格构轻钢双向梁承载力试验研究及分析
发布时间：2019-06-24 14:20
【摘要】：近年来,轻钢结构因其巨大的经济优势、良好的抗震及节能环保性能,已被广泛应用于低层和多层房屋中。由于双向梁难于制造,节点构造复杂,传统轻钢龙骨结构的楼面梁均为单向密布的实腹梁或桁(刚)架构成。这种单向梁体系构造简单,但仅沿墙的一个方向设置,墙体单方向受力,不能充分发挥墙体的承载力,且梁截面较高,刚度相对较小。 本文提出了一种新型的轻钢结构楼面梁体系—由单向桁架梁相互交叉连接而成的双向桁架体系。其中桁架梁的上下弦杆为口40×20×1.2Imn的冷弯薄壁矩形钢管,腹杆是标准的Z字型连接件,由φ25的圆管在端部冲压再折弯制作而成。腹杆与上下弦杆和梁与梁之间通过自攻螺丝或者螺栓连接。 论文详细介绍了格构轻钢双向梁的材料、构成、制作和安装方法并总结了其特点；对相同规格尺寸的3m×3m跨的双向梁和单向梁分别进行了竖向均布荷载下的承载力试验,叙述了试验的装置,过程和荷载加载方法,测得了其在各级荷载下典型位置的应变和挠度,得到它们的极限承载力和破坏模态,作出了荷载—位移曲线和荷载—应变曲线图,并进行了对比；利用有限元软件非线性分析得到了双向、单向梁的力学性能、挠度、破坏模态和承载力等。试验与有限元分析结果有一定的差异,文中分析了其原因。通过本文分析结果表明此种格构轻钢双向梁体系的挠度较大,但可以用在一些承担荷载小的轻钢房屋楼面或者屋面中。 最后,本文给出了一些格构轻钢双向梁体系试验和理论研究的改进建议,为今后此类结构体系的实际工程设计提供一些依据和未来的研究方向提供了参考。
[Abstract]:In recent years, light steel structure has been widely used in low-rise and multi-storey buildings because of its great economic advantages, good seismic and energy-saving and environmental protection performance. Because the two-way beam is difficult to manufacture and the joint structure is complex, the floor beam of the traditional light steel keel structure is composed of one-way dense solid web beam or truss (rigid) frame. The structure of the one-way beam system is simple, but only along one direction of the wall, the unidirectional force of the wall can not give full play to the bearing capacity of the wall, and the beam section is higher and the stiffness is relatively small. In this paper, a new type of light steel structure building surface beam system, which is composed of unidirectional truss beams intersecting with each other, is proposed. The upper and lower chord of the truss beam is a cold-formed thin-wall rectangular steel pipe with a mouth of 40 脳 20 脳 1.2Imn, and the web is a standard Z-shaped connector, which is made of 蠁 25 circular pipe stamping and bending at the end. The web is connected to the upper and lower chord and the beam to the beam by tapping screws or bolts. In this paper, the material, composition, manufacture and installation method of lattice light steel bidirectional beam are introduced in detail, and its characteristics are summarized. The bearing capacity tests of bidirectional beams and unidirectional beams with the same specification size of 3m 脳 3m span under vertical uniform load are carried out respectively. the test device, process and load loading method are described. the strain and deflection of typical positions under various loads are measured, their ultimate bearing capacity and failure mode are obtained, and the load-displacement curve and load-strain curve are made and compared. The mechanical properties, deflection, failure mode and bearing capacity of bidirectional and unidirectional beams are obtained by nonlinear analysis of finite element software. There is a certain difference between the experimental results and the finite element analysis results, and the reasons are analyzed in this paper. The results of this paper show that the deflection of the lattice light steel two-way beam system is large, but it can be used in the floor or roof of some light steel houses with small load. Finally, some suggestions for improving the test and theoretical research of lattice light steel two-way beam system are given, which provides some references for the practical engineering design of this kind of structure system in the future and the future research direction.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU392.5
本文编号：2505128
[Abstract]:In recent years, light steel structure has been widely used in low-rise and multi-storey buildings because of its great economic advantages, good seismic and energy-saving and environmental protection performance. Because the two-way beam is difficult to manufacture and the joint structure is complex, the floor beam of the traditional light steel keel structure is composed of one-way dense solid web beam or truss (rigid) frame. The structure of the one-way beam system is simple, but only along one direction of the wall, the unidirectional force of the wall can not give full play to the bearing capacity of the wall, and the beam section is higher and the stiffness is relatively small. In this paper, a new type of light steel structure building surface beam system, which is composed of unidirectional truss beams intersecting with each other, is proposed. The upper and lower chord of the truss beam is a cold-formed thin-wall rectangular steel pipe with a mouth of 40 脳 20 脳 1.2Imn, and the web is a standard Z-shaped connector, which is made of 蠁 25 circular pipe stamping and bending at the end. The web is connected to the upper and lower chord and the beam to the beam by tapping screws or bolts. In this paper, the material, composition, manufacture and installation method of lattice light steel bidirectional beam are introduced in detail, and its characteristics are summarized. The bearing capacity tests of bidirectional beams and unidirectional beams with the same specification size of 3m 脳 3m span under vertical uniform load are carried out respectively. the test device, process and load loading method are described. the strain and deflection of typical positions under various loads are measured, their ultimate bearing capacity and failure mode are obtained, and the load-displacement curve and load-strain curve are made and compared. The mechanical properties, deflection, failure mode and bearing capacity of bidirectional and unidirectional beams are obtained by nonlinear analysis of finite element software. There is a certain difference between the experimental results and the finite element analysis results, and the reasons are analyzed in this paper. The results of this paper show that the deflection of the lattice light steel two-way beam system is large, but it can be used in the floor or roof of some light steel houses with small load. Finally, some suggestions for improving the test and theoretical research of lattice light steel two-way beam system are given, which provides some references for the practical engineering design of this kind of structure system in the future and the future research direction.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU392.5
【参考文献】
相关期刊论文 前10条
1 刘建平;钢管相贯节点的研究现状和动向[J];钢结构;2003年04期
2 戴雅萍;赵宏康;;苏州国际博览中心钢结构楼面设计[J];钢结构;2005年06期
3 杨霞;;中国国家博物馆改扩建工程双层钢桁架施工技术[J];钢结构;2011年08期
4 金昌成;;冷弯型钢屈服强度计算公式的探讨[J];冶金建筑;1982年03期
5 秦杰;徐瑞龙;覃阳;徐亚柯;高恒;李振宝;;国家体育馆双向张弦结构预应力施工模型试验研究[J];工业建筑;2007年01期
6 周斌;杨卫星;;型钢混凝土井字梁在地铁车站中的应用[J];工程建设与设计;2012年12期
7 陈厚载;;镀锌钢管生产的发展方向[J];钢管技术;1988年01期
8 杨晓光;钢筋混凝土井式楼盖结构的设计[J];河北煤炭;2002年01期
9 陈以一,陈扬骥;钢管结构相贯节点的研究现状[J];建筑结构;2002年07期
10 聂建国;卜凡民;;单、双向钢-混凝土组合楼盖对比分析及设计建议[J];建筑结构;2011年01期
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