1. Concept of Axial Force
In construction, axial force refers to the tensile or compressive force exerted on a component along its axis by internal forces. It can also be called tension or compression. In steel bracing, axial force refers to the sum of the compressive and tensile forces exerted on the component by shear forces. It is a key factor affecting the bearing capacity and stability of steel braces.
2. Standard Values of Axial Forces in Steel Braces
During the design and construction of steel braces, axial forces must be controlled to ensure safe bearing capacity and a sound structure. The standard value of axial force in steel braces refers to the load capacity and applied load under ultimate load conditions calculated using a certain safety factor under different design scenarios. It is an important indicator for measuring the safety performance of steel braces.
3. Concept of Preloaded Axial Force
During use, steel braces may experience axial deformation and stress changes due to various factors, such as temperature fluctuations and load variations. To ensure long-term operational stability after construction, a certain amount of axial tension, known as preloaded axial force, is applied to the steel braces during construction.
Preloaded axial force is adjusted based on actual conditions during construction. Its magnitude is determined by practical conditions and project requirements, and should be kept within a certain range to ensure it does not affect the subsequent safe operation of the steel support.
IV. The Difference Between Standard Axial Force and Preloaded Axial Force
Although both standard axial force and preloaded axial force refer to the axial force of steel supports, their functions and meanings differ. The standard axial force of a steel support is a fixed value, an important indicator for reference during design and construction. Its value determines the safety and load-bearing capacity of the steel support. Preloaded axial force, on the other hand, is an axial tension added during construction based on actual conditions. It is intended to adjust the stress state of the steel support and ensure its long-term stability.
In summary, both standard axial force and preloaded axial force refer to the axial force of steel supports, but they have different functions and meanings. During the design, construction, and operation of steel supports, the axial force of the steel supports must be properly controlled and adjusted to ensure their safety and stability.
