大跨度开洞网架结构静动力性能研究
发布时间：2018-10-12 17:42
【摘要】：网架结构具有空间受力合理、自重轻、空间刚度大以及形式多样新颖、容易满足艺术创造力等多种其他结构难以取代的优点,因而被广泛应用于各种大型公共建筑、大型体育场馆、会展中心、博物馆、火车站、工业厂房等大跨度结构和具有某些特殊功能要求的结构中,成为了目前应用最为广泛的大跨度结构形式之一。然而,由于一些建筑在使用功能上、造型上等方面的要求,部分大跨度结构需要在不同的部位开洞,导致屋盖平面形状不规则,在目前对此类开洞网架结构研究甚少和现行设计方法尚未有明确规定的情况下,对其静动力性能进行分析研究是非常有意义的。本文采用有限元方法,对大跨度开洞网架结构进行了静力特性、稳定性、自振特性及地震响应进行了分析,研究了不同开洞大小和位置对网架静动力特性的影响,并提出了设计建议,主要研究包括以下几个方面的内容： 1.对开洞、不开洞及加强洞口等网架结构进行静力分析,研究了不同开洞大小和位置对网架结构内力、位移分布等情况的影响,对比分析了开洞和不开洞结构的静力特性,并对开洞网架结构提出加强刚度和承载力的措施。 2.对开洞、不开洞及加强洞口等网架结构进行线性屈曲分析和非线性屈曲分析。考虑材料和几何双重非线性,研究了不同开洞大小和位置对网架结构稳定承载力的影响,并对比分析了开洞和不开洞结构的稳定承载力。 3.对开洞、不开洞及加强洞口等网架结构进行有限元模态分析,获取各阶自振频率及对应振型,分析了不同开洞大小和位置对网架结构自振特性的影响。 4.利用振型反应谱和时程法分别对开洞、不开洞及加强洞口等网架结构进行了地震分析,得出了开洞网架结构在地震作用下的位移、轴力,并对比分析了开洞与不开洞网架结构计算结果上的差异,研究了不同开洞大小和位置对网架结构抗震承载力的影响。
[Abstract]:The space truss structure has the advantages of reasonable space force, light weight, large spatial stiffness, various and novel forms, easy to meet the artistic creativity and other difficult to replace other structures, so it is widely used in all kinds of large public buildings. Large-scale stadiums, exhibition centers, museums, railway stations, industrial buildings and other long-span structures and structures with some special functional requirements have become one of the most widely used long-span structures. However, due to the requirements of some buildings in the aspects of function and shape, some long-span structures need to open holes in different parts, resulting in irregular plane shape of roof. It is very meaningful to analyze and study the static and dynamic performance of this kind of open hole space truss structure under the condition that there are few researches on it and the current design method has not been clearly stipulated at present. In this paper, the static characteristics, stability, natural vibration characteristics and seismic response of long-span open-hole space truss structures are analyzed by using finite element method, and the effects of different hole sizes and positions on the static and dynamic characteristics of grid structures are studied. And put forward the design suggestions, the main research includes the following aspects: 1. In this paper, the static analysis of space truss structure such as opening, non-opening and strengthening hole is carried out, and the influence of different hole size and position on the internal force and displacement distribution of space truss structure is studied, and the static characteristics of the opening structure and the non-opening structure are compared and analyzed. The measures to strengthen the stiffness and bearing capacity of the open space truss structure are put forward. 2. Linear buckling analysis and nonlinear buckling analysis are carried out for space truss structures such as openings, non-openings and reinforced openings. Considering the double nonlinearity of material and geometry, the influence of different hole sizes and positions on the stability bearing capacity of space truss structures is studied, and the stability bearing capacity of open and non-perforated structures is compared and analyzed. The finite element modal analysis is carried out for the space truss structures, such as opening, non-opening and strengthening openings, and the natural frequencies and corresponding modes of each order are obtained, and the influence of the size and position of the holes on the natural vibration characteristics of the latticed truss structures is analyzed. 4. In this paper, the seismic analysis of the reticulated structures such as opening, non-opening and strengthening openings are carried out by using the mode response spectrum and the time-process method, respectively, and the displacement and axial forces of the open-hole grid structures under earthquake action are obtained. The difference between the calculation results of the space truss structure with and without holes is analyzed, and the influence of the size and position of the opening hole on the seismic bearing capacity of the space truss structure is studied.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TU356;TU311
本文编号：2267024
[Abstract]:The space truss structure has the advantages of reasonable space force, light weight, large spatial stiffness, various and novel forms, easy to meet the artistic creativity and other difficult to replace other structures, so it is widely used in all kinds of large public buildings. Large-scale stadiums, exhibition centers, museums, railway stations, industrial buildings and other long-span structures and structures with some special functional requirements have become one of the most widely used long-span structures. However, due to the requirements of some buildings in the aspects of function and shape, some long-span structures need to open holes in different parts, resulting in irregular plane shape of roof. It is very meaningful to analyze and study the static and dynamic performance of this kind of open hole space truss structure under the condition that there are few researches on it and the current design method has not been clearly stipulated at present. In this paper, the static characteristics, stability, natural vibration characteristics and seismic response of long-span open-hole space truss structures are analyzed by using finite element method, and the effects of different hole sizes and positions on the static and dynamic characteristics of grid structures are studied. And put forward the design suggestions, the main research includes the following aspects: 1. In this paper, the static analysis of space truss structure such as opening, non-opening and strengthening hole is carried out, and the influence of different hole size and position on the internal force and displacement distribution of space truss structure is studied, and the static characteristics of the opening structure and the non-opening structure are compared and analyzed. The measures to strengthen the stiffness and bearing capacity of the open space truss structure are put forward. 2. Linear buckling analysis and nonlinear buckling analysis are carried out for space truss structures such as openings, non-openings and reinforced openings. Considering the double nonlinearity of material and geometry, the influence of different hole sizes and positions on the stability bearing capacity of space truss structures is studied, and the stability bearing capacity of open and non-perforated structures is compared and analyzed. The finite element modal analysis is carried out for the space truss structures, such as opening, non-opening and strengthening openings, and the natural frequencies and corresponding modes of each order are obtained, and the influence of the size and position of the holes on the natural vibration characteristics of the latticed truss structures is analyzed. 4. In this paper, the seismic analysis of the reticulated structures such as opening, non-opening and strengthening openings are carried out by using the mode response spectrum and the time-process method, respectively, and the displacement and axial forces of the open-hole grid structures under earthquake action are obtained. The difference between the calculation results of the space truss structure with and without holes is analyzed, and the influence of the size and position of the opening hole on the seismic bearing capacity of the space truss structure is studied.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TU356;TU311
【引证文献】
相关硕士学位论文 前1条
1 徐驱;大跨度三角锥网架结构开洞下的性能研究[D];长沙理工大学;2012年
，本文编号：2267024
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