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济南大型广告牌的设计要考虑过重量吗?

所属分类:公司动态 发布时间:2020-10-14 来源:http://www.jnguanggaopai.com/ 浏览量:18

结构型式的选择独立钢柱大型钢结构广告牌的主体结构,目前常采用的形式有两种:一种为T其主骨架由一根独立钢柱和上部一根横向主梁呈T型焊接而成,该体系主体结构受力明确,由立柱顶上焊接一根横梁形成固结于地基上的T形刚架结构体系,广告灯箱面板通过各挂件及斜撑与T,其主骨架由一根独立钢柱和上部几道相互平行的横向主梁焊接而成,主梁之间由水平及斜向支撑连接,,广告灯箱直接挂靠在主骨架上。
At present, there are two forms of the main structure of large steel structure billboard: one is t, the main frame of which is made up of an independent steel column and a transverse main beam in the upper part in a T-shape welding. The main structure of the system has clear stress, and a beam is welded on the top of the column to form a T-shaped rigid frame structure system consolidated on the foundation, The panel of advertising light box is connected with T through various hangers and diagonal braces. Its main framework is welded by an independent steel column and several parallel transverse main beams in the upper part. The main beams are connected by horizontal and oblique supports, and the advertising light box is directly attached to the main framework.
经过比选,:第一,广告牌结构的控制设计荷载是风载,,再由面板传至骨架,此时,因而可减小主梁与立柱连接处的应力集中;平行式桁架结构主梁采用槽钢,使结构外形平整,便于广告面板挂靠,,从而减小了面板的变形,以确保广告面的感观效果;平行式桁架结构,可在每道主梁高程设置内检修梯,这样给结构的维护、检修及挂、卸广告布带来了极大的方便,且保证了操作人员的人身安全;除此之外,,形式简洁、美观,受力明确,,施工方便,从而能保证施工质量。
Through comparison and selection, firstly, the control design load of the billboard structure is the wind load, which is transmitted from the panel to the skeleton, at this time, the stress concentration at the joint of the main beam and the column can be reduced; the main beam of the parallel truss structure is made of channel steel to make the structure smooth and convenient for the attachment of the advertising panel, so as to reduce the deformation of the panel and ensure the visual effect of the advertising surface, The internal maintenance ladder can be set at the elevation of each main beam, which brings great convenience to the maintenance, repair, hanging and unloading of advertising cloth, and ensures the personal safety of operators; in addition, the form is simple, beautiful, the stress is clear, and the construction is convenient, so as to ensure the construction quality.
结构布置本工程采用独立钢结构圆柱,,主梁之间设置横隔梁和斜向支撑,形成空间桁架受力体系,,并使面板骨架节点与主骨架节点相一致,以加强面板与主骨架的连接。广告牌面板的自身骨架挂焊在主体结构上,形成整体上部结构。主梁选用槽钢,其他构件均选用角钢,除考虑其强度及稳定性外,结构分析
The structure layout of the project adopts independent steel structure column, and the diaphragm beam and diagonal support are set between the main beams to form the space truss stress system, and make the panel skeleton node consistent with the main skeleton node, so as to strengthen the connection between the panel and the main skeleton. The framework of the billboard panel is hung and welded on the main structure to form the overall superstructure. The main beam is made of channel steel, and other members are made of angle steel. In addition to considering its strength and stability, structural analysis is carried out
荷载和荷载组合结构承受的主要荷载有:1)风荷载;3)检修活载;5)荷载组合有三类:1)特殊组合;3)应力分析由于钢立柱为压弯构件,计算表明,上部结构的主梁可简化为刚结或铰结在钢立柱上的悬臂结构,主梁之间由横梁及斜撑铰结形成空间平行组合桁架。内力计算采用有限元程序在计算机上完成。
济南大型广告牌
Load and load combination structure bears the following main loads: 1) wind load; 3) maintenance live load; 5) load combination has three types: 1) special combination; 3) stress analysis since the steel column is a compression bending member, the calculation shows that the main beam of the upper structure can be simplified as a rigid or hinged cantilever structure on the steel column, and the space parallel composite truss is formed by the beam and diagonal brace hinge between the main beams. The calculation of internal force is completed by finite element program on computer.
根据钢结构设计理论,,其强度可达到母材的强度,因而无需验算焊缝应力,焊缝承受杆件间的应力传递,,对广告牌之类结构,上部结构杆件受力一般不大,可用围焊,并统一取焊脚尺寸为hf=10mm,;但对广告牌面板骨架与主骨架挂点处焊接须逐一核算。
According to the design theory of steel structure, the strength can reach the strength of base metal, so there is no need to check the weld stress, and the weld bears the stress transfer between members. For billboards and other structures, the upper structure members are generally not stressed, and can be welded by girdling, and the welding foot size is HF = 10 mm; however, the welding of the hanging points between the billboard panel frame and the main framework must be calculated one by one.
变位控制
Displacement control
广告牌立柱高18m,,上部结构为悬臂桁架,在风载及自重作用下,,如果这些变位过大,将直接影响到广告牌的使用及感观效果,这些变位还将引起附加内力,增大结构内部的应力,降低结构的安全性,在广告牌设计中应严格限制变位。根据《钢结构设计规范》(GBJ17?88)广告牌水平向设计变位应控制在10mm以内为宜。
The height of billboard column is 18m, and the upper structure is cantilever truss. Under the action of wind load and self weight, if these displacements are too large, they will directly affect the use and sensory effect of billboards. These displacements will also cause additional internal forces, increase the internal stress of the structure, and reduce the safety of the structure. In the design of billboards, the displacement should be strictly limited. According to the code for design of steel structures (GBJ17? 88), the horizontal displacement of billboard should be controlled within 10 mm.
基础工程设计
Foundation engineering design
基础型式及布置作为该类型广告牌的基础型式主要有两种:一种是平衡重力式,即上部荷载主要由大体积基础重力来平衡,混凝土用量也较多,但施工简单,适宜在土质松软且有开阔的施工场地时利用。另一种为桩基式,其中又以扩孔桩为主,,其优点是基础施工场面很小,混凝土用量仅为平衡重力式基础的三分之一左右,
As the foundation type and layout of this type of billboard, there are mainly two types of foundation types: one is the balanced gravity type, that is, the upper load is mainly balanced by the gravity of the large volume foundation, and the amount of concrete is more, but the construction is simple, and it is suitable for use when the soil is soft and there is an open construction site. The other is pile foundation type, in which reamed pile is the main one. Its advantage is that the foundation construction site is very small, and the concrete consumption is only about one third of that of the balanced gravity foundation,
由于本广告牌建在某火车站站前广场两侧花坛内,若放坡开挖基坑,势必破坏两侧的广场混凝土地坪和水泥混凝土路面,其修复工程造价可观,,经综合比较,选用了人工挖孔扩底桩基础,基础上部4m表层填土和第二层粉质粘土)不扩孔,采用直径为1.5m从4m第三层粘土)开始扩孔,以增大基底的受荷面积,,尺寸为3×3m,基础底下设置十字正交齿墙,以增强基础的抗扭和抗剪切能力。
As this billboard is built in flower beds on both sides of the square in front of a railway station, if the foundation pit is excavated by slope, the concrete floor and cement concrete pavement on both sides will be destroyed. The repair project cost is considerable. After comprehensive comparison, the manual hole digging and belled pile foundation is selected. The upper 4m surface soil and the second layer of silty clay are not reamed, and the diameter is 1.5m, starting from the 4m third layer of clay), In order to increase the load-bearing area of the foundation, the size is 3 × 3M, and the cross orthogonal tooth wall is set under the foundation to enhance the torsional and shear resistance of the foundation.
桩基础结构计算在桩基础结构计算中,法和m,两种方法计算结果比较一致,桩身弯矩出现在距地面62mm(m处,4.86mm(m法为4.78mm)。桩身材料强度和配筋计算,
In the calculation of pile foundation structure, the calculation results of method and m are consistent. The bending moment of pile body appears at 62mm (m, 4.86mm) from the ground (m method is 4.78mm). Calculation of pile material strength and reinforcement,
基础设计须考虑轴力、弯矩、扭矩等不同组合的作用,以保证基础本身的强度、刚度及地基的承载力和抗剪强度均满足规范要求。
Different combinations of axial force, bending moment and torque should be considered in the foundation design to ensure that the strength and stiffness of the foundation, the bearing capacity and shear strength of the foundation meet the requirements of the code.
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