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

[Teach you a trick] Steel structure professional terms

Add time：

2017-01-04

　　1. Strength: The ability of a member's cross-section material or connection to resist failure. Strength calculation is used to prevent the failure of structural members or connections due to exceeding material strength.

　　2. Load-carrying capacity: The maximum internal force that a structure or member can withstand without failure due to strength, stability, fatigue, etc.; or the maximum internal force when a failure mechanism is formed by plastic analysis; or the internal force when deformation reaches a state unsuitable for continued load bearing.

　　3. Brittle fracture: Generally refers to the sudden brittle fracture of steel structures 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 by 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: An analysis that does not consider the influence of second-order deformation of the structure on internal forces. It establishes equilibrium conditions based on the undeformed structure and analyzes the internal forces and displacements of the structure in the elastic stage.

　　7. Second-order elastic analysis: An analysis that considers the influence of second-order deformation of the structure on internal forces. It establishes equilibrium conditions based on the deformed structure and analyzes the internal forces and displacements of the structure in the elastic stage.

　　8. Buckling: A sudden large deformation of a member or plate under the action of axial pressure, bending moment, shear force, or their combination, resulting in instability and deviation from the original stress state.

　　9. Strength after web buckling: The ability of the web to continue to bear load after buckling.

　　10. General high thickness ratio: A parameter equal to the square root of the ratio of the yield strength of steel in bending, shear, or compression to the elastic buckling stress of the web plate in bending, shear, or local compression.

　　11. Overall stability: An evaluation of whether the entire structure or member will buckle or become unstable under external loads.

　　12. Effective width: The width used in the calculation of section strength and stability.

　　13. Effective width factor: 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 a member between its effective restraint points by a factor that considers the end deformation and loading conditions of the member. This is used to calculate the slenderness ratio of the member and the weld length when calculating weld connection strength.

　　15. Slenderness ratio: The ratio of the effective length of a member to the radius of gyration of its 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 members based on the principle of equal critical force, or the slenderness ratio used when converting bending-torsional and torsional instability into bending instability.

　　17. Supporting force: The lateral force required to be applied to the cross-section centroid of a member (or the compressed flange of a member) in the buckling direction at the lateral support provided to reduce the free length of a compressed member (or the compressed flange of a member).

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

　　19. Stiffened braced frame: In a braced frame, the lateral stiffness of the bracing structure (bracing truss, shear wall, elevator shaft, etc.) is large, so the frame can be considered as a non-sway frame.

　　20. Weakly braced frame: In a braced frame, the lateral stiffness of the bracing structure is weak, and the frame cannot be considered as a non-sway frame.

　　21. Sway column: A column in a frame with pinned ends at both ends that cannot resist lateral loads.

　　22. Column web panel zone: The area of the column web within the height of the beam at the rigid connection node of the beam-column.

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

　　24. Rubber bearing: A composite material product made of rubber and thin steel plates that meets the displacement requirements of the bearing and serves as a support for transmitting bearing reaction forces.

　　25. Main member: In a steel pipe structure, a pipe member that runs continuously through the node, such as the chord member in a truss.

　　26. Branch member: In a steel pipe structure, a pipe member that is discontinuous at the node and connected to the main member, such as the web member connected to the main member in a truss.

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

　　28. Overlapping node: A node where two branch members overlap in a steel pipe node.

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

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

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

　　32. Steel-concrete composite beam: A beam integrally subjected to load, composed of a concrete flange and a steel beam connected by shear connectors.