In addition to the structural arrangement of the frame-shear wall structure, the arrangement of the frame and the shear wall should also meet the following requirements:
The frame-shear wall structure should be designed as a two-way anti-side force system, and hinges should not be used between the main structural members. In seismic design, shear walls should be arranged in both main axis directions. The center line of the beam and column or the column and the shear wall should coincide, and the eccentric distance between the beam and the center line of the frame should not be greater than 1/4 of the column width.
The layout of the shear wall in the frame-shear wall structure is generally arranged according to the principle of "uniform, symmetrical, dispersed and peripheral":
â‘ The shear wall should be evenly and symmetrically arranged near the periphery of the building, the elevator room, the plane shape change and the part with large dead load; it is not appropriate to set the shear wall on both sides of the expansion joint, settlement joint and seismic joint.
â‘¡ When the unevenness of the plane shape is large, the shear wall should be arranged near the end of the protruding part.
â‘¢ When the shear wall is arranged, if the shear wall cannot be set in one direction in the longitudinal or horizontal direction due to the use of the building, the side force members such as wall frames or supports can be used in this direction. However, the horizontal force is applied in both directions. The displacement value should be close. The seismic rating of the wall frame should be considered according to the seismic rating of the shear wall.
â‘£ The layout of the shear wall should be evenly distributed, the rigidity of the single-piece wall should be close, and the long-length shear wall should be equipped with openings and connecting beams to form a double-limb wall or a multi-limb wall, and a single-limb wall or a multi-limb wall. The length should not be greater than 8 m. The shear force generated by the horizontal force at the bottom of each section of shear wall should not exceed 40% of the total shear force at the bottom of the structure.
⑤ The longitudinal shear wall should be arranged in the middle section of the structural unit. When the longitudinal length of the house is long, it should not be concentrated at both ends to arrange longitudinal shear walls. Otherwise, post-construction pouring tape should be set in the appropriate part of the plane to reduce the impact of shrinkage stress during the concrete hardening process. The impact.
â‘¥ When continuous floors are opened in staircases and shafts, shear walls should be installed at the sides of the holes, and they should be combined with the adjacent lateral resistance structures as much as possible. It should not be isolated in the middle of the single lateral resistance structure or column net. section.
⑦ The spacing of the shear walls should not be too large, and should meet the requirements of floor plane rigidity, otherwise the influence of floor plane deformation should be considered.
3. The shear wall in the frame-shear wall structure should be designed as a framed shear wall with beams (or dark beams) around it. Vertical and horizontal adjacent shear walls should be connected together to form L shape, T shape and mouth shape, etc., in order to increase the rigidity and torsion resistance of the shear wall.
4. In a long rectangular plane or a building with a long plane, the arrangement of shear walls should meet the following requirements:
â‘ The spacing of the transverse shear walls along the long direction should meet the requirements of Table 4-18. When the floor between these shear walls has a large opening, the spacing of the shear walls should be reduced.
â‘¡ Longitudinal shear walls should not be arranged at both ends.
5. The shear wall should pass through the full height of the building, and the thickness along the height wall should be gradually thinned to avoid sudden changes in stiffness. When the shear wall cannot be fully penetrated, the reduction of the stiffness of adjacent floors should not be greater than 30%. On the floor slab with abrupt stiffness, the structural measures should be strengthened according to the requirements of the conversion floor slab.
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