【摘要】： 弦支網(wǎng)殼是由Fuller的“張拉整體”思想發(fā)展而來的,一種典型的由索、桿、梁單元組成的空間結(jié)構(gòu)體系。該體系可充分發(fā)揮預(yù)應(yīng)力技術(shù)的優(yōu)勢來提高單層網(wǎng)殼的剛度和承載能力。近年來弦支網(wǎng)殼已有較多的研究和工程應(yīng)用,如用于體育建筑、會展建筑等,但其建筑平面多為與穹頂球面(橢球面)網(wǎng)殼相應(yīng)的圓形平面(橢圓形平面),比較單一,影響了推廣應(yīng)用范圍。本文提出一種由上部單層柱面網(wǎng)殼和下部弦支體系組合而成的弦支柱面網(wǎng)殼,對這種新型空間結(jié)構(gòu)進行了系統(tǒng)的研究。 第1章總結(jié)了大跨度空間結(jié)構(gòu)的分類,系統(tǒng)地分析了弦支網(wǎng)殼結(jié)構(gòu)的發(fā)展歷史、工程應(yīng)用和研究現(xiàn)狀,并確定了本文的研究內(nèi)容。 第2章對弦支柱面網(wǎng)殼的形式進行了分類,提出了四種類型的單體弦支柱面網(wǎng)殼,并根據(jù)支承條件提出了四種組合方式,這些形式可以應(yīng)用于不同建筑造型的大跨度空間結(jié)構(gòu)。 第3章總結(jié)了弦支網(wǎng)殼的形態(tài)分析問題,包括形態(tài)分析問題的分類、求解思路和下部索桿的預(yù)應(yīng)力設(shè)計。 第4章以三環(huán)弦支單向斜桿正交正放網(wǎng)格型柱面網(wǎng)殼結(jié)構(gòu)為例,分析了該結(jié)構(gòu)在均布荷載作用下的靜動力性能,研究了結(jié)構(gòu)在預(yù)應(yīng)力水平、網(wǎng)殼桿件截面、矢跨比和平面尺寸等參數(shù)下的力學(xué)性能。 第5章分析了三環(huán)弦支的兩種類型的柱面網(wǎng)殼的特征值屈曲,研究了結(jié)構(gòu)在預(yù)應(yīng)力水平、網(wǎng)殼桿件截面、矢跨比和平面尺寸等參數(shù)下的特征值屈曲特性。以三環(huán)弦支單向斜桿正交正放網(wǎng)格型柱面網(wǎng)殼結(jié)構(gòu)為例,分析了均布荷載作用下,該結(jié)構(gòu)在,預(yù)應(yīng)力水平、網(wǎng)殼桿件截面、矢跨比、平面尺寸和初始缺陷等參數(shù)下的非線性屈曲性能。研究了不同弦支環(huán)數(shù)對弦支柱面網(wǎng)殼穩(wěn)定性能的影響,并比較了兩種大跨度空間結(jié)構(gòu)的經(jīng)濟性能。 第6章以深圳北站無柱站臺雨棚為背景,設(shè)計了3×3網(wǎng)格的1/8縮尺模型,對其進行了下部索桿預(yù)應(yīng)力張拉試驗、靜力加載試驗和局部斷索(桿)試驗,并對試驗實測數(shù)據(jù)與理論分析結(jié)果進行了比較和分析。 第7章對本文研究的內(nèi)容進行了總結(jié),指出了該種新型結(jié)構(gòu)仍需要解決的一些問題,明確了今后的研究方向。
[Abstract]:The chord-branch latticed shell is developed from Fuller's idea of "tensioning as a whole", which is a typical spatial structure system composed of cable, bar and beam elements. The system can give full play to the advantages of prestressed technology to improve the stiffness and bearing capacity of single-layer latticed shells. In recent years, chord branch latticed shells have been studied and applied in engineering, such as sports buildings, exhibition buildings, etc., but most of their building planes are circular planes (ellipsoidal planes) corresponding to dome spherical (ellipsoidal) reticulated shells, which are relatively simple. The range of popularization and application is affected. In this paper, a kind of chord support reticulated shell composed of the upper monolayer cylindrical reticulated shell and the lower chord branch system is proposed, and the new space structure is systematically studied. Chapter 1 summarizes the classification of long-span spatial structures, systematically analyzes the history of development, engineering application and research status of chord supported latticed shell structures, and determines the research contents of this paper. In chapter 2, the form of chord strut latticed shell is classified, and four types of single chord strut reticulated shell are proposed. According to the supporting conditions, four kinds of combination methods are proposed. These forms can be applied to large span spatial structures with different architectural shapes. In chapter 3, the shape analysis problems of chord latticed shell are summarized, including the classification of the shape analysis problem, the solution idea and the design of the prestressing force of the lower cable-bar. In chapter 4, the static and dynamic behavior of the three-ring chord-supported unidirectional oblique bar orthogonal orthotropic cylindrical reticulated shell structure under uniform load is analyzed, and the prestressing level of the structure and the section of the latticed shell member are studied. The mechanical properties under the parameters such as rise-span ratio and plane size. In chapter 5, the eigenvalue buckling of two types of cylindrical latticed shells with three-ring chord support is analyzed, and the eigenvalue buckling characteristics of the structure under the prestress level, the member section of the latticed shell, the rise-span ratio and the plane size are studied. Taking the three-ring chord-supported unidirectional oblique bar orthotropic cylindrical reticulated shell structure as an example, the structure under uniform load is analyzed in terms of the prestressing level, the cross section of the latticed shell member and the rise-span ratio. The nonlinear buckling performance under the parameters of plane size and initial defect. The influence of the number of chord rings on the stability of reticulated shell with chord support is studied, and the economic performance of two kinds of long-span space structures is compared. In chapter 6, the 1 / 8 scale model of 3 脳 3 mesh is designed based on the rain shed without column of Shenzhen North Railway Station, and the prestressing tension test, static loading test and local broken cable (bar) test are carried out on the model. The experimental data are compared with the theoretical analysis results. Chapter 7 summarizes the contents of this paper, points out some problems that still need to be solved, and clarifies the research direction in the future.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2010
【分類號】：TU399

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