近年来，桥架已在有的工程中加以应用，具有美观，重量轻、安装方便等优点。那么您知道 山东电缆桥架设计的相应系统组成内容是怎样的吗？

In recent years, the bridge has been applied in some projects, with the advantages of beauty, light weight and convenient installation. Do you know what the corresponding system composition of Shandong cable bridge design is?

桥架结构

Bridge structure

电缆桥架分为槽式、托盘式和梯架式等结构，由支架、托臂和安装附件等组成。(参见图1所示)，选型时应注意桥架的所有零部件是否符合系列化、通用化、标准化的成套要求。

The cable tray is divided into trough type, tray type and ladder type structures, which are composed of brackets, brackets and installation accessories. (as shown in Fig. 1), during type selection, attention shall be paid to whether all parts of the bridge meet the requirements of serialization, generalization and standardization.

建筑物内桥架可以独立假设，也可以附设在各种建(构）筑物和管廊支架上，应体现结构简单，造型美观、配置灵活和维修方便等特点，全部零件均需进行镀锌处理，安装在建筑物外露天的桥架，如果是在邻近海边或属于腐蚀区，则材质须具有防腐、耐潮气、附着力好，耐冲击强度高的物性特点。

The bridge in the building can be assumed independently or attached to various buildings (structures) and pipe gallery supports. It should reflect the characteristics of simple structure, beautiful appearance, flexible configuration and convenient maintenance. All parts should be galvanized. If the bridge is installed outside the building in the open air, if it is near the sea or belongs to the corrosion area, the material must have the physical characteristics of anti-corrosion, moisture resistance, good adhesion and high impact strength.

桥架的荷载

Load of bridge

电缆桥架的荷载分为荷载、动荷载和附加荷载。

The load of cable tray is divided into load, dynamic load and additional load.

静荷载是指敷设在电缆桥架内的电缆种类、根数、每根的外径重量／单位长度，按电缆敷设的不同路由分别列表统计。

Static load refers to the type and number of cables laid in the cable tray, and the outer diameter weight / unit length of each cable. It is listed and counted according to different routes of cable laying.

动荷载是指电缆桥架安装和维护过程中施工维修人员的重量。对于轻型电缆桥架，一般不考虑动荷载，即不允许在桥架上站(行）人，如果需要考虑站人，则应将跨距适当缩小。附加荷载仅在室外是指冰雪、风和电磁力所形成的荷载，它与安装场所的地区自然气象条件和带电体的性质有关，设计中应根据各种条件加以计算。

Dynamic load refers to the weight of construction and maintenance personnel during the installation and maintenance of cable tray. For light cable tray, dynamic load is generally not considered, that is, people are not allowed to stand (walk) on the tray. If people need to be considered, the span should be appropriately reduced. The additional load only refers to the load formed by ice, snow, wind and electromagnetic force. It is related to the natural meteorological conditions of the installation site and the nature of the charged body. It shall be calculated according to various conditions in the design.

选用桥架的步骤

To select a bridge

(1)确定桥架宽度、层数、支撑点的型式和间距、以及电缆在各层桥架上的分布。

(1) Determine the bridge width, number of layers, type and spacing of support points, and distribution of cables on each layer of bridge.

(2）计算每层电缆的均布荷载（ｋN/m２)，初步确定桥架的型号、规格。

(2) Calculate the uniformly distributed load (KN / m2) of each layer of cable, and preliminarily determine the model and specification of the bridge.

(3)按大的电缆总均布荷载值来验算桥架强度。验算式如下：

(3) The bridge strength shall be checked and calculated according to the large total uniformly distributed load value of the cable. The checking formula is as follows:

Q使用＝ｑ1+q2

Q use = Q1 + Q2

式中：q１-－电缆的均布荷载（各层的均布荷载中取大值）(kN/

Where: Q1 - uniformly distributed load of the cable (the greater of the uniformly distributed loads of each layer) (KN)/

m2)，均布荷载是托盘、梯架或电缆槽的荷载；

M2), uniformly distributed load is the load of tray, ladder or cable tray;

q2－－考虑电缆敷设或检修时，人的重量等效的均布荷载（kＮ／

Q2 - uniform load (KN /) equivalent to the weight of people during cable laying or maintenance

m2)，q2值的计算，人的重量一般按ｐ＝90kg计。

M2), Q2 value, and the weight of a person is generally calculated as P = 90kg.

表示集中荷载和均布荷载的弯距如图2

Represents the bending distance of concentrated load and uniformly distributed load, as shown in Figure 2

按大弯距相等的条件折算:

Converted according to the condition of equal large bending distance:

令pι/4=ｑ2ι2/8则q2=2p/ι

Let p ι/ 4=ｑ2 ι 2 / 8, then Q2 = 2P/ ι

∵P=90kg

∵P=90kg

∴q２＝180／ι

∴q２＝180／ ι

式中：P--1人的荷载(kg)

Where: P -- load of 1 person (kg)

ι－-１个支撑点间距（若支点间距不等时取大值)（m)

ι－- Spacing of one support point (if the spacing of support points is not equal, the larger value shall be taken) (m)

q2－-1人的等效均布荷载（kｇ/m）

Q2 - equivalent uniformly distributed load of 1 person (kg / M)

根据上述初步确定的桥架型号、规格及支点间距，查阅生产厂家的样本资料，反复核查间距和桥架型号，直至满足负荷要求为止。更多相关内容就来我们网站 //www.comprepyme.com进行咨询了解吧。

According to the above preliminarily determined bridge model, specification and fulcrum spacing, refer to the manufacturer's sample data, and repeatedly check the spacing and bridge model until the load requirements are met. For more information, please visit our website //www.comprepyme.com Consult and understand.