A vertical vibration isolation and self-resetting frame combined structure system

Abstract

The application provides a vertical vibration isolation and self-resetting frame combined structure system, and relates to the field of building structure earthquake resistance, which comprises a vertical vibration isolation layer subsystem, which is arranged between a building foundation and a mechanical decoupling cooperative connection mechanism, and comprises a plurality of vertical vibration isolation supports for providing vertical stiffness and damping to isolate the vertical vibration of the building, and a plurality of sets of limiting devices for limiting the horizontal overrun displacement of the structure; a self-resetting frame subsystem, which is arranged on the upper part of the mechanical decoupling cooperative connection mechanism, and is composed of a frame beam, a frame column and prestressed tendons anchored in the beam-column structure, the prestressed tendons comprising transverse steel bars for connecting the frame beam and the frame column and vertical steel bars for connecting the frame column and the mechanical decoupling cooperative connection mechanism; and the mechanical decoupling cooperative connection mechanism, which comprises a first-layer rigid decoupling bottom plate, and the limiting devices are anchored between the building foundation and the first-layer rigid decoupling bottom plate. The application has the effect of improving the horizontal earthquake resistance and post-disaster recovery performance of the building, and simultaneously meeting the vertical vibration requirement.

Description

Technical Field

[0001] This application relates to the field of seismic technology for building structures, and in particular to a structural system combining vertical vibration isolation and self-resetting frames. Background Technology

[0002] Seismic design is the core of building structural engineering. Seismic isolation and self-resetting technologies are important technical means to improve the seismic toughness of buildings at present, and provide new ways to optimize the seismic resistance of structures.

[0003] In existing building structural systems, vertical vibration isolation structures and self-resetting structures are often designed independently. Traditional vertical vibration isolation structures are mainly used to attenuate daily vertical vibrations caused by external loads such as traffic, optimizing building comfort. However, they cannot withstand horizontal seismic forces and lack post-earthquake self-resetting capabilities, resulting in insufficient horizontal seismic performance. In contrast, self-resetting structures can effectively reduce residual inter-story displacement after an earthquake, enabling rapid structural repair and significantly improving the building's horizontal seismic resistance and post-disaster recovery performance. However, they cannot simultaneously address vertical vibration requirements. Summary of the Invention

[0004] In order to overcome the technical problems described in the prior art, this application provides a structural system combining vertical vibration isolation and self-resetting frame.

[0005] The structural system combining vertical vibration isolation and self-resetting frame provided in this application adopts the following technical solution: A structural system combining vertical vibration isolation and self-resetting frame, including The vertical vibration isolation layer subsystem is located between the building foundation and the mechanical decoupling and collaborative connection mechanism. It includes several vertical vibration isolation supports for providing vertical stiffness and damping to isolate the vertical vibration of the building, and multiple sets of limiting devices for restraining the horizontal excessive displacement of the structure. The self-resetting frame subsystem is located on the upper part of the mechanical decoupling and collaborative connection mechanism. It consists of frame beams, frame columns and prestressed tendons anchored in the beam and column structure. The prestressed tendons include horizontal steel bars for connecting the frame beams and frame columns and vertical steel bars for connecting the frame columns and the mechanical decoupling and collaborative connection mechanism. The mechanical decoupling and coordinating connection mechanism includes a first-floor rigid decoupling base plate and a limiting device anchored between the building foundation and the first-floor rigid decoupling base plate.

[0006] Furthermore, the vertical vibration isolation support is embedded in the limiting cavity formed by multiple sets of limiting devices, and the upper and lower ends of the vertical vibration isolation support are integratedly fixed to the first-floor rigid decoupled base plate and the building foundation by pre-embedded anchoring.

[0007] Furthermore, the vertical vibration isolation supports are arranged in a point-to-point array with full coverage, based on the stress nodes of the self-resetting frame subsystem. Each frame column has a unique set of vertical vibration isolation supports directly below its vertical projection.

[0008] Furthermore, the limiting device includes an upper steel plate and a lower steel plate. The lower steel plate is fixedly anchored to the top surface of the building foundation, and the upper steel plate is correspondingly anchored to the bottom surface of the first-floor rigid decoupling base plate. The upper steel plate and the lower steel plate are fitted together to form a bidirectional anti-lateral limiting structure.

[0009] Furthermore, the cross-sections of the upper and lower steel plates are both set as right-angled triangular structures. The upper and lower steel plates are respectively attached to each other by their own vertical right-angled sides to form a vertical surface fitting and limiting structure. The horizontal right-angled sides of the upper and lower steel plates are respectively anchored to the bottom surface of the first-floor rigid decoupling base plate and the top surface of the building foundation.

[0010] Furthermore, the upper end of the vertical steel bar is anchored to the top of the wall limb of the frame column, and the lower end is anchored to the top surface of the rigid decoupling base plate of the first floor. The vertical steel bar is only arranged in the self-resetting frame subsystem area and does not extend into the vertical vibration isolation layer subsystem area. The upper and lower ends of the vertical steel bar are respectively anchored to different structural bases, forming a non-through anchoring structure with partitioned arrangement.

[0011] Furthermore, the vertical vibration isolation support is an adaptive stiffness and damping adjustable support, specifically a disc spring vibration isolation support or a high-damping rubber vibration isolation support.

[0012] Furthermore, the frame beams and frame columns are all cast using high-toughness, damage-resistant concrete.

[0013] Furthermore, the prestressed tendons are made of low-relaxation high-strength steel strands.

[0014] Furthermore, the first-layer rigid decoupling base plate is a homogeneous slab structure cast in one piece, and the stiffness of the first-layer rigid decoupling base plate is uniform and consistent throughout its entire range.

[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention, by setting up an independent first-floor rigid decoupled base plate and coordinating with a non-continuous zonal anchorage structure for vertical reinforcement, completely isolates the upper self-resetting frame subsystem and the lower vertical vibration isolation layer subsystem in terms of structural space and mechanical transmission. The vertical deformation of the lower vertical vibration isolation support is not constrained by the upper self-resetting frame subsystem, and the horizontal reset deformation of the upper self-resetting frame subsystem does not transmit additional internal forces to the vertical vibration isolation layer subsystem. This completely overcomes the technical drawbacks of traditional integrated structures where vertical vibration and horizontal seismic deformation are coupled and their functions cancel each other out, allowing both daily vertical vibration control and post-earthquake horizontal self-resetting performance to be performed independently and efficiently. 2. This invention uses a right-angled triangular cross-section irregular steel plate to replace the traditional rectangular steel plate. It utilizes the vertical right-angled surfaces of the steel plate to form a surface-to-surface contact limiting mechanism, overcoming the technical defects of traditional rectangular steel plate limiting structures such as insufficient stiffness, stress concentration, and susceptibility to vertical deformation. The mechanical advantages of the triangular cross-section enhance the overall lateral strength and stability of the limiting structure. The vertical surface contact limiting can evenly distribute seismic horizontal loads, avoiding steel plate deformation failure caused by localized stress concentration. Simultaneously, it completely eliminates interference between the limiting structure and vertical vibration isolation, ensuring the stable operation of the decoupling mechanism between horizontal limiting and vertical vibration reduction from a structural perspective, significantly improving the system's collaborative working accuracy and seismic durability. 3. This invention relies on a full-coverage point-to-point vertical vibration isolation support arrangement based on the frame column grid. The vertical load and vibration energy transmission path is precise and uniform, which can effectively attenuate external vertical vibrations such as traffic and environmental vibrations, significantly improving the comfort of daily use of the building. At the same time, with the low-relaxation high-strength prestressed tendon non-continuous anchorage structure, it can effectively eliminate residual inter-story deformation of the frame after an earthquake. The structure has little damage and high restoration accuracy, and the building can be quickly restored to its use function without large-scale repairs, greatly improving the seismic toughness and post-disaster repairability of the building structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0018] Attached reference numerals: 1. Building foundation; 2. Vertical vibration isolation support; 3. Frame beam; 4. Frame column; 5. Horizontal reinforcement; 6. Vertical reinforcement; 7. First floor rigid decoupling base plate; 8. Upper steel plate; 9. Lower steel plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] This application discloses a structural system combining vertical vibration isolation and a self-resetting frame. (Refer to...) Figure 1A structural system combining vertical vibration isolation and a self-resetting frame includes, from top to bottom, a self-resetting frame subsystem, a mechanical decoupling and collaborative connection mechanism, and a vertical vibration isolation layer subsystem. The vertical vibration isolation layer subsystem is located above the building foundation 1 and includes several vertical vibration isolation supports 2 for providing vertical stiffness and damping to isolate the building's vertical vibration, and multiple sets of limiting devices for constraining the structure's horizontal excessive displacement. The vertical vibration isolation supports 2 are embedded within a limiting cavity formed by the multiple sets of limiting devices. The mechanical decoupling and collaborative connection mechanism includes a first-floor rigid decoupling base plate 7. The upper and lower ends of the vertical vibration isolation supports 2 are integratedly fixed to the first-floor rigid decoupling base plate 7 and the building foundation 1 by pre-embedded anchorage. The self-resetting frame subsystem consists of frame beams 3, frame columns 4, and prestressed tendons anchored within the beam-column structure. The prestressed tendons include transverse steel bars 5 for connecting the frame beams 3 and the frame columns 4, and vertical steel bars 6 for connecting the frame columns 4 and the mechanical decoupling and collaborative connection mechanism.

[0021] When constructing and laying out the building foundation 1 and the vertical vibration isolation layer subsystem, the overall pouring and curing of the building foundation 1 is completed first. Then, precise lines are laid out on the top surface of the building foundation 1 according to the positions of the frame beams 3 and frame columns 4 in the upper self-resetting frame subsystem. (Refer to...) Figure 1 The vertical vibration isolation bearings 2 of this invention adopt a point-to-point array-style full-coverage arrangement, ensuring that each frame column 4 has a unique set of vertical vibration isolation bearings 2 directly below its vertical projection, thus guaranteeing the accurate and uniform transfer of the upper vertical load to the lower vertical vibration isolation layer subsystem. The vertical vibration isolation bearings 2 are adaptive stiffness-damping adjustable bearings, and disc spring vibration isolation bearings or high-damping rubber vibration isolation bearings can be selected according to the building load and site vibration characteristics. After positioning, multiple sets of limiting devices are symmetrically arranged on the outside of the vertical vibration isolation bearings 2. The limiting devices include an upper steel plate 8 and a lower steel plate 9, wherein the lower steel plate 9 is pre-anchored to the top surface of the building foundation 1, and the upper steel plate 8 is correspondingly anchored to the bottom surface of the first-floor rigid decoupling base plate 7 to be constructed subsequently. In this embodiment, both the upper steel plate 8 and the lower steel plate 9 are right-angled triangular cross-section steel plates. The horizontal right-angled sides of the upper steel plate 8 and the lower steel plate 9 are respectively anchored to the bottom surface of the first-floor rigid decoupling base plate 7 and the top surface of the building foundation 1. The upper steel plate 8 and the lower steel plate 9 abut against each other through their vertical right-angled sides, forming a bidirectional anti-lateral restraint structure with vertical surface contact, thereby achieving rigid constraint on the horizontal displacement of the first-floor base plate. In this embodiment, a small displacement gap is reserved between the upper steel plate 8 and the lower steel plate 9, and the size of this small displacement gap is smaller than the limit horizontal allowable displacement of the vertical vibration isolation support 2. Under conditions of small environmental vibration or slight horizontal disturbance, the small gap can release the small deformation stress of the structure, avoiding additional internal forces generated by the rigid compression of the structure.

[0022] After the vertical vibration isolation support 2 and the limiting device are installed in place, the reinforcement bars of the first-floor slab are tied together as a whole, and the first-floor rigid decoupled slab 7 is formed by a one-time integral casting process. (Refer to...) Figure 1 The first-layer rigid decoupling base plate 7 has no segmented splicing or construction cold joints throughout its entire process. After molding, the first-layer rigid decoupling base plate 7 has uniform stiffness throughout its entire range, forming the mechanical decoupling and cooperative connection mechanism of this invention. As the sole force transmission carrier between the self-resetting frame subsystem and the vertical vibration isolation layer subsystem, the first-layer rigid decoupling base plate 7, together with the matching limiting device, completely separates the mechanical transmission paths of the upper self-resetting frame subsystem and the lower vertical vibration isolation layer subsystem, realizing the kinematic decoupling of vertical vibration and horizontal seismic deformation, ensuring that the two systems work independently and do not interfere with each other.

[0023] After the rigid decoupled base slab 7 on the first floor reaches its design strength, the formwork and reinforcement binding of the upper frame beams 3 and frame columns 4 will commence. (Refer to...) Figure 1 In this invention, both the frame beam 3 and frame column 4 are integrally cast using high-toughness, damage-resistant concrete, enhancing the frame's resistance to reciprocating stress and its deformation adaptability, thus meeting the long-term working requirements of repeated prestressing and resetting. During frame construction, the positioning, embedding, and anchoring of the prestressing tendon components are completed simultaneously. Specifically, the transverse reinforcing bars 5 are positioned at the nodes of the frame beam 3 and frame column 4, achieving elastic constraint at the beam-column nodes; the vertical reinforcing bars 6 employ a non-through, differentiated anchoring structure, with the upper end anchored to the top of the wall corresponding to the frame column 4, and the lower end centrally anchored to the top surface of the first-floor rigid decoupling base slab 7. The vertical reinforcing bars 6 are only arranged within the upper self-resetting frame subsystem area and do not extend into the lower vertical vibration isolation layer subsystem area. Through this partitioned arrangement of upper and lower ends anchored to different structural substrates, a non-through anchoring structure is formed, fundamentally achieving structural decoupling between the upper self-resetting frame subsystem and the lower vertical vibration isolation layer subsystem.

[0024] Reference Figure 1 The prestressing tendons are uniformly made of low-relaxation high-strength steel strands. Based on the structural design's limit for inter-story drift, the prestressing stress of the steel strands is graded and calibrated to ensure that the prestressing tendons remain within their elastic working range under normal structural use and seismic deformation conditions. After tensioning, the anchorage ends are sealed and protected to ensure the long-term stability of the prestressed system and prevent a decrease in restoring performance due to prestress relaxation.

[0025] The implementation principle of the structural system combining vertical vibration isolation and self-resetting frame in this application embodiment is as follows: Under normal building use conditions, external vertical vibrations such as vehicle traffic and equipment operation are transmitted to the rigid decoupled base plate 7 on the first floor through the upper frame. Finally, the vertical vibration attenuation is achieved by the vertical vibration isolation supports 2 arranged in an array at the bottom through stiffness and damping energy dissipation, effectively controlling the vertical vibration response inside the building and improving the building's comfort. At this time, the limiting device remains in a close and ready state, without restricting the normal vertical micro-deformation of the structure.

[0026] Under seismic conditions, when the structure experiences horizontal inter-story displacement, the three columns of the upper frame beam undergo elastic deformation and stretch the prestressing tendons, which store elastic strain energy. After the seismic load dissipates, the elastic recoil force of the prestressing tendons drives the three columns of the frame beam to return to their initial posture, eliminating residual inter-story displacement and achieving self-resetting, low damage, and rapid repair of the structure.

[0027] Meanwhile, the limiting device formed by the upper steel plate 8 and the lower steel plate 9 of the triangular cross section can rigidly constrain the horizontal over-limit displacement of the first-layer rigid decoupling base plate 7, strictly control the shear deformation of the vertical vibration isolation support 2 within the allowable range, and effectively protect the vertical vibration isolation support 2. Relying on the mechanical isolation effect of the first-layer rigid decoupling base plate 7, the vertical deformation of the lower vertical vibration isolation support 2 will not interfere with the reset behavior of the upper self-resetting frame subsystem, and the horizontal reset internal force of the upper self-resetting frame subsystem will not be transmitted downward to the vertical vibration isolation support 2, thus achieving the coordinated, independent and stable operation of the vertical vibration isolation function and the horizontal self-resetting function.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A structural system combining vertical vibration isolation and self-resetting frame, characterized in that, include The vertical vibration isolation layer subsystem is located between the building foundation and the mechanical decoupling and collaborative connection mechanism. It includes several vertical vibration isolation supports for providing vertical stiffness and damping to isolate the vertical vibration of the building, and multiple sets of limiting devices for restraining the horizontal excessive displacement of the structure. The self-resetting frame subsystem is located on the upper part of the mechanical decoupling and collaborative connection mechanism. It consists of frame beams, frame columns and prestressed tendons anchored in the beam and column structure. The prestressed tendons include horizontal steel bars for connecting the frame beams and frame columns and vertical steel bars for connecting the frame columns and the mechanical decoupling and collaborative connection mechanism. The mechanical decoupling and coordinating connection mechanism includes a first-floor rigid decoupling base plate and a limiting device anchored between the building foundation and the first-floor rigid decoupling base plate.

2. The structural system combining vertical vibration isolation and self-resetting frame according to claim 1, characterized in that, The vertical vibration isolation support is embedded in the limiting cavity formed by multiple sets of limiting devices. The upper and lower ends of the vertical vibration isolation support are fixed in an integrated manner with the first-floor rigid decoupled base plate and the building foundation by pre-embedded anchoring.

3. The structural system combining vertical vibration isolation and self-resetting frame according to claim 2, characterized in that, The vertical vibration isolation supports are arranged in a point-to-point array with full coverage, based on the stress nodes of the self-resetting frame subsystem. Each frame column has a unique set of vertical vibration isolation supports directly below its vertical projection.

4. The structural system combining vertical vibration isolation and self-resetting frame according to claim 1, characterized in that, The limiting device includes an upper steel plate and a lower steel plate. The lower steel plate is fixedly anchored to the top surface of the building foundation, and the upper steel plate is correspondingly anchored to the bottom surface of the first-floor rigid decoupling base plate. The upper steel plate and the lower steel plate are fitted together to form a bidirectional anti-lateral limiting structure.

5. The structural system combining vertical vibration isolation and self-resetting frame according to claim 4, characterized in that, The cross-sections of the upper and lower steel plates are both set as right-angled triangular structures. The upper and lower steel plates are respectively attached to each other by their own vertical right-angled sides to form a vertical surface attachment and limiting structure. The horizontal right-angled sides of the upper and lower steel plates are respectively anchored to the bottom surface of the first-floor rigid decoupling base plate and the top surface of the building foundation.

6. The structural system combining vertical vibration isolation and self-resetting frame according to claim 1, characterized in that, The upper end of the vertical steel bar is anchored to the top of the wall limb of the frame column, and the lower end is anchored to the top surface of the rigid decoupling base plate of the first floor. The vertical steel bar is only arranged in the self-resetting frame subsystem area and does not extend into the vertical vibration isolation layer subsystem area. The upper and lower ends of the vertical steel bar are respectively anchored to different structural bases to form a non-through anchoring structure with partitioned arrangement.

7. The structural system combining vertical vibration isolation and self-resetting frame according to claim 1, characterized in that, The vertical vibration isolation support is an adaptive stiffness and damping adjustable support, specifically a disc spring vibration isolation support or a high-damping rubber vibration isolation support.

8. The structural system combining vertical vibration isolation and self-resetting frame according to claim 1, characterized in that, The frame beams and frame columns are all cast using high-toughness, damage-resistant concrete.

9. The structural system combining vertical vibration isolation and self-resetting frame according to claim 1, characterized in that, The prestressed tendons are made of low-relaxation high-strength steel strands.

10. The structural system combining vertical vibration isolation and self-resetting frame according to claim 1, characterized in that, The first-layer rigid decoupling base plate is a homogeneous slab structure cast in one piece, with uniform stiffness throughout its entire range.

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