ROCKING SELF-CENTERING SEISMIC AND VIBRATION PREVENTION STRUCTURE FACILITATING OVERALL REGULATION

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] The present application claims the priority to the Chinese patent application with the filing No. 202411445707.3, entitled “ROCKING SELF-CENTERING SEISMIC AND VIBRATION PREVENTION STRUCTURE FACILITATING OVERALL REGULATION” and filed on October 16, 2024 with the Chinese Patent Office, the contents of which are incorporated herein by reference in their entirety.

TECHNICAL FIELD

[0002] The present application relates to the technical field of recoverable-function seismic prevention structural systems, and particularly to a rocking self-centering seismic and vibration prevention structure facilitating overall regulation.

BACKGROUND ART

[0003] Recoverable-function seismic prevention structural systems have been a research hotspot in earthquake engineering field in recent years. The design objective of these structural systems is to ensure that buildings may maintain an acceptable functional level when an earthquake occurs and recover their service functions after the earthquake without complex repairs or with only minor repairs. The proposal of this design concept is based on enhancing the anti-seismic resilience of urban buildings and infrastructure, thereby reducing the economic losses and social impacts caused by earthquake disasters.

[0004] Current design concepts for building structures to cope with earthquake actions primarily include: anti-seismic resilience design, performance-based anti-seismic design, seismic isolation and energy dissipation and seismic reduction technologies, anti-seismic design of non-structural components, structural optimization design, and etc. The development and application of these design concepts aim to improve the safety and functionality of building structures under earthquake actions and reduce losses caused by earthquake disasters. Rocking self-centering structures may effectively control residual displacement after an earthquake, ensuring the functionality and safety of the structure. Due to the easy repair and rapid construction, rocking self-centering structures have greater economic significance and social value. Due to the rocking effect, the ductility design requirements of the structure itself are reduced, which may save structural costs. Rocking self-centering structures may be applied to different structural systems, such as rocking bridge piers, reinforced concrete frame structures, steel frame structures, shear wall structures, etc. Although rocking self-centering structures have significant advantages in anti-seismic performance and rapid recovery after earthquakes, they also face some challenges and problems in practical applications. The design of rocking self-centering structures needs to consider multiple factors, including the stability, strength of the structure, and the behavior under different earthquake intensities, which increases the complexity of the design; and secondly, in order to ensure that the structure may self-center after rocking, special materials and technologies are usually required, such as post-tensioned prestressed tendons, which may increase the difficulty and cost of construction.

[0005] In summary, it is an issue that urgently needs to be solved by those skilled in the art to improve the anti-seismic resilience and recovery ability of building structures through scientific research and technological innovation, and to provide a structure which has a simple design, may rock stably during earthquakes and has small residual deformation after earthquakes.

SUMMARY

[0006] The present application provides a rocking self-centering seismic and vibration prevention structure facilitating overall regulation, which reduces structural damage under strong seismic motions, has a small residual structural deformation after seismic motion, and is conducive to the rapid recovery of the service functions of the structure.

[0007] In order to solve the above technical problems, the present application adopts the following technical solutions.

[0008] A rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application includes an upper structure, a support mounting layer, and a foundation, where the support mounting layer is provided with an inner vertical member at the position of the plane centroid of the upper structure, and edge vertical members are arranged at intervals at the periphery of the upper structure in the contour direction thereof; the inner vertical members each have an upper end connected to the upper structure, and a lower end connected to the foundation via a rotational hinge support; and the vertical tension-compression supports are mounted at the edge vertical members;

[0009] where the rotational hinge support allows the upper structure to generate rotational displacement and simultaneously limit the translational displacement of the upper structure in the horizontal direction; and

[0010] where the vertical tension-compression supports do not constrain the lateral displacement of the upper structure, only provide compressive bearing capacity, and do not bear shear bearing capacity in the horizontal direction.

[0011] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, the upper structure may be designed as a traditional building structure including columns, beams, and walls, members, or a specific structure composed of vertical bending-compression members, where the specific structure is a water tower, a signal tower, a power line tower, or an industrial or military building.

[0012]For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, the lateral displacement caused by the rigid body rotational displacement of the upper structure under the earthquake action is 30%-80% of the overall lateral displacement of the upper structure.

[0013] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, the vertical tension-compression support is a spiral tension-compression support, a disc spring support, a thick rubber support or an air spring support; and when performing the plane design of the support mounting layer, multiple vertical tension-compression supports of the same type or multiple types of vertical tension-compression supports may be selected and combined.

[0014] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, the vertical tension-compression supports are equipped with limiting devices, where the limiting devices each include a compression limiter and a tension limiter, "inverted T"-shaped mounting grooves are provided at the mounting positions of the vertical tension-compression supports, and the vertical tension-compression supports are mounted in the mounting grooves, the compression limiters are mounted at the top parts of the vertical tension-compression supports and are located above the mounting grooves, where when the vertical tension-compression supports reach the compression limit, the compression limiters contact the top parts of the mounting grooves; and the tension limiters are mounted at the lower parts of the vertical tension-compression supports and are located in the expanded spaces at the lower parts of the mounting grooves, where when the vertical tension-compression supports reach the compression limit, the tension limiters contact the top walls of the mounting grooves.

[0015] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, the vertical tension-compression supports are mounted in the middle of the support mounting layer, and the upper parts and lower parts of the vertical tension-compression supports are respectively connected with edge vertical members, the edge vertical members at the upper parts are connected to the upper structure, and the edge vertical members at the lower parts are connected to the foundation.

[0016] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, when the vertical tension-compression supports are provided on the top part of the support mounting layer, the upper parts of the vertical tension-compression supports are connected to the vertical members of the bottom layer of the upper structure, and the lower parts are connected to the foundation through the edge vertical members.

[0017] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, the vertical tension-compression supports are provided at the bottom part of the support mounting layer, the vertical tension-compression supports and the rotational hinge support are located at the same height, and the vertical tension-compression supports each have the upper part connected to the upper structure through the edge vertical member, and the lower part connected to the foundation.

[0018] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, lateral constraints are provided at the connection positions of the vertical tension-compression supports and the foundation.

[0019] For the rocking self-centering seismic and vibration prevention structure facilitating overall regulation of the present application, further, energy dissipation and seismic reduction device(s) is vertically mounted at the support mounting layer, and the energy dissipation and seismic reduction device(s) deforms synchronously with the vertical tension-compression supports.

[0020] Compared with the prior art, the present application has the following beneficial effects.

[0021] The present application provides a rocking self-centering seismic and vibration prevention structure facilitating overall regulation, where different from the traditional horizontal shear seismic isolation principle, the upper structure generates a rigid body rotation around the rotational hinge support, which allows the upper structure to rock as a whole within the range allowed by the design, and the energy is absorbed and dispersed through the deformation of the vertical tension-compression supports and the energy dissipation devices; this structural system is particularly suitable for structures with greater rigidity because it can adapt to the deformation requirements of the structure under extreme loads, meanwhile it reduces dependence on the ductility design of general building structures; this structural system may effectively combine anti-seismic and seismic dissipation technologies, providing new seismic dissipation design ideas for reducing damage and destruction under strong earthquake action, and thus possesses innovation and practicality; and due to the strong structural stability and strong self-centering ability, it can effectively control the residual displacement after the earthquake, and has great economic significance and social value.

[0022] The present application will be further described below with reference to the drawings.

BRIEF DESCRIPTION OF DRAWINGS

[0023]FIG. 1 is a schematic view showing three mounting positions of the vertical tension-compression supports of a rocking self-centering seismic and vibration prevention structure facilitating overall regulation according to the present application;

[0024]FIG. 2 is a schematic front view of a rocking self-centering seismic and vibration prevention structure facilitating overall regulation provided by the present application;

[0025]FIG. 3 is a schematic top view of the rocking self-centering seismic and vibration prevention structure facilitating overall regulation in FIG. 2;

[0026]FIG. 4 is a schematic view showing the deformation of the rocking self-centering seismic and vibration prevention structure facilitating overall regulation in FIG. 2 under the action of horizontal seismic force simulated in finite element software;

[0027]FIG. 5 shows the proportion situations of the overall structural drift ratio and the rigid body rotational drift ratio of the rocking self-centering seismic and vibration prevention structure facilitating overall regulation in FIG. 2, under seismic forces of different levels (major earthquake, moderate earthquake, and minor earthquake), from which the movement characteristics of the structure under earthquake action may be intuitively understood; and

[0028]FIG. 6 is a schematic view showing mounting of the limiting device of the rocking self-centering seismic and vibration prevention structure facilitating overall regulation provided by the present application.

Reference numerals

[0029]1. upper structure; 2. support mounting layer; 3. foundation; 4. rotational hinge support; 5. vertical tension-compression support; 6. compression limiter; 7. tension limiter; 8. mounting groove; 21. inner vertical member; 22. edge vertical member; and 23. diagonal brace.

DETAILED DESCRIPTION OF EMBODIMENTS

[0030]As shown in FIGS. 1-6, the present application discloses a rocking self-centering seismic and vibration prevention structure facilitating overall regulation, including an upper structure 1, a support mounting layer 2, and a foundation 3, where the upper structure 1 may be designed as a traditional building structure including columns, beams, walls and other members, or a specific structure composed of vertical bending-compression members, such as a water tower, a signal tower, a power line tower, or an industrial or military building, etc. Through proper design, the lateral displacement of the upper structure 1 caused by rigid body rotational displacement under earthquake action should not be less than 30%, generally 30%-80%, of the overall lateral displacement of the upper structure 1, and for the upper structure 1, the rigidity of the upper structure 1 may be enhanced by providing supports, increasing cross-sectional dimensions, and other means.

[0031] The support mounting layer 2 is provided with an inner vertical member 21, edge vertical members 22, and diagonal braces 23, where the inner vertical member 21 is arranged at a position near the plane centroid of the upper structure 1, and has the upper end connected to the upper structure 1, and the lower end connected to the foundation 3 via a rotational hinge support 4; and edge vertical members 22 are arranged at intervals at the periphery of the upper structure 1 in the contour direction of the upper structure 1. The diagonal braces 23 are located at the support mounting layer 2, and connected between the top parts of the edge vertical members 22 and the rotational hinge support 4.

[0032] The rotational hinge support 4 allows generation of rotational displacement and simultaneously limit the translational displacement of the upper structure 1 connected thereto in the horizontal direction, so that the upper structure 1 generates a rigid body rotation around the rotational hinge support 4 under the action of seismic force, ensuring that the structure may be stably restored after rocking.

[0033] The vertical tension-compression supports 5 do not constrain the lateral displacement of the upper structure 1, and only provide compressive bearing capacity, and do not bear any shear bearing capacity in the horizontal direction.

[0034] The vertical tension-compression supports 5 may be spiral tension-compression supports, disc spring supports, thick rubber supports, air spring supports, etc. When performing the plane design of the support mounting layer 2, multiple vertical tension-compression supports 5 of the same type or different types of vertical tension-compression supports 5 may be selected and combined.

[0035] The vertical tension-compression supports 5 are equipped with limiting devices, where the limiting device includes a compression limiter 6 and a tension limiter 7, "inverted T"-shaped mounting grooves 8 are provided at the mounting positions of the vertical tension-compression supports 5, the vertical tension-compression support 5 is mounted in the mounting groove 8, the compression limiters 6 are mounted at the top parts of the vertical tension-compression supports 5 and are located above the mounting grooves 8, where when the vertical tension-compression supports 5 reach the compression limit, the compression limiters 6 contact the top part of the mounting grooves 8; and the tension limiters 7 are mounted at the lower parts of the vertical tension-compression supports 5 and are located in the expanded spaces at the lower parts of the mounting grooves 8, and when the vertical tension-compression supports 5 reach the compression limit, the tension limiters 7 contact the top walls of the mounting grooves 8, and when the tensile deformations or compressive deformations of the vertical tension-compression supports 5 reach the design limit, the tensile rigidity or compressive rigidity of the vertical tension-compression supports 5 may increase significantly to prevent the upper structure from overturning.

Example 1

[0036] The vertical tension-compression supports 5 are mounted in the middle of the support mounting layer 2, the upper ends and lower ends of the vertical tension-compression supports 5 are respectively connected to the edge vertical members 22, the edge vertical members 22 located at the upper parts are connected to the upper structure 1, and the edge vertical members 22 located at the lower parts are connected to the foundation 3.

Example 2

[0037] The differences from Example 1 lie in that: the vertical tension-compression supports 5 are provided on the top part of the support mounting layer 2, the upper parts of the vertical tension-compression supports 5 are directly connected to the vertical members of the bottom layer of the upper structure 1, and the lower parts are connected to the foundation 3 through the edge vertical members 22.

Example 3

[0038] The differences from Example 1 and Example 2 lie in that: the vertical tension-compression supports 5 are provided at the bottom part of the support mounting layer 2, the vertical tension-compression supports 5 and the rotational hinge support 4 are located at the same height, the upper parts of the vertical tension-compression supports 5 are connected to the upper structure 1 through the edge vertical members 22, and the lower parts are directly connected to the foundation 3.

[0039] In addition, it may be designed to add lateral constraints at the connection positions of the vertical tension-compression supports 5 and the foundation 3, where the lateral constraint may be the inner wall of the mounting groove, enabling it to resist shear force in the horizontal direction while bearing vertical tension and compression force.

Example 4

[0040] Energy dissipation and seismic reduction device(s) may be provided at the support mounting layer 2, where the energy dissipation and seismic reduction device(s) are vertically mounted at the support mounting layer 2, and the type of energy dissipation and seismic reduction device includes viscous damper, viscoelastic damper, etc., and the energy is absorbed and dispersed through the deformation of the energy dissipation and seismic reduction device(s) and the vertical tension-compression supports 5.

Example 5

[0041]The finite element calculation results of the rocking self-centering seismic/vibration prevention structure are provided to predict its effect under earthquake action. In this example, the upper structure 1 is a 9-story steel frame structure with 2 spans and 3 bays, the fortification intensity is 8 degrees (0.2g), the site category is Class Ⅲ, Group 2, the site characteristic period is 0.55 s, the floor dead load is 5kN/m², and the live load is 2kN/m².

[0042] The embodiments described above are merely description of preferred implementations of the present application and are not intended to limit the scope of the present application. Without departing from the spirit of the present application, various modifications and improvements made to the technical solutions of the present application by the person ordinarily skilled in the art should fall within the scope of protection determined by the claims of the present application.