[Teach you a trick] Steel structure professional terminology-Shenyang Century Weiye Steel Structure Co., Ltd

[Teach you a trick] Steel structure professional terminology

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2015-05-10

　　I. Steel Structure Terminology

　　1. Strength: The ability of a component's cross-section material or connection to resist destruction. Strength calculation is the calculation to prevent the destruction of structural components or connections due to exceeding material strength.

　　2. Load-carrying capacity: The maximum internal force that a structure or component can withstand without being destroyed due to factors such as strength, stability, or fatigue; or the maximum internal force when a plastic analysis forms a failure mechanism; or the internal force when deformation reaches a point unsuitable for continued loading.

　　3. Brittle fracture: Generally refers to the sudden brittle fracture of a steel structure under tensile stress without any warning plastic deformation.

　　4. Standard value of strength: The yield point (yield strength) or tensile strength of steel as stipulated in national standards.

　　5. Design value of strength: The numerical value obtained by dividing the standard value of strength of steel or connection by the corresponding partial safety factor for resistance.

　　6. First-order elastic analysis: Without considering the influence of the second-order deformation of the structure on internal forces, the equilibrium conditions are established based on the undeformed structure, and the internal forces and displacements of the structure are analyzed in the elastic stage.

　　7. Second-order elastic analysis: Considering the influence of the second-order deformation of the structure on internal forces, the equilibrium conditions are established based on the deformed structure, and the internal forces and displacements of the structure are analyzed in the elastic stage.

　　8. Buckling: Under the action of axial pressure, bending moment, shear force alone or together, a member or plate suddenly undergoes a large deformation inconsistent with the original stress state and loses stability.

　　9. Post-buckling strength of web: The ability of the web to continue to withstand loads after buckling.

　　10. General high thickness ratio: A parameter whose value is equal to the square root of the quotient of the bending, shear, or compressive yield strength of steel divided by the corresponding elastic buckling stress of the web plate in bending, shear, or local bearing.

　　11. Overall stability: Under external load, the evaluation of whether the entire structure or component will buckle or

　　become unstable.

　　12. Effective width: The width used in calculating the strength and stability of the cross-section. The effective

　　13. Effective width coefficient: The ratio of the effective width of the plate to the actual width of the plate.

　　14. Effective length: The equivalent length obtained by multiplying the geometric length of the component between its effective constraints by a coefficient considering the end deformation and loading conditions of the rod, used to calculate the slenderness ratio of the component. The weld length used when calculating the strength of welded joints.

　　15. Slenderness ratio: The ratio of the effective length of the component to the radius of gyration of the component's cross-section.

　　16. Equivalent slenderness ratio: In the overall stability calculation of axially compressed members, the slenderness ratio corresponding to the calculation of lattice members as solid web members according to the principle of equal critical force, or the slenderness ratio used when converting bending-torsion and torsional instability to bending instability.

　　17. Support force: The lateral support provided to reduce the free length of the compressed member (or the compressed flange of the member). The lateral force required to be applied to the cross-section shear center of the supported member (or the compressed flange of the member) in the buckling direction of the supported member (or the compressed flange of the member).

　　18. Unstiffened pure frame: A frame that relies on the bending resistance of components and node connections to resist lateral loads.

　　19. Stiffened frame: In a braced frame, the lateral stiffness of the bracing structure (bracing truss, shear wall, elevator shaft, etc.) is relatively large, and the frame can be considered as a frame without lateral displacement.

　　20. Unstiffened frame: In a braced frame, the lateral stiffness of the bracing structure is weak, and the frame cannot be considered as a frame without lateral displacement.

　　21. Sway column: A column in a frame that is hinged at both ends and cannot resist lateral loads.

　　22. Column web node zone: The area of the column web within the height range of the beam at the rigid connection node of the frame beam and column.

　　23. Spherical steel bearing: A spherical steel surface that allows the structure to rotate in any direction at the bearing, used as a hinged or movable bearing for transferring forces.

　　24. Rubber bearing: A composite material product made of rubber and thin steel plates, etc., that meets the displacement requirements of the bearing and acts as a bearing for transferring bearing reaction forces.

　　25. Main pipe: In steel pipe structural components, pipe fittings that continuously pass through nodes, such as chord members in trusses.

　　26. Branch pipe: In steel pipe structures, pipe fittings that are disconnected at the nodes and connected to the main pipe, such as the web members connected to the main pipe in trusses.

　　27. Gap node: A pipe node where the toes of two branch pipes are separated by a certain distance.

　　28. Overlapping node: A node where two branch pipes overlap at the steel pipe node.

　　29. Planar pipe node: A node where the branch pipe and the main pipe are connected in the same plane.

　　30. Spatial pipe node: A pipe node formed by connecting branch pipes and main pipes in different planes.

　　31. Composite member: A member composed of more than one steel plate (or steel section) connected together, such as I-section or box-section composite beams or columns.

　　32. Steel and concrete composite beam: A beam composed of a concrete wing plate and a steel beam connected by shear connectors, capable of carrying loads as a whole.