矩形空翼缘Z型梁静力稳定性能分析
发布时间：2018-08-19 14:49
【摘要】：近几年钢结构建筑在国内的发展较为迅速，应用范围不断扩大，钢结构建筑在整个世界的建筑结构领域有着巨大的发展空间。而轻型钢结构又有施工速度相对较快，造型美观，节省原料，造价较低等优点，因此轻钢结构也越来越多地应用到建筑结构中。 冷弯薄壁构件是轻钢结构的主要构件形式之一，钢梁是常用的构件，其用量关系到整个工程的造价。本文在澳大利亚LSB的基础上提出一种新型截面形式的冷弯薄壁钢梁ZLSB。ZLSB是由高强钢板冷弯成型后经高频电阻焊焊接而成。本文利用有限元软件ANSYS计算分析了ZLSB在三种不同形式荷载（均布荷载、集中力及纯弯）作用下的承载力以及屈曲模式。本文主要工作如下： (1)建立矩形空翼缘Z型梁ZLSB的有限元分析模型，分别计算ZLSB梁在纯弯荷载、均布荷载及集中荷载作用下的弹性屈曲承载力和极限抗弯承载力，其跨度变化范围为2m到8m。考虑到ZLSB梁作为檩条使用时的连接方式，本文将对边界支撑角钢高度变化对其承载力的影响进行探究，，通过关键点荷载位移曲线对构件进行受力全过程分析。 (2)改变矩形空翼缘Z型梁的几何及构造参数，如腹板厚度和连接角钢高度及拉条的设置，探究各参数对其极限抗弯承载力和失稳模式的影响。 (3)回归拟合了ZLSB梁在梁端弯矩、集中荷载、均布荷载作用下的抗弯承载力公式； (4)探究在三种不同荷载作用下，腹板开洞对空翼缘梁ZLSB承载力的影响。
[Abstract]:In recent years, the steel structure building has been developing rapidly in China, and its application scope has been expanding constantly. The steel structure building has a huge space for development in the whole world. The light steel structure has the advantages of relatively fast construction speed, beautiful shape, saving raw materials, low cost and so on. Therefore, light steel structure is more and more used in building structure. The cold-formed thin-walled member is one of the main member forms of light steel structure, and the steel beam is a commonly used component, and its amount is related to the cost of the whole project. On the basis of Australian LSB, a new type of cold-formed thin-walled steel beam ZLSB.ZLSB is proposed, which is welded by high frequency resistance welding after cold bending of high-strength steel plate. In this paper, the load-carrying capacity and buckling mode of ZLSB under three different forms of load (uniform load, concentrated force and pure bending) are calculated and analyzed by the finite element software ANSYS. The main work of this paper is as follows: (1) the finite element analysis model of ZLSB of rectangular empty flange Z beam is established, and the elastic buckling capacity and ultimate flexural bearing capacity of ZLSB beam under pure bending load, uniform load and concentrated load are calculated, respectively. Its span ranges from 2m to 8m. Considering the connection mode of ZLSB beam as purlin, the influence of the height change of boundary braced angle steel on its bearing capacity will be studied in this paper. The load and displacement curve of the key point is used to analyze the whole process of loading. (2) changing the geometric and structural parameters of the Z-shaped beam with rectangular empty flange, such as the thickness of the web, the height of the connecting angle and the setting of the drawing strip. The influence of various parameters on ultimate flexural bearing capacity and instability mode is investigated. (3) the formula of bending capacity of ZLSB beam under the action of bending moment, concentrated load and uniform load is fitted by regression. (4) the effect of web opening on ZLSB bearing capacity of empty flange beam under three different loads is investigated.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU392.5
本文编号：2191980
[Abstract]:In recent years, the steel structure building has been developing rapidly in China, and its application scope has been expanding constantly. The steel structure building has a huge space for development in the whole world. The light steel structure has the advantages of relatively fast construction speed, beautiful shape, saving raw materials, low cost and so on. Therefore, light steel structure is more and more used in building structure. The cold-formed thin-walled member is one of the main member forms of light steel structure, and the steel beam is a commonly used component, and its amount is related to the cost of the whole project. On the basis of Australian LSB, a new type of cold-formed thin-walled steel beam ZLSB.ZLSB is proposed, which is welded by high frequency resistance welding after cold bending of high-strength steel plate. In this paper, the load-carrying capacity and buckling mode of ZLSB under three different forms of load (uniform load, concentrated force and pure bending) are calculated and analyzed by the finite element software ANSYS. The main work of this paper is as follows: (1) the finite element analysis model of ZLSB of rectangular empty flange Z beam is established, and the elastic buckling capacity and ultimate flexural bearing capacity of ZLSB beam under pure bending load, uniform load and concentrated load are calculated, respectively. Its span ranges from 2m to 8m. Considering the connection mode of ZLSB beam as purlin, the influence of the height change of boundary braced angle steel on its bearing capacity will be studied in this paper. The load and displacement curve of the key point is used to analyze the whole process of loading. (2) changing the geometric and structural parameters of the Z-shaped beam with rectangular empty flange, such as the thickness of the web, the height of the connecting angle and the setting of the drawing strip. The influence of various parameters on ultimate flexural bearing capacity and instability mode is investigated. (3) the formula of bending capacity of ZLSB beam under the action of bending moment, concentrated load and uniform load is fitted by regression. (4) the effect of web opening on ZLSB bearing capacity of empty flange beam under three different loads is investigated.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU392.5
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本文编号：2191980
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