具有内外环桁架的新型张弦网壳结构理论分析与试验研究
发布时间：2019-01-17 13:47
【摘要】：本文根据乐清市体育中心体育馆和游泳馆采用的结构形式,综合给出并研讨了一种具有内外环桁架的新型内外双重张弦网壳结构,且外张弦体系可穿越网壳,内环桁架可采用上弦梁下弦索(梁)的空腹桁架。这种空间结构与传统辐射式张弦梁结构或弦支网壳相比,可为场馆内部提供更多的使用空间,增加了后排座位的可视范围,结构受力更为合理,技术经济指标优异。为更好地理解这种新型空间张弦网壳结构的受力特性并促进其工程应用,本文从形状确定、力学性能、稳定性、地震响应及模型试验等方面进行了系统研究。 第1章总结了大跨度空间结构的发展历程和分类,系统地回顾了张弦梁与环形平面张力索桁结构的发展历史、工程应用和研究现状,并从以上两种结构的形体对这种新型张弦网壳结构进行了对比分析和说明。与此同时,对本文的研究内容做了简单介绍。 第2章归纳和总结了具有内外环桁架的新型张弦网壳结构的结构形式,从网壳网格布设、径向索与网壳径向梁的相对位置、网壳的高斯曲率、内外环曲线形状、及内孔采用不同结构的内外双重张弦网壳结构等五个方面对这种新型张弦网壳结构进行了分类。 第3章对空间结构形状确定问题的研究方法进行了归纳和总结。以肋环型内外双重张弦网壳结构为例,对这种新型张弦网壳结构的形状确定问题进行了研究。采用局部分析法的思想,从节点平衡关系入手,给出了内外双重张弦网壳结构体系的初始预内力简捷计算法及其计算用表；在原有数值计算法的基础上,提出了改进的数值计算法,并对计算过程参数的选取进行了讨论。通过算例比较了以上两种找形方法的计算结果,说明了方法的正确性。 第4章系统地研究了新型空间张弦网壳结构的静力性能,以具有内外环桁架的肋环型张弦网壳结构为例,利用大型有限元软件ANSYS进行了结构在满跨和半跨荷载下的静力性能分析；并对张拉索矢高、网壳曲率、网壳面内径向支撑、环形水平桁架以及网壳网格形式等主要参数对结构受力性能的影响进行了分析。 第5章以具有内外环桁架的肋环型张弦网壳结构为例,对结构进行了满跨和半跨荷载作用下结构的稳定性能分析；对张弦网壳结构的张拉索矢高、网壳曲率、网壳面内径向支撑、环形水平桁架以及网壳网格形式等主要参数进行了分析；讨论了缺陷分布及大小对结构稳定性能的影响；比较了肋环型、葵花型及施威德勒型等三种张弦网壳结构的稳定性及经济性。 第6章以具有内外环桁架的肋环型张弦网壳结构为例,研究这一结构的动力特性和抗震性能。对该结构进行自振特性分析；利用EI-Centro波对具有内外环桁架的肋环型张弦网壳结构进行了地震响应时程分析；并研究了张拉索矢高、网壳曲率、网壳面内径向支撑以及环形水平桁架等参数对其动力性能的影响。 第7章以乐清市体育中心体育馆屋盖结构为背景,按照1：15比例设计和制作了缩尺模型。对其进行了下部索杆预应力张拉试验、静力加载试验、局部断索(杆)试验和自振特性测试,并对试验实测数据与理论分析结果进行了比较和分析。 第8章对本文研究的内容进行了归纳和总结,指出了具有内外环桁架的新型空间张弦网壳结构仍需要解决的一些问题,明确了今后的研究方向。
[Abstract]:Based on the structure of the sports center and the swimming pool in the city of Leqing, this paper presents and discusses a new inner and outer double-string net shell structure with inner and outer ring frame, and the outer string system can pass through the net shell. The inner ring frame can adopt the hollow frame of the lower chord (beam) of the upper chord beam. Compared with the traditional radiation-type beam-string beam structure or the string-supporting net shell, the space structure can provide more space for the interior of the venue, and the visible range of the rear row seat is increased, the structure stress is more reasonable, and the technical and economic indicators are excellent. In order to better understand the force characteristics of this new type of space-string net shell structure and to promote its engineering application, this paper has made systematic research from the aspects of shape determination, mechanical property, stability, seismic response and model test. Chapter 1 summarizes the development process and classification of large-span spatial structure, and systematically reviews the development history, engineering application and research of the structure of the long-span spatial structure. In this paper, the structure of this new type of tension-string net shell is compared and analyzed from the above two structures. In the meantime, this paper has made a brief introduction to the contents of this paper. In the second chapter, the structure form of a new type of string net shell structure with inner and outer ring frame is summarized and summarized, from the grid cloth, the relative position of the radial cable and the radial beam of the net shell, the Gaussian curvature of the net shell, the inner and outer ring curvature, The shape of the wire and the inner hole are made of five aspects, such as the inner and outer double-string net shell structure with different structure, and the like, The method of the study on the determination of the shape of the space structure is discussed in Chapter 3. In this paper, the shape and shape of the shell structure of this new type of tension-string net shell are determined by the structure of the inner and outer double-string net shell of the rib ring. In this paper, a new method for calculating the initial internal force of the inner and outer double-string net shell structure system and its calculation table are given by using the idea of the local analysis method and the equilibrium relation of the nodes. On the basis of the original numerical calculation method, the improvement is put forward. The Method of Numerical Calculation and the Selection of the Parameters of the Calculation Process The discussion is made. The calculation results of the above two methods of finding are compared by the calculation example, and the formula is described. The validity of the method is presented in Chapter 4. The static performance of a new type of space-string net shell structure is systematically studied in Chapter 4, and the static performance analysis of the structure under the full span and the semi-span load is carried out by using the large-scale finite element software ANSYS. The main parameters such as the height of the tension cable, the curvature of the net shell, the radial support in the surface of the net shell, the annular horizontal frame and the grid form of the net shell are also applied to the stress performance of the structure, The influence is analyzed. Chapter 5 is an example of the structure of the rib ring-shaped string net shell with the inner and outer ring frame. The stability of the structure is analyzed by the full span and the semi-span load of the structure. The height of the tension cable and the curvature of the net shell are high. The main parameters such as the radial support, the annular horizontal frame and the grid form of the net shell are analyzed. The effect of the defect distribution and the size on the stability of the structure is discussed, and the three kinds of string net shell junctions such as the rib ring type, the sunflower type and the Schweedler type are compared. The stability and economy of the structure are presented in Chapter 6. The structure of the ring-shaped cross-section of the rib ring with the inner and outer ring-shaped frame is an example, and the junction is studied. The dynamic characteristics and the anti-seismic performance of the structure are studied. The self-vibration characteristics of the structure are analyzed, and the seismic response is carried out by using the EI-Centro wave to the structure of the rib ring-type tension-string network with the inner and outer ring-shaped frame. The height of the tension cable, the curvature of the net shell, the radial support in the surface of the net shell, the annular horizontal frame, etc. The influence of the parameters on the power performance of the sports center is as follows: 1: 1, based on the structure of the indoor cover of the sports center of Leqing City. The scale model is designed and made in 5 scale. The lower cable-rod pre-stressed tensile test, the static loading test, the partial cable break (rod) test and the self-vibration characteristic test are carried out, and the data and the results of the test are measured. The results of the analysis are compared and analyzed. Chapter 8 summarizes and summarizes the contents of this paper, and points out that the new type of space-string net shell structure with inner and outer ring is still needs to be solved.
【学位授予单位】：浙江大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU399
本文编号：2410118
[Abstract]:Based on the structure of the sports center and the swimming pool in the city of Leqing, this paper presents and discusses a new inner and outer double-string net shell structure with inner and outer ring frame, and the outer string system can pass through the net shell. The inner ring frame can adopt the hollow frame of the lower chord (beam) of the upper chord beam. Compared with the traditional radiation-type beam-string beam structure or the string-supporting net shell, the space structure can provide more space for the interior of the venue, and the visible range of the rear row seat is increased, the structure stress is more reasonable, and the technical and economic indicators are excellent. In order to better understand the force characteristics of this new type of space-string net shell structure and to promote its engineering application, this paper has made systematic research from the aspects of shape determination, mechanical property, stability, seismic response and model test. Chapter 1 summarizes the development process and classification of large-span spatial structure, and systematically reviews the development history, engineering application and research of the structure of the long-span spatial structure. In this paper, the structure of this new type of tension-string net shell is compared and analyzed from the above two structures. In the meantime, this paper has made a brief introduction to the contents of this paper. In the second chapter, the structure form of a new type of string net shell structure with inner and outer ring frame is summarized and summarized, from the grid cloth, the relative position of the radial cable and the radial beam of the net shell, the Gaussian curvature of the net shell, the inner and outer ring curvature, The shape of the wire and the inner hole are made of five aspects, such as the inner and outer double-string net shell structure with different structure, and the like, The method of the study on the determination of the shape of the space structure is discussed in Chapter 3. In this paper, the shape and shape of the shell structure of this new type of tension-string net shell are determined by the structure of the inner and outer double-string net shell of the rib ring. In this paper, a new method for calculating the initial internal force of the inner and outer double-string net shell structure system and its calculation table are given by using the idea of the local analysis method and the equilibrium relation of the nodes. On the basis of the original numerical calculation method, the improvement is put forward. The Method of Numerical Calculation and the Selection of the Parameters of the Calculation Process The discussion is made. The calculation results of the above two methods of finding are compared by the calculation example, and the formula is described. The validity of the method is presented in Chapter 4. The static performance of a new type of space-string net shell structure is systematically studied in Chapter 4, and the static performance analysis of the structure under the full span and the semi-span load is carried out by using the large-scale finite element software ANSYS. The main parameters such as the height of the tension cable, the curvature of the net shell, the radial support in the surface of the net shell, the annular horizontal frame and the grid form of the net shell are also applied to the stress performance of the structure, The influence is analyzed. Chapter 5 is an example of the structure of the rib ring-shaped string net shell with the inner and outer ring frame. The stability of the structure is analyzed by the full span and the semi-span load of the structure. The height of the tension cable and the curvature of the net shell are high. The main parameters such as the radial support, the annular horizontal frame and the grid form of the net shell are analyzed. The effect of the defect distribution and the size on the stability of the structure is discussed, and the three kinds of string net shell junctions such as the rib ring type, the sunflower type and the Schweedler type are compared. The stability and economy of the structure are presented in Chapter 6. The structure of the ring-shaped cross-section of the rib ring with the inner and outer ring-shaped frame is an example, and the junction is studied. The dynamic characteristics and the anti-seismic performance of the structure are studied. The self-vibration characteristics of the structure are analyzed, and the seismic response is carried out by using the EI-Centro wave to the structure of the rib ring-type tension-string network with the inner and outer ring-shaped frame. The height of the tension cable, the curvature of the net shell, the radial support in the surface of the net shell, the annular horizontal frame, etc. The influence of the parameters on the power performance of the sports center is as follows: 1: 1, based on the structure of the indoor cover of the sports center of Leqing City. The scale model is designed and made in 5 scale. The lower cable-rod pre-stressed tensile test, the static loading test, the partial cable break (rod) test and the self-vibration characteristic test are carried out, and the data and the results of the test are measured. The results of the analysis are compared and analyzed. Chapter 8 summarizes and summarizes the contents of this paper, and points out that the new type of space-string net shell structure with inner and outer ring is still needs to be solved.
【学位授予单位】：浙江大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TU399
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