An assembled building component with friction energy dissipation and self-resetting functions

Abstract

An assembled building component with friction energy dissipation and self - resetting functions, including a building component (1), characterized in that: the building component (1) has four or more outer sides, and two opposite outer sides are respectively set as a first topological interlocking surface (2) and a second topological interlocking surface (3), and the remaining outer sides are planes (4). The topological interlocking surface is a surface formed by double - rail sweeping of a group of curves that are centrosymmetric about the center point of the cross - section of the topological interlocking surface. Between two adjacent building components (1), non - adhesive cooperation can be carried out through the first topological interlocking surface (2) and the second topological interlocking surface (3). The structure of the present invention is reasonable, and the assembly and alignment are convenient and fast. The topological interlocking surface can limit the relative dislocation of components at the connection interface, improving the shear resistance of the assembled building component after installation. At the same time, under the action of the topological interlocking surface, the assembled building component has a very excellent self - resetting function.

Description

Technical Field

[0001] The present invention relates to a building component, and particularly to a prefabricated building component with friction energy dissipation and self - resetting functions, belonging to the technical field of civil engineering. Background Art

[0002] In recent years, prefabricated building components have been increasingly used in the fields of civil engineering, road and bridge engineering, etc. It has many outstanding advantages, can realize factory - prefabricated production, and can achieve automation and intelligentization in the production process, with good economic and environmental benefits. In the field of civil engineering, prefabricated shear walls, prefabricated beam structures, prefabricated column structures, and concrete blocks are representatives of prefabricated building components. In the field of road and bridge engineering, precast beams are representatives of prefabricated building components.

[0003] Existing prefabricated building components are all connected and fixed by methods such as post - installed rebar, steel bar welding, and grouting. The assembly connection parts are rigidly connected by in - situ casting. After connection and fixation, an integral structure is formed. For the structure made of prefabricated building components, the seismic bearing capacity at the beam - column joint position has a very important impact on the seismic performance of the entire structure. During an earthquake, many assembly connection parts are extremely prone to damage. Once damaged, they cannot self - reset, which is not conducive to the safety of the building structure.

[0004] More importantly, the assembly connection surface of existing prefabricated building components is usually a "one - size - fits - all" planar structure, and such a planar structure has poor rotational ability. When subjected to extreme loads and generating large swings, large rotational deformations will occur at the connection. For a flat joint with poor rotational ability, it is difficult to dissipate this part of energy through friction. On the contrary, large stress concentrations will be generated, making the connection parts of the components prone to local damage. In addition, the shear resistance of the flat joint is relatively poor. The shear force on the beam - column contact surface is mainly borne by prestressed tendons and energy - dissipating steel bars, while the concrete component itself does not provide any effect. This is because the friction force provided on the contact surface is very small, and the seismic and self - resetting abilities are poor and cannot withstand earthquake damage. The above - mentioned technical problems have always been technical difficulties restricting the development of prefabrication technology. There has always been a lack of a prefabricated building component with a reasonable structure, convenient installation, and having friction energy dissipation and self - resetting functions to solve the above - mentioned technical problems. Summary of the Invention

[0005] The object of the present invention is to address the long-standing problems of traditional prefabricated building components, namely, high assembly difficulty, high requirement for alignment accuracy, and poor seismic performance. Such components are extremely prone to damage during earthquakes and lack the functions of friction energy dissipation and self-centering. The present invention provides a prefabricated building component with a reasonable structure, convenient and fast assembly alignment, good friction energy dissipation and self-centering effects, which ingeniously solves the technical problems existing in traditional prefabricated building components and has good seismic performance.

[0006] To achieve the above object, the technical solution of the present invention is: a prefabricated building component with friction energy dissipation and self-centering functions, including a building component. The building component has four or more outer sides, and two opposite outer sides are respectively set as a first topological interlocking surface and a second topological interlocking surface, and the remaining outer sides are planes. The topological interlocking surface is a surface formed by double-track sweeping of a group of curves that are centrosymmetric about the center point of the cross-section of the topological interlocking surface. Adjacent building components can be non-bondingly fitted through the first topological interlocking surface and the second topological interlocking surface and can form topological interlocking. The surfaces of the first topological interlocking surface and the second topological interlocking surface are smooth, and adjacent building components can perform a certain relative sliding after being assembled through the topological interlocking surface.

[0007] Further, the first topological interlocking surface and the second topological interlocking surface are respectively composed of four trigonometric function curves. The long side is a cosine function with one period, and the short side is a cosine function with half a period. The topological interlocking surface is formed by sweeping the short side on the long side.

[0008] Further, the first topological interlocking surface and the second topological interlocking surface are determined by the following equations:

[0009]

[0010] where h is the height of the topological interlocking surface in the z direction, b is the unit length of the topological interlocking surface in the x direction, and l is the unit length of the topological interlocking surface in the y direction.

[0011] Further, in the surface equation:

[0012]

[0013] θ(y) = θ(-y);

[0014] θ(y) = θ(y + l);

[0015] θ(0) = 1;

[0016]

[0017] θ′(0) = θ′(0) = 0.

[0018] Further, the building component is a precast concrete beam, a precast concrete column, a precast concrete slab or other precast concrete members, and may also be a building component made of steel structure or a building component made by sintering.

[0019] Further, the building component is made by sintering, precast concrete or machining.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention adopts a topologically interlocking surface as the assembly connection surface, and no longer uses the grouting and in-situ casting method of bonding and fixing. The assembly connection surface adopts a non-bonding fixing method of direct assembly and fitting. There is an interlocking function between the two topologically interlocking surfaces assembled together. Under the action of external forces, it can undergo a certain degree of small displacement and can achieve friction energy dissipation, greatly reducing the stress and fundamentally avoiding structural damage caused by earthquakes or external forces.

[0022] 2. The topologically interlocking surface of the present invention can limit the relative dislocation of components at the connection interface, improving the shear resistance of assembled building components after installation. At the same time, under the action of the topologically interlocking surface, the assembled building components have a very excellent self-resetting function and can automatically reset after an earthquake.

[0023] 3. The assembled building component with topologically interlocking function adopted by the present invention can effectively limit the movement in the horizontal direction by using the topologically interlocking structure on the component, greatly reducing the dependence on the alignment accuracy of the component, reducing the use of mortar, improving the construction efficiency, and fundamentally avoiding the decline of building performance caused by poor masonry skills of workers, which is more in line with the concept of assembled building and industrialized construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 is Figure 1 a schematic side view of

[0026] Figure 3 is Figure 1 a top view of

[0027] Figure 4 is Figure 1 a schematic front view of

[0028] Figure 5 is a displacement-load curve diagram of the present invention.

[0029] Figure 6It is the force-displacement curve diagram of the present invention.

[0030] Figure 7 It is the stress nephogram of the present invention.

[0031] In the figure: building component 1, first topological interlocking surface 2, second topological interlocking surface 3, plane 4, center line of the surface 5. Specific embodiments

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] See Figures 1 to 7 , an assembled building component with friction energy dissipation and self-resetting functions of the present invention, including building component 1, characterized in that: the building component 1 has four or more outer sides, and two opposite outer sides are respectively set as the first topological interlocking surface 2 and the second topological interlocking surface 3, and the remaining outer sides are planes 4. The topological interlocking surface is a surface formed by double-track sweeping of a group of curves that are centrosymmetric about the center point of the cross-section of the topological interlocking surface. Between adjacent building components 1, non-bonding cooperation can be carried out through the first topological interlocking surface 2 and the second topological interlocking surface 3, and topological interlocking can be formed. The surfaces of the first topological interlocking surface 2 and the second topological interlocking surface 3 are smooth, and a certain relative sliding can be carried out after adjacent building components 1 are assembled through the topological interlocking surface.

[0034] The first topological interlocking surface 2 and the second topological interlocking surface 3 are respectively composed of four sections of trigonometric function curves. The long side is a cosine function with one period, and the short side is a cosine function with half a period. The topological interlocking surface is formed by sweeping the short side on the long side.

[0035] The first topological interlocking surface 2 and the second topological interlocking surface 3 are determined by the following equations:

[0036]

[0037] Among them, h is the height of the topological interlocking surface in the z direction, b is the unit length of the topological interlocking surface in the x direction, and l is the unit length of the topological interlocking surface in the y direction.

[0038] In the surface equation:

[0039]

[0040] θ(y) = θ(-y);

[0041] θ(y) = θ(y + l);

[0042] θ(0) = 1;

[0043]

[0044] θ′(0) = θ′(0) = 0.

[0045] The building component 1 is made by sintering, precasting with concrete or machining.

[0046] See Figures 1 to 5 , instead of using traditional mortar bonding, the present invention adopts topological interlocking surfaces as the assembly connection surfaces, and no longer uses the grouting in-situ bonding and fixing method. The assembly connection surfaces adopt a non-bonding fixing method of direct assembly and fitting, which has unique structural advantages and performance advantages in assembly docking and earthquake resistance, and can achieve good earthquake energy dissipation and self-resetting effects.

[0047] The building component 1 of the present invention has four or more outer sides. Two of the multiple outer sides and the opposite outer sides are respectively set as topological interlocking surfaces, namely the first topological interlocking surface 2 and the second topological interlocking surface 3, and the remaining outer sides are planes 4. Between two adjacent building components 1, non-bonding cooperation can be carried out through the first topological interlocking surface 2 and the second topological interlocking surface 3, and topological interlocking can be formed. The topological interlocking surface is formed by double-track sweeping with a group of curves that are centrosymmetric about the center point of the shear wall section. The equation of the curve is a sine curve with one or more periods. The curve is a NURBS curve, and the curve after double-track sweeping is a NURBS surface. When drawing, the shape of the surface can be accurately controlled by adding control points, which is convenient for designing the surface in different projects. At the same time, the NURBS surface is convenient for conversion in different engineering software, so that the surface can be imported into different engineering software for modeling and calculation.

[0048] The present invention conducts experiments and calculations on topological interlocking surfaces of different shapes, and finally obtains that the mechanical properties, friction energy dissipation and self-resetting effects of the surface determined by the following equation are the best. The equation is as follows:

[0049]

[0050] Where h is the height of the topological interlocking surface in the z direction, b is the unit length of the topological interlocking surface in the x direction, and l is the unit length of the topological interlocking surface in the y direction.

[0051] In order to verify the unique technical effects brought by the topological interlocking surface of the present invention, the displacement-load curves of topological interlocking nodes and ordinary nodes with the same size under cyclic loading are attached Figure 6 as shown.

[0052] By comparing the load-displacement curves of ordinary nodes and topologically interlocked nodes under unidirectional loads, it can be seen that: the tangent slope of the curve of the topologically interlocked surface is larger in the early stage, and the shear strength is higher; by comparing the hysteresis curves of ordinary bricks and topologically interlocked bricks under cyclic loads, it can be seen that compared with ordinary nodes, the topologically interlocked nodes: the area enclosed by the curve of the topologically interlocked nodes is larger, and the energy dissipation capacity is better.

[0053] See Appendix Figure 6 and Appendix Figure 7 , and the curves from bottom to top are the horizontal forces of the bricks with a one-way displacement of 10 mm when the surface heights are 15 mm, 20 mm, 25 mm, 30 mm, and 35 mm respectively. The acting point is at the side coupling point of the middle brick. When the surface height is 15 mm, 20 mm, and 25 mm, the curves tend to be stable. When the surface height is 30 mm and 35 mm, although the force-displacement curves are generally stable, there are large local fluctuations.

[0054] Since the topologically interlocked surface is uneven, there is an obvious stress concentration phenomenon in the plane when a lateral displacement is applied, and this phenomenon is particularly obvious at the convex parts of the cross-section. The maximum stresses in each cross-section are shown in the following table:

[0055]

[0056] From the data in the table, it can be seen that the stress gradually decreases as the cross-section height increases. When h = 15 mm, 20 mm, and 25 mm, the changes in stress are more obvious. When h = 25 mm, 30 mm, and 35 mm, the changes in stress tend to be stable and the difference is very small. In summary, combining the force-displacement curve and the maximum in-plane stress, the topologically interlocked surface with a surface height of 25 mm is initially determined to be the most suitable surface.

[0057] The topologically interlocked surface of the present invention enables a small sliding displacement to occur during an earthquake and can achieve friction energy dissipation. Using a smooth topologically interlocked surface can make the components have a larger contact area during the deformation process of the structure, reduce stress concentration, avoid damage to the components during an earthquake, and at the same time, under the action of the topologically interlocked surface, the prefabricated building components have a very excellent self-centering function and can automatically return to their original positions after an earthquake.

[0058] The above content is a further detailed description of the present invention in combination with specific embodiments. It cannot be considered that the specific embodiments of the present invention are only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, simple modifications and substitutions made should be regarded as belonging to the protection scope of the present invention.

Claims

1. An assembled building component with friction energy dissipation and self - reset function, comprising a building component (1), characterized in that: The building component (1) has more than four outer side surfaces, among which two opposite outer side surfaces are respectively set as a first topological interlocking surface (2) and a second topological interlocking surface (3), and the remaining outer side surfaces are planes (4). The topological interlocking surface is a surface formed by double-rail sweeping of a group of curves that are centrosymmetric about the center point of the cross-section of the topological interlocking surface. Between two adjacent building components (1), non-bonding fit can be carried out through the first topological interlocking surface (2) and the second topological interlocking surface (3), and topological interlocking can be formed. The surfaces of the first topological interlocking surface (2) and the second topological interlocking surface (3) are smooth. After the two adjacent building components (1) are assembled through the topological interlocking surfaces, a certain relative sliding can be carried out. The first topological interlocking surface (2) and the second topological interlocking surface (3) are respectively composed of four sections of trigonometric function curves. The long side is a cosine function of one period, and the short side is a cosine function of half a period. The topological interlocking surface is formed by the short side sweeping on the long side. The first topological interlocking surface (2) and the second topological interlocking surface (3) are determined by the following equations: Among them, h is the height of the topological interlocking surface in the z direction, b is the unit length of the topological interlocking surface in the x direction, and l is the unit length of the topological interlocking surface in the y direction.

2. The prefabricated building component with friction energy dissipation and self-resetting function according to claim 1, characterized in that: The building component (1) is a precast concrete beam, a precast concrete column, a precast concrete slab or other precast concrete members, or a building component made of steel structure or a building component made by sintering.

3. The prefabricated building component with friction energy dissipation and self-resetting function according to claim 1, wherein: The building component (1) is made by sintering, precast concrete or machining.

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