Shear wall is also called wind resistance wall or earthquake wall. Its main function is to withstand horizontal load caused by wind load or earthquake action in house construction to prevent structural shear damage. Built with reinforced concrete and cast-in-place reinforced concrete. Frame-shear wall structure is also called frame-shear structure. This structure is to arrange a certain number of shear walls in the frame structure to form a flexible and free use space to meet the requirements of different building functions. There are also enough shear walls , With considerable rigidity, the stress characteristics of the frame-shear structure is a new form of force composed of two different lateral force-resisting structures of the frame and the shear wall structure, so its frame is different from the pure frame structure. The frame and shear wall are also different from the shear wall in the shear wall structure in the frame shear structure. Because, on the lower floor, the displacement of the shear wall is small, it deforms according to the curved curve by pulling the frame, the shear wall bears most of the horizontal force, and the upper floor is opposite, the displacement of the shear wall is getting larger and larger, there are outside Trend, while the frame has a tendency to retract. The frame tensile shear wall deforms according to the shear curve. In addition to the horizontal force generated by the external load, the frame also bears the additional horizontal force that pulls the shear back. The wall not only does not bear the horizontal force generated by the load, but also bears the negative shear force because of an additional horizontal force to the frame. Therefore, even if the floor shear force generated by the external load on the upper floor is small, a considerable shear force appears in the frame. The shear wall structure is to replace the beam and column in the frame structure with a reinforced concrete wall panel, which can bear the internal forces caused by various loads and can effectively control the horizontal force of the structure. The reinforced concrete wall panel can bear vertical and horizontal forces. It has great rigidity and good space integrity. There are no exposed beams and column angles in the room, which is convenient for indoor layout and convenient use. The shear wall structure is the most widely used structure in high-rise residential buildings. Therefore, it is not necessary for home buyers to be blinded by their professional terms. Frame-shear wall structure is also called frame-shear structure. This structure is to arrange a certain number of shear walls in the frame structure to form a flexible and free use space to meet different needs. The requirements of the building function and the stress characteristics of the frame-shear structure are new stress forms composed of two different lateral force-resistant structures, the frame and the shear wall structure, so its frame is different from the frame in the pure frame structure. The shear wall is also different from the shear wall in the shear wall structure in the frame shear structure. The frame-shear wall structure is a structure in which an appropriate shear wall is set in the frame structure. It has the advantages of flexible layout of the frame structure plane, a larger space, and the advantage of greater lateral rigidity. In the frame-shear wall structure, the shear wall mainly bears the horizontal load, and the vertical load is borne by the frame. The structure is generally suitable for buildings with 10-20 floors. (1) Good integrity; (2) The lateral rigidity is large, and the lateral displacement is small under the action of horizontal force; (3) Since there are no exposed or protruding beams, columns, etc., it is convenient for the interior layout of the room. (1) Cannot provide large space houses; (2) Poor ductility. Principle 1. 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. Principle 2: 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": (1) 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 . (2) When the unevenness of the plane shape is large, it is advisable to arrange the shear wall near the end of the protruding part. (3) 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 needs of the building, the wall frame or brace can be used in this direction, but the horizontal force acts in both directions The displacement value under should be close. The seismic rating of the wall frame should be considered according to the seismic rating of the shear wall. (4) 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. The length of the wall limbs 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. (6) When continuous floors are opened by 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. The middle part. (7) The spacing of 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. Principle 3. The shear wall in the frame-shear wall structure should be designed as a framed shear wall with beam columns (or dark beam columns) 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. Principle 4. In a long rectangular plane or a building with a long plane, the arrangement of shear walls should meet the following requirements: (1) When there is a large opening in the floor between the shear walls, the spacing of the shear walls should be reduced. (2) Longitudinal shear walls should not be arranged at both ends. Principle 5. The shear wall should penetrate the full height of the building, and the thickness of the wall along the height should be gradually thinned to avoid sudden changes in rigidity. 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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