Connection structure of steel ladder support and reinforced concrete bottom plate
By adopting a symmetrical shear key design in the connection structure between the steel ladder support and the reinforced concrete base slab, the problem of single-point force concentration is solved, and the shear force is dispersed and transferred through two paths, thereby improving shear resistance and durability. This design is suitable for large-span steel ladder structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR THIRD ENG BUREAU GRP (ZHEJIANG) CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-21
AI Technical Summary
In the existing connection structure between the steel ladder support and the reinforced concrete base slab, the single shear key located in the center leads to stress concentration, which can easily cause local concrete crushing or weld cracking. It is also prone to torsion under asymmetrical stress and requires a large size to affect the passage of longitudinal reinforcement.
Two centrally symmetrical shear keys are used, which are connected by butt steel plates and anchor rods to achieve dual-path transmission of horizontal shear force. The shear keys abut against the two ends of the limiting groove to balance the difference in shear force generated by bending moment, forming a dual energy dissipation mechanism.
It effectively disperses shear force, enhances shear resistance, improves durability, avoids excessive local stress, is suitable for large-span steel staircase structures, does not affect the passage of longitudinal reinforcement, and improves energy dissipation capacity.
Smart Images
Figure CN224532088U_ABST