What is the frame shear structure
Frame shear wall structure is also called frame-shear structure. Literally, a certain number of shear walls are arranged in the frame structure to form a flexible and free use space. The force characteristics are two different types of frame and shear wall structures. The force-bearing form composed of the anti-side force structure, the interaction force between the frame and the shear wall makes the whole frame shear wall structure more stable.
Building characteristics of frame-shear structure
The force characteristic of the frame-shear structure is a new force-bearing structure composed of two different lateral force-resistant structures of the frame and the shear wall structure, so its frame is different from the frame in the pure frame, and the shear wall is in the frame-shear structure The middle is also different from the shear wall in the pure shear wall structure, because the displacement of the shear wall in the lower floor is small, it pulls the frame to deform according to the curved curve, the shear wall bears most of the horizontal force, and the upper floor is the opposite , The displacement of the shear wall is getting larger and larger, and there is a trend toward the outside, while the frame has a tendency to retract.
The frame tension shear wall deforms according to the shear curve. In addition to the horizontal force generated by the load, the frame also bears additional burden The additional horizontal force that pulls the shear wall back. The shear wall not only does not bear the horizontal force generated by the load, but also bears the negative shear force due to an additional horizontal force to the frame, so the upper floor even if the external load generates a small floor shear force , There is considerable shear force in the frame. The shear wall in the frame shear wall structure can be set up separately, or it can use walls such as elevator shafts, stairwells, and pipe shafts.
Main features of frame shear structure
The frame-shear wall structure is called the frame-shear structure. It is a combination of frame structure and shear wall structure. It absorbs their respective strengths. It can not only provide a larger space for the architectural layout, but also Good lateral force resistance. The shear wall in the frame-shear structure can be set separately, or use walls such as elevator shafts, stairwells, and pipe shafts. Therefore, this structure has been widely used in various housing constructions.
The deformation of the frame-shear structure is a shear-bending type. As we all know, the deformation of the frame structure is shear type, with relatively small deformation between the upper layers and large deformation between the lower layers. The deformation of the shear wall structure is curved, with relatively large deformation between the upper layers and small deformation between the lower layers. For the frame-shear structure, due to the coordinated deformation of the two structures, the bending-shearing deformation is formed, which reduces the relative displacement ratio between the layers and the vertex displacement ratio of the knotting and improves the lateral stiffness of the structure.
The horizontal load is mainly borne by the shear wall. From the perspective of the force characteristics, since the lateral stiffness of the shear wall in the frame-shear structure is much greater than that of the frame, under the action of horizontal loads, in general, more than 80% of the shear wall is used to bear. Therefore, the floor shear force distributed by the frame structure under the horizontal load is evenly distributed along the height, and the bending moments of the beams and columns of each layer are relatively close, which is beneficial to reduce the beam and column specifications and facilitate construction.