Practice of horizontal reinforcement of shear wall corner

There are edge members at the corners of shear walls (such as corner walls), and the horizontal distribution bars of the wall should always surround the vertical distribution bars of the edge members and the vertical distribution bars of the wall, and form a reliable closed vertical plane with the stirrups of the edge members. The so-called reliable seal here, including the structure of corner and internal corner, is that the end goes deep into the opposite side and bends 15d.

Extended data:

Plane layout of shear wall:

All vertical loads and horizontal forces in the shear wall structure are borne by the reinforced concrete wall, so the shear wall should be arranged along the plane principal axis.

When the plane is 1, rectangular, L-shaped and T-shaped, the shear wall is arranged along two orthogonal principal axes;

2. Triangular and Y-shaped planes can be arranged in three directions;

3. Regular polygons, circles and arc planes can be arranged in radial and circumferential directions.

The length of a single shear wall should not be too large. For the shear wall with long length, the structural period is too short and the seismic force is too large, which is uneconomical.

Shear walls can only have enough ductility when they work in bending, so shear walls should be high and thin. If the shear wall is too long, it will form a low-width shear wall, which is prone to shear failure and brittle, which is not conducive to earthquake resistance.

Therefore, when the continuous shear wall on the same axis is too long, the floor slab or small coupling beam should be divided into several wall sections, and the height-width ratio of each wall section should not be less than 2. Each wall segment can be a single wall, a small opening wall or a joined wall.

The width of each wall limb should not be greater than 8m, so as to ensure that the wall limb is controlled by bending bearing capacity and give full play to the role of vertical distribution bars. When calculating the internal force, the floor slab or weak coupling beam between wall segments is not considered, and each wall segment is calculated as an independent shear wall.

Baidu encyclopedia-shear wall

Baidu Encyclopedia-Code for Design of Concrete Structures