本文選題：六桿四面體單元 + 球面網(wǎng)殼　； 參考：《浙江大學(xué)》2015年博士論文

【摘要】：隨著我國(guó)經(jīng)濟(jì)社會(huì)的快速發(fā)展,傳統(tǒng)建筑業(yè)粗放的生產(chǎn)、建造方式與資源、環(huán)境之間的矛盾日趨激化。在這一背景下,促進(jìn)建筑產(chǎn)業(yè)由粗放型向集約型發(fā)展、推動(dòng)建筑工業(yè)化進(jìn)程,成為我國(guó)建筑業(yè)發(fā)展的必然方向。國(guó)內(nèi)外經(jīng)驗(yàn)表明,建筑工業(yè)化的首要任務(wù)是開發(fā)具有工業(yè)化屬性的建筑結(jié)構(gòu)體系,否則一切工作都只能是空中樓閣。本文的研究對(duì)象是一種新型球面網(wǎng)殼結(jié)構(gòu),它由一系列平面投影為四邊形的六桿四面體模數(shù)單元組成,構(gòu)形簡(jiǎn)單且規(guī)律性強(qiáng),非常適合標(biāo)準(zhǔn)化設(shè)計(jì)、工業(yè)化生產(chǎn)和裝配化施工,是一種典型的面向建筑工業(yè)化時(shí)代的空間結(jié)構(gòu)體系。文中從理論和實(shí)踐角度對(duì)這種球面網(wǎng)殼結(jié)構(gòu)展開了研究,希望能藉此為我國(guó)的建筑工業(yè)化進(jìn)程提供一套成熟、可行的空間網(wǎng)格結(jié)構(gòu)新體系。 第1章對(duì)網(wǎng)殼結(jié)構(gòu)體系及計(jì)算分析方法的發(fā)展現(xiàn)狀進(jìn)行了總結(jié),介紹了國(guó)內(nèi)外在裝配式空間網(wǎng)格結(jié)構(gòu)方面的實(shí)踐情況。從我國(guó)建筑產(chǎn)業(yè)發(fā)展現(xiàn)狀出發(fā),闡明了當(dāng)前研發(fā)新型裝配式建筑結(jié)構(gòu)體系的意義,并明確了本文的研究?jī)?nèi)容。 第2章從組成球面網(wǎng)殼的六桿四面體基本模數(shù)單元的特點(diǎn)出發(fā),探討了它與傳統(tǒng)三角錐單元的異同。針對(duì)基本單元上弦桿沿球面經(jīng)線方向布置的球面網(wǎng)殼,提煉出了決定結(jié)構(gòu)形態(tài)的關(guān)鍵幾何參數(shù)。根據(jù)是否在網(wǎng)殼頂部開口處設(shè)置封口內(nèi)環(huán)桿,定義了球面網(wǎng)殼的有內(nèi)環(huán)桿和無內(nèi)環(huán)桿基本結(jié)構(gòu)體系。通過發(fā)掘基本單元不同的排布方式,還對(duì)六桿四面體單元可能組成的其他網(wǎng)殼結(jié)構(gòu)做了探討。 第3章分別基于Maxwell準(zhǔn)則和平衡矩陣?yán)碚搶?duì)六桿四面體單元組成的球面網(wǎng)殼的全鉸接基本結(jié)構(gòu)體系進(jìn)行了機(jī)動(dòng)分析,通過對(duì)體系平衡矩陣進(jìn)行一系列初等變換,結(jié)合平衡矩陣的物理意義,對(duì)分析結(jié)果進(jìn)行了嚴(yán)格證明。同時(shí)還從理論角度給出了網(wǎng)殼加強(qiáng)結(jié)構(gòu)體系和不同節(jié)點(diǎn)剛性布置方案的形成方式及依據(jù)。 第4章為球面網(wǎng)殼靜力性能的分析研究。靜力分析的主要內(nèi)容是對(duì)網(wǎng)殼結(jié)構(gòu)的強(qiáng)度和剛度進(jìn)行驗(yàn)算,以此來反映結(jié)構(gòu)在承受一定外荷載時(shí)所表現(xiàn)出的內(nèi)力和位移分布特點(diǎn)。研究中考慮了球面網(wǎng)殼的基本結(jié)構(gòu)體系和兩個(gè)加強(qiáng)結(jié)構(gòu)體系,以及每種結(jié)構(gòu)體系下四種節(jié)點(diǎn)剛性布置方案,從橫向和縱向兩個(gè)層面展開對(duì)比分析。文中還以球面網(wǎng)殼的關(guān)鍵幾何參數(shù)為變量進(jìn)行了參數(shù)分析。 第5章對(duì)球面網(wǎng)殼的穩(wěn)定性能進(jìn)行了系統(tǒng)的分析考察。首先提出了一種能考慮桿件失穩(wěn)影響的穩(wěn)定分析思路,并解決了在整體結(jié)構(gòu)分析中體現(xiàn)桿元穩(wěn)定性的問題。隨后利用該方法建立了球面網(wǎng)殼的有限元模型,并進(jìn)行了特征值屈曲分析以及考慮桿件失穩(wěn)和初始缺陷的幾何、材料雙重非線性分析。最后針對(duì)網(wǎng)殼的穩(wěn)定性能進(jìn)行了參數(shù)分析。 第6章從工程應(yīng)用的角度出發(fā),針對(duì)球面網(wǎng)殼一個(gè)比較適合工程應(yīng)用的節(jié)點(diǎn)剛性布置方案給出了具體的節(jié)點(diǎn)構(gòu)造形式�；谒岢龅墓�(jié)點(diǎn)構(gòu)造和球面網(wǎng)殼的構(gòu)形特點(diǎn),提出一種高空懸臂無腳手的裝配化施工方案,并設(shè)計(jì)了施工中所需的輔助構(gòu)件。最后還研究了針對(duì)所提出施工方案的全過程內(nèi)力分析方法,并將這種方法得到的結(jié)果與常規(guī)滿堂紅腳手架施工方案在落架時(shí)的結(jié)構(gòu)內(nèi)力分布進(jìn)行了對(duì)比。 第7章在前面各章所做的理論工作基礎(chǔ)上,對(duì)六桿四面體單元組成的球面網(wǎng)殼進(jìn)行了模型試驗(yàn)研究。首先基于一個(gè)10米跨度的大型實(shí)物模型,對(duì)球面網(wǎng)殼的工業(yè)化生產(chǎn)和裝配化施工進(jìn)行了實(shí)踐,分析、總結(jié)了實(shí)踐中存在的問題。然后對(duì)模型的安裝精度進(jìn)行了測(cè)量,利用測(cè)得的節(jié)點(diǎn)坐標(biāo)重建了有限元模型,從理論上考察了安裝誤差對(duì)結(jié)構(gòu)靜力特性的影響。最后對(duì)模型進(jìn)行了靜力加載測(cè)試,將測(cè)試結(jié)果與實(shí)際模型的有限元計(jì)算結(jié)果進(jìn)行了對(duì)比,分析了誤差來源及其對(duì)結(jié)構(gòu)靜力性能的影響機(jī)理。 第8章對(duì)本文研究所得結(jié)論進(jìn)行了總結(jié),并指出了下一步的研究方向。
[Abstract]:With the rapid development of our country's economy and society, the contradiction between the extensive production of traditional construction industry, the construction mode and the resources and the environment is becoming more and more intense. In this context, it is an inevitable direction for the construction industry to promote the construction industry from extensive to intensive development and to promote the process of construction industrialization. The primary task of the industrialization is to develop a building structure system with industrial properties. Otherwise, all work can only be a castle in the air. The object of this paper is a new type of spherical reticulated shell. It is composed of a series of six bar tetrahedral modulus units which are projected into quadrangles by a series of planes, which are simple and regular. It is very suitable for standardization. Industrial production and assembly construction are a typical spatial structure system facing the era of architectural industrialization. This paper studies the spherical reticulated shell structure from the theoretical and practical perspectives, hoping to provide a mature and feasible new system of space grid structure for the process of building industrialization in China.
In the first chapter, the development status of the structure system and the method of calculation and analysis of the reticulated shell is summarized, and the practical situation of the assembly space grid structure at home and abroad is introduced. From the current situation of the development of the building industry in China, the meaning of the current research and development of the new type of assembly architecture system is clarified, and the content of this paper is clearly defined.
In the second chapter, based on the characteristics of the basic modulus unit of the six bar tetrahedron, which consists of a spherical reticulated shell, the similarities and differences with the traditional triangular cone unit are discussed. The key geometric parameters determining the structure form are extracted for the spherical reticulated shell arranged along the direction of the spherical meridian along the sphere of the basic unit. The inner ring bar and the basic structure system of a spherical reticulated shell with inner ring and no inner ring are defined. The structure of other reticulated shells which may be composed of six bar tetrahedron elements is also discussed by exploring the different layout methods of the basic units.
In the third chapter, based on the Maxwell criterion and the equilibrium matrix theory, the full hinged basic structure system of the spherical reticulated shell composed of six rod tetrahedral elements is analyzed. A series of elementary transformations are carried out on the system equilibrium matrix and the physical meaning of the equilibrium matrix is combined to prove the results of the analysis strictly. The form and basis of the reticulated shell reinforcement system and the rigid layout scheme of different joints are given.
The fourth chapter is the analysis and study of static performance of spherical reticulated shell. The main content of static analysis is to check the strength and stiffness of the reticulated shell structure to reflect the characteristics of the internal force and displacement distribution when the structure is subjected to a certain external load. In the study, the basic structure system and two strengthening structural systems of the spherical reticulated shell are considered in the study. And the four rigid layout schemes for each structure system are analyzed from two aspects of transverse and longitudinal. The parameters of the key geometric parameters of the spherical reticulated shell are analyzed in this paper.
In the fifth chapter, the stability of the spherical reticulated shell is systematically analyzed. First, a stable analysis method which can consider the effect of the instability of the rod is proposed, and the problem of the stability of the rod element is solved in the analysis of the whole structure. Then the finite element model of the spherical reticulated shell is established by the method, and the eigenvalue buckling analysis is carried out. And the geometric and material dual nonlinear analysis considering the instability and initial defects of the rod. Finally, the stability analysis of the reticulated shell is carried out.
From the point of view of engineering application, the sixth chapter gives a concrete form of node structure for a spherical reticulated shell which is suitable for engineering application. Based on the proposed node structure and the configuration characteristics of the spherical reticulated shell, a installation and matching construction scheme for the high altitude cantilever hand free hand is proposed, and the necessary construction is designed. In the end, the whole process internal force analysis method for the proposed construction scheme is also studied, and the results obtained by this method are compared with the structural internal force distribution of the conventional full red scaffold construction scheme in the falling frame.
The seventh chapter, based on the theoretical work done in the preceding chapters, carries out a model test study on the spherical reticulated shell composed of six tetrahedron units. First, based on a large physical model of a 10 meter span, the industrial production and assembly construction of the spherical reticulated shell are practiced and analyzed, and the problems in the practice are summarized. The installation accuracy of the type is measured. The finite element model is rebuilt by the measured node coordinates. The influence of the installation error on the static characteristics of the structure is investigated theoretically. Finally, the static loading test is carried out on the model. The result of the test is compared with the finite element calculation results of the actual model, and the source of the error and its structure are analyzed. The influence mechanism of static performance.
The eighth chapter summarizes the conclusions and points out the next research direction.

【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU399

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本文編號(hào)：1779349