樣的結(jié)構(gòu)體系是其首先需要解決的問題。圍繞800m超大跨度穹頂結(jié)構(gòu)方案選型問題,本文主要開展了以下研究工作:(1)建立統(tǒng)一的結(jié)構(gòu)方案評價標準以現(xiàn)行工程設(shè)計規(guī)范為基礎(chǔ),并結(jié)合當前科技發(fā)展水平,建立了包括結(jié)構(gòu)方案設(shè)計與結(jié)構(gòu)性能分析的統(tǒng)一技術(shù)標準。首先,為選擇合理建筑材料,探索了輕質(zhì)高強材料在超大跨度穹頂結(jié)構(gòu)方案設(shè)計中的適用性;其次,為提高方案選型效率,編寫了桁架式構(gòu)件與梁式構(gòu)件截面設(shè)計程序,并驗證了其正確性;最后,為解決傳統(tǒng)有限元方法進行結(jié)構(gòu)全過程分析存在的計算不收斂、“回漂”等問題,引入了向量式有限元方法,并對方法的相關(guān)參數(shù)取值進行了研究。(2)剛性結(jié)構(gòu)方案探索剛性結(jié)構(gòu)是工程應(yīng)用中最為常用的結(jié)構(gòu)形式,而雙層網(wǎng)殼結(jié)構(gòu)是其優(yōu)秀代表。針對雙層網(wǎng)殼結(jié)構(gòu),從凱威特型交叉桁架球面網(wǎng)殼結(jié)構(gòu)出發(fā),依次調(diào)整上下弦構(gòu)件拓撲關(guān)系、結(jié)構(gòu)曲面形狀以及網(wǎng)格劃分方法,對比所得不同結(jié)構(gòu)方案綜合性能,獲得相對較優(yōu)雙層網(wǎng)殼結(jié)構(gòu)方案。以此為基礎(chǔ),開展結(jié)構(gòu)跨度、矢跨比、支承方式、結(jié)構(gòu)厚度以及網(wǎng)格尺寸等參數(shù)分析,了解不同參數(shù)對結(jié)構(gòu)性能的影響,最終給出相對較優(yōu)的參數(shù)取值建議。(3)剛?cè)峤M合結(jié)構(gòu)方案探索剛?cè)峤M合結(jié)構(gòu)是將剛性結(jié)構(gòu)與柔性結(jié)構(gòu)進行合理組合,目的是獲得更佳的結(jié)構(gòu)性能與建筑效果。針對剛?cè)峤M合結(jié)構(gòu)方案,基于改善結(jié)構(gòu)方案通透性考慮,結(jié)合不同結(jié)構(gòu)形式受力特點,選取索承網(wǎng)殼結(jié)構(gòu)與索桿加強網(wǎng)格結(jié)構(gòu),探索其在超大跨度穹頂結(jié)構(gòu)中的適用性。將索承網(wǎng)殼結(jié)構(gòu)與雙層網(wǎng)殼組合,獲得上下組合結(jié)構(gòu)方案(中心索承網(wǎng)殼結(jié)構(gòu)外圈雙層網(wǎng)殼結(jié)構(gòu)),通過反復(fù)滿應(yīng)力設(shè)計與找形分析完成方案設(shè)計,獲得結(jié)構(gòu)性能;對于索桿加強網(wǎng)格結(jié)構(gòu),研究了索撐短程線型網(wǎng)格結(jié)構(gòu)、索撐四邊形網(wǎng)格結(jié)構(gòu)以及索撐巨型桁架結(jié)構(gòu)的結(jié)構(gòu)性能。
[Abstract]:The building function is diversified, requirements of the buildings can provide greater use of space. Throughout the history of development of space structure, how to improve the building structure spanning ability has been relentless pursuit of structural engineers from the ancient Rome period. The Pantheon to 1957 Rome small sports palace, in such a long history, subject to the building materials development level. The structure span almost no increase; the past thirty years, along with the development of new materials, new technology, new technology, new structure forms are emerging, realize the great leap forward development of space structure, the span has reached 300m level. The space structure to provide certain technical support to explore more long-span dome structure. At the same time, along with the development and progress human society, large span dome construction demand increasingly appear in the polar desert, and other planets and other natural conditions are extremely harsh areas, to create a suitable Small areas of the living environment of human being; to protect city residents from the deterioration of the environment, the impact of natural disasters; energy-saving emission reduction requirements in the process of city development. In early 1960s, construction master of developed countries in Europe and America began to 1000m super long span structure of the dome, and puts forward some conceptual design scheme of super dome. The span is a multidisciplinary system engineering, and the need for such a huge structure, under complex loads, the structure of what is the first problem to be solved. The selection of 800m ultra long span dome structure scheme, this paper carried out the following research work: (1) establish a unified evaluation scheme the standard to regulate the current design engineering as the foundation, combined with the current level of development of science and technology, including the establishment of a unified design and structural analysis of performance structure scheme Technical standards. First of all, to choose suitable building materials, explore the applicability of lightweight materials in the design of large span dome structure scheme; secondly, in order to improve the efficiency of selection scheme, preparation of truss members and beam section design program, and verifies its correctness; finally, in order to solve the traditional finite element methods to analyze the whole process of structure calculation does not converge, "bleach", introduced the method of vector finite element method, and the related parameters were studied. (2) the rigid structure exploration for rigid structure in engineering application is the most commonly used form of the structure, and the double-layer reticulated shell structure excellent representative. According to double shell structure, starting from the intersection truss Kiewitt reticulated shell structure in order to adjust the upper and lower chord member topological relation, structure surface shape and mesh method, comparing the different node The comprehensive performance, obtained relatively better double-layer reticulated shell structure. On this basis, to carry out the structure span, span ratio, support, analysis of structure thickness and mesh size, to understand the effects of different parameters on the structural performance parameters, finally gives suggestions relatively better. (3) a combination of rigid and flexible structure scheme exploration of rigid flexible composite structure is rigid structure and flexible structure reasonable combination, the purpose is to obtain a better structure performance and construction effect. According to the structure scheme of rigid flexible, improve the structure of program based on the combination of different permeability, structure stress characteristic, selection of cable supported lattice shell structure and rod cable strengthen the grid structure, and explore its applicability in large span dome structure. The cable supported lattice shell structure with double-layer reticulated shell combination, obtained under the combined configuration (center of the cable outer bearing ring double layer reticulated shell shell structure), Through repeated full stress design and form finding analysis, the structural design is completed, and the structural performance is obtained. For cable strut reinforced grid structure, the cable short line grid structure, cable braced quadrilateral grid structure and cable truss Mega truss structure are studied.

【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU399

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相關(guān)期刊論文 前1條

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本文編號：1384783