Rebar Image Translation for Concrete Prefabricated Houses
The rebar distribution in concrete prefabricated houses features a complex structure with clear design specifications. Although images cannot be directly provided, key structural features can be described in text. The rebar configuration must meet requirements for structural strength, seismic performance, and lifting/transportation needs, with specific distributions as follows:
1. Stirrup Configuration
6mm-diameter threaded rebar is used as stirrups, evenly spaced along the longitudinal direction of prefabricated components according to design specifications. The primary role of stirrups is to restrain longitudinal rebar, preventing longitudinal buckling under compression while enhancing the component's shear capacity. In load-concentrated areas such as beams and columns, stirrup spacing is reduced; for example, stirrup spacing in window sill beams or roof beams may be narrowed to 100-150mm to improve local shear performance.
2. Corner Rebar Reinforcement
Reinforcing rebar is required at all four corners of prefabricated components, typically using 10-12mm-diameter threaded steel with 135° hooks bent at the ends and securely welded. This design effectively resists stress concentration at component edges, preventing corner damage during transportation or installation due to impacts. For example, corner rebar in prefabricated wall panels extends to the component edges and remains exposed, facilitating welding or sleeve grouting during connection with other components.
3. Full-Wall Rebar Mesh
Walls utilize double-layer bidirectional rebar meshes, with longitudinal and transverse rebar tied or welded into an integrated structure. Rebar diameters generally range from 6-8mm, with spacing determined by component dimensions and load requirements, commonly 150-200mm. This full-coverage design evenly distributes loads, preventing wall cracks. For openings (e.g., doors/windows), diagonal tie bars are added around the perimeter in an "X" pattern to reinforce edges against stress concentration-induced cracking.
4. Top/Bottom Rebar Cage Beams
Prefabricated components feature rebar cage beams at the top and bottom as primary load-bearing frameworks. Beam rebar diameters typically range from 12-16mm, connected to wall rebar via welding or mechanical joints. For example, upper and lower rebar meshes in prefabricated floor slabs are supported by stirrups to maintain spacing, with closed stirrups at ends ensuring no flexural failure occurs under vertical loads.
5. Window Corner Diagonal Tie Bars
Diagonal tie bars (8-10mm diameter) are installed around window openings, welded at intersections with horizontal and vertical rebar. This design significantly enhances crack resistance in window corner areas, preventing 45° diagonal cracks caused by temperature changes or concrete shrinkage. Diagonal tie bars are typically arranged at 45°-60° angles, with spacing adjusted according to window dimensions to ensure continuous stress transfer paths.
6. Lifting Ring Configuration
20mm round steel lifting rings are required for prefabricated components during transportation. These rings are symmetrically positioned at the component top, welded or anchored into concrete with anchorage lengths meeting design specifications (e.g., ≥30x ring diameter). Lifting capacity must be verified through calculations to safely support component self-weight and dynamic load factors.
