Jul. 07, 2020
Which three aspects need to be considered in steel structure design? Need to
consider the strength and stiffness stability of the steel structure!
So do you understand what is strength, what is stiffness, what is stability? As a Steel Structure Accessories Factory, share with you. Let us first understand the three most basic aspects! Let's talk about the aspects of steel structure design that need to be considered!
Custom Steel Structures Workshop
Strength guarantees that the material is permanently deformed and broken. The ability of metal materials to resist permanent deformation and fracture under the action of external forces is called strength. According to the different properties of external force, there are mainly yield strength, tensile strength, compressive strength, flexural strength, etc. Commonly used in engineering are yield strength and tensile strength. These two strength indicators can be measured by tensile tests.
Strength refers to the ability of the material to withstand external forces without being damaged (unrecoverable deformation is also destroyed). According to the type of force, it is divided into the following types:
(1) Compressive strength-the ability of the material to withstand pressure.
(2) Tensile strength-the ability of the material to withstand the tensile force.
(3) Bending strength-the ability of the material to withstand the bending force.
(4) Shear strength-the ability of the material to withstand the shear force.
The stiffness guarantees that the elastic deformation of the material does not exceed a certain range. Stiffness refers to the ability of a part to resist elastic deformation under load. The stiffness (or rigidity) of a part is usually expressed by the force or moment required for unit deformation. The size of the stiffness depends on the geometry and material type of the part (ie, the elastic modulus of the material). Stiffness requirements are especially important for certain parts that will affect the working quality of the machine after the amount of elastic deformation exceeds a certain value, such as the main shaft, guide rails, and screw of the machine tool.
Stability is to ensure that the pressure bar does not bend suddenly. There are many types of automatic control systems, and the functions they perform are also very different. Some are used to control temperature changes, while others have to track the flight path of the aircraft. But all systems have a common feature to work properly, which is to meet the stability requirements.
After understanding the strength, stiffness and stability, let's take a look at the choice of building column pitch, the choice of length and width, the determination of a reasonable span, and the support layout.
Column pitch selection
The technical and economic comparison shows that the most economical column under the standard load is 8~9m. When it exceeds 9m, the steel consumption of the roof purlin and wall frame system increases too much, and the overall cost is not economical. The standard load here refers to: roof live load 0.3KN/m2, basic wind pressure 0.5KN/m2, when the load is greater, the economic column distance should be reduced accordingly. For factories with more than 10 tons of traffic, the economic distance should be 6~7m.
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