An assembled multi-directional rocking self-centering tube structure system

Abstract

The present invention is an assembled multi-directional rocking self-centering cylindrical structure system, including a main structure. The main structure is laterally connected to a cylindrical structure through a number of connecting members. A self-centering tension structure is provided at the center or periphery of the cylindrical structure. One end of the self-centering tension structure is tensioned at the top of the cylindrical structure and vertically hangs down along the cylindrical structure, and the other end is cast into the in-situ foundation below it. The bottom of the cylindrical structure is connected to the in-situ foundation through a multi-directional rocking joint. The structural system of the present invention has the advantages of good seismic performance, simple structure, high industrialization level, short construction period, etc.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake-resistant structural systems for civil engineering, and particularly relates to an assembled multi-directional rocking self-centering tube structure system. Background Art

[0002] China is one of the regions in the world with frequent earthquake disasters. Large earthquakes such as those in Tangshan and Wenchuan have caused huge losses to the lives and property of the Chinese people. Actively responding to earthquake disasters and reducing the threat of earthquake disasters to social security are important tasks in building the urban and rural earthquake prevention and disaster reduction systems in China. Improving the seismic performance of civil engineering structures has always been a basic element for ensuring urban and rural seismic safety. With the rapid development of related disciplinary technologies, measures for improving the seismic performance of structures have evolved from the "seismic" technology of simply increasing structural stiffness to the "seismic isolation" of isolating ground vibrations and the "seismic damping" of increasing the dissipation of input energy by adding auxiliary devices, and have been greatly promoted in engineering applications in recent years. In recent years, the concept of "resilient cities and towns" has received wide attention. How to enable structures to quickly recover their functions after an earthquake is extremely crucial, and the research on "function-recoverable" structural systems has developed, thus forming new structural systems such as "self-centering structures" and "rocking structures".

[0003] General rocking structures and self-centering structures refer to relaxing the constraints between the structure and the foundation or between components, so that there is only compressive capacity but no tensile capacity at the contact surface between the structure and the foundation or between components. Then, the structure rocks under earthquake action and is reset by its own weight or prestress. Based on this concept, some rocking and self-centering structural systems have been developed successively, such as: self-centering ball-inserted winged rocking seismic isolation piers (CN104278620A), self-centering shear walls with replaceable coupling beams (CN203626080U), reinforced concrete rocking walls, rocking wall assemblies and their manufacturing methods (CN101851965B), a reinforced concrete rocking wall assembly with sleeve connection (CN104631616A), an assembled self-centering rocking steel plate wall structure system (CN106401018B), an assembled rocking self-centering steel bracing structure system (CN106382041B), a function-recoverable composite plate shear wall (CN203640084U), etc. However, most of these systems are planar or linear walls and components. When considering multi-directional earthquake actions, their out-of-plane performance needs to be restricted by other construction measures, which brings great difficulties to practical engineering applications.

[0004] In recent years, the prefabricated building industry has developed vigorously, driving the research and development of related technologies, such as a fully prefabricated frame steel bracing structure (CN203334474U), an assembled composite steel plate shear wall (CN204983239U), an assembled double-layer steel plate concrete-filled composite shear wall structure system (CN204983269U), etc. However, none of these have self-centering functions. With the advancement of industrialization research, the concept of self-centering has also been introduced into precast shear walls, such as a prefabricated assembled self-centering shear wall structure (CN204876196U), etc. At the same time, with the development of urban renewal work, the demand for installing elevators in a large number of old residential areas has brought certain safety challenges to structural reinforcement design. The existing technologies only utilize the mechanical use functions of the elevator installation part, and relatively little consideration is given to its contribution to the structural functions under seismic action.

[0005] Therefore, fully considering the out-of-plane stability and safety issues of the rocking wall, introducing the concept of assembled structure, and providing an assembled multi-directional rocking self-centering tube structure system that integrates the concepts of multi-directional rocking structure, self-centering, and energy dissipation and seismic reduction. At the same time, when used for installing elevators in old campuses, the structural functions of the elevator installation part can be fully utilized to improve the seismic performance of existing buildings. This system can provide new ideas for the design of rocking structure systems for new buildings and existing buildings, and also provide new concepts for the consideration of structural functions in the installation of elevators in old residential areas during urban renewal. Summary of the Invention

[0006] The purpose of the present invention is to overcome the problems existing in the prior art that it is difficult to design the out-of-plane structure of the rocking wall and the functions cannot be synchronized, and to provide an assembled multi-directional rocking self-centering tube structure system. Through multi-directional rocking joints, the functions of the rocking wall are extended from one-way to multi-directional, which not only gives full play to the rocking performance of the rocking structure to achieve energy dissipation and self-centering capabilities under strong earthquakes, but also realizes the industrialized construction method of factory processing and on-site splicing of the rocking structure, providing a new multi-directional rocking structure system for the seismic system of new buildings and the reinforcement and renovation of existing buildings.

[0007] To achieve the above technical purposes and reach the above technical effects, the present invention is realized through the following technical solutions:

[0008] An assembled multi-directional rocking self-centering tube structure system includes a main structure. The main structure is laterally connected to a tube structure through a number of connecting members. A self-centering tension structure is provided at the center or periphery of the tube structure. One end of the self-centering tension structure is tensioned at the top of the tube structure and hangs vertically along the vertical direction of the tube structure, and the other end is cast into the cast-in-place foundation below it. The bottom of the tube structure is connected to the cast-in-place foundation through multi-directional rocking joints.

[0009] Further, the cylindrical structure is composed of steel columns, steel beams, steel braces, steel beam joints and self-centering cables. Between several sections of the steel columns are vertically connected together through steel column joints, and at both ends of each section of the steel column are horizontally provided with extended sections. The extended sections of the steel columns are connected to the horizontally arranged steel beams through steel beam joints. Between the steel beams and the steel columns are connected with steel braces through support joints. The self-centering cable serves as a self-centering pulling structure, and one end thereof is tensioned and anchored at the top of the steel column.

[0010] Further, energy dissipation elements are arranged on the self-centering cable in a uniformly bidirectional manner along its vertical direction for dissipating seismic energy.

[0011] Further, the steel beam joints and the support joints are connected by bolts, and the steel column joints are connected by welding, so as to facilitate factory production and on-site assembly.

[0012] Further, the multi-directional rocking joint is composed of a connecting brace, a stiffening box body and steel anchor bolts. The lower end of the connecting brace is connected to the stiffening box body, and the upper end is connected to the bottom of the cylindrical structure. The upper half of the steel anchor bolts is fixedly connected to the stiffening box body through corresponding nuts, and the lower half is inserted into a reserved hole in the cast-in-place foundation.

[0013] Further, the stiffening box body is composed of vertical trusses and horizontal trusses. A plurality of the vertical trusses are spliced to form the side surface of the box body, and several layers of horizontal trusses are horizontally connected inside the vertical trusses to form the box body structure. At the bottom edge position of the stiffening box body is provided with a chamfered arc, and a rubber pad is provided at the chamfered arc for protection.

[0014] Further, the reserved hole in the cast-in-place foundation is a reverse cup-shaped hole, so that after the lower half of the steel anchor bolt is inserted, there is a certain gap between the bottom cup edge of the reverse cup-shaped hole, so that the stiffening box body has a certain rotational freedom and at the same time provides a certain shear resistance.

[0015] Further, the connecting member includes a sliding connecting piece and a force-transmitting connecting piece. The sliding connecting piece is composed of two steel pipes with different diameters and a cushion block. The small-diameter steel pipe slides into the inner side of the large-diameter steel pipe, and a cushion block is arranged between the outer pipe surface of the small-diameter steel pipe and the inner pipe surface of the large-diameter steel pipe. The small-diameter steel pipe and the large-diameter steel pipe are respectively connected to the cylindrical structure and the main structure. The force-transmitting connecting piece connects the main structure and the cylindrical structure at both ends thereof in an energy dissipation connection manner.

[0016] The beneficial effects of the present invention are:

[0017] The structural system of the present invention can dissipate energy through the relative deformation between the swaying cylinder structure and the main structure when an earthquake occurs, and use energy dissipation components to improve the damage mode of the main frame; after the earthquake, the structure can return to its original state through self-centering cables and maintain its service function; the splicing parts of the system can be bolted, enabling factory production and on-site assembly, shortening the on-site construction period; and it has the advantages of good seismic performance, simple structure, high industrialization level, and good construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic elevational structure diagram of the present invention;

[0019] Figure 2 is a schematic elevational structure diagram of another side of the present invention with a door;

[0020] Figure 3a is a schematic front view structure diagram of the multi-directional swaying joint of the present invention;

[0021] Figure 3b is a schematic top view structure diagram of the multi-directional swaying joint of the present invention;

[0022] Figure 3c is a schematic front view structure diagram of the stiffening box in the multi-directional swaying joint of the present invention;

[0023] Figure 3d is a schematic top view structure diagram of the stiffening box in the multi-directional swaying joint of the present invention;

[0024] Figure 4a is a schematic side view structure diagram of the sliding connector of the present invention;

[0025] Figure 4b is a schematic axonometric view structure diagram of the sliding connector of the present invention

[0026] Figure 5 is another embodiment of the cylinder structure configuration of the present invention.

[0027] Explanation of the reference numerals in the drawings: 1. Main structure; 2. Cylinder structure; 21. Steel column; 22. Steel beam; 23. Steel brace; 24. Steel beam joint; 25. Self-centering cable; 3. Sliding connector; 31. Steel pipe; 32. Cushion block; 4. Force transfer connector; 5. Energy dissipation component; 6. Multi-directional swaying joint; 61. Connecting diagonal brace; 62. Stiffening box; 63. Steel anchor bolt; 64. Vertical truss; 65. Horizontal truss; 66. Rubber pad; 7. Retaining wall; 8. Cast-in-place foundation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0029] As Figure 1As shown, an assembled multi-directional rocking self-centering cylinder structure system includes a main structure 1. The main structure 1 is laterally connected to a cylinder structure 2 through a number of connecting members. A self-centering pulling structure is provided at the center or periphery of the cylinder structure 2. In this embodiment, a self-centering pulling structure is provided at the periphery of the cylinder structure 2. One end of the self-centering pulling structure is tensioned at the top of the cylinder structure 2 and vertically hangs down along the cylinder structure 2, and the other end is cast into the in-situ foundation 8 below it. The bottom of the cylinder structure 2 is connected to the in-situ foundation 8 through a multi-directional rocking joint 6.

[0030] As Figure 2 and Figure 5 shown, the cylinder structure 2 is composed of steel columns 21, steel beams 22, steel braces 23, steel beam joints 24, and self-centering cables 25. In this embodiment, the steel columns 21, steel beams 22, and steel braces 23 are of H-shaped cross-section or I-shaped cross-section, and other applicable steel member cross-section types can also be used. A number of the steel columns 21 are vertically connected together through steel column joints, and extended sections are provided horizontally at both ends of each steel column 21. The extended sections of the steel columns 21 are connected to the horizontally arranged steel beams 22 through steel beam joints 24. A steel brace 23 is connected between the steel beam 22 and the steel column 21 through a support joint. In Figure 2 this embodiment, the steel brace 23 is a rod-shaped structure. In Figure 5 another embodiment, the steel brace 23 is a mesh structure. The self-centering cable 25 serves as the self-centering pulling structure, and one end of it is tensioned and anchored at the top of the steel column 21.

[0031] Energy dissipation elements 5 are arranged on the self-centering cable 25 in a uniformly bidirectional manner along its vertical direction for dissipating seismic energy. In this embodiment, the self-centering cable 25 can be made of high-strength steel strands with tensioned prestress, or metal cable materials with self-centering ability such as shape memory alloys.

[0032] The steel beam joints 24 and support joints are connected by bolts, and the steel column joints are connected by welding to facilitate factory production and on-site assembly.

[0033] As Figure 3a and Figure 3b shown, the multi-directional rocking joint 6 is composed of a connecting brace 61, a stiffening box 62, and steel anchor bolts 63. The lower end of the connecting brace 61 is connected to the stiffening box 62, and the upper end is connected to the bottom of the cylinder structure 2 through an end plate flange. The upper half of the steel anchor bolts 63 is fixedly connected to the stiffening box 62 through corresponding nuts, and the lower half is inserted into the reserved holes of the in-situ foundation 8.

[0034] As Figure 3c and Figure 3dAs shown, the stiffening box 62 is composed of vertical trusses 64 and transverse trusses 65. Several vertical trusses 64 are spliced ​​together to form the side of the box. Several layers of transverse trusses 65 are laterally connected to the inner side of the vertical trusses 64 to form a box structure. A chamfered arc is provided at the bottom edge of the stiffening box 62, and a rubber pad 66 is provided at the chamfered arc for protection.

[0035] The reserved hole of the cast-in-place foundation 8 is an inverted cup-shaped hole, so that after the lower half of the steel anchor bolt 63 is inserted, there is a certain gap with the bottom cup edge of the inverted cup-shaped hole, so that the stiffening box 62 has a certain degree of rotational freedom and provides a certain shear resistance. In this embodiment, a retaining wall 7 is also cast on the side of the cast-in-place foundation 8.

[0036] The connecting member includes a sliding connection member 3 and a force transmission connection member 4. Figure 4a and Figure 4b As shown, the sliding connector 3 is composed of two steel pipes 31 of different diameters and a cushion block 32. The small-diameter steel pipe 31 slides into the inner side of the large-diameter steel pipe 31, and a cushion block 32 is arranged between the outer tube surface of the small-diameter steel pipe 31 and the inner tube surface of the large-diameter steel pipe 31. The small-diameter steel pipe 31 and the large-diameter steel pipe 31 are respectively connected to the cylinder structure 2 and the main structure 1. The sliding connector 3 is used to set a walkway on the middle platform of the stairs when setting up the elevator. The force transmission connector 4 connects the main structure 1 and the cylinder structure 2 at both ends thereof in an energy-dissipating connection manner. In this embodiment, the energy-dissipating connection manner of the force transmission connector 4 can adopt a soft steel energy-dissipating connection, or a viscoelastic or friction energy-dissipating connection form, and its two ends are respectively hinged on the main structure 1 and the cylinder structure 2.

[0037] The processing and on-site assembly process of the present invention is as follows:

[0038] (1) According to the design and construction requirements, the steel columns 21, steel beams 22, steel supports 23 in the cylinder structure 2, the connecting braces 61 and the stiffening box 62 in the swing node 6 are processed in the factory, wherein the connecting braces 61 and the stiffening box 62 can be connected by bolts or welding;

[0039] (2) The retaining wall 7 and the cast-in-place foundation 8 are cast on site. The lower end of the self-resetting cable 25 and its anchor are also cast in the cast-in-place foundation 8. When conditions permit, the retaining wall 7 and the cast-in-place foundation 8 can be designed as prefabricated components to improve construction efficiency;

[0040] (3) The steel column 21 and the steel beam 22 are welded or bolted on site, and the steel support 23 is connected to the steel beam 22 and the steel column 21 by bolts or welding to form a cylindrical structure 2;

[0041] (4) Hoist the cylinder structure 2 and the multi-directional rocking joint 6, position and install them, insert the steel anchor bolts 63 into the reserved holes of the cast-in-place foundation 8, and install a simple temporary support between the main structure 1 and the cylinder structure 2;

[0042] (5) Subsequently, pass the self-centering cable 25 through the reserved hole to the top of the steel column 21, tension and anchor the cable here, and install the sliding connector 3 and the force transfer connector 4 by welding between the cylinder structure 2 and the main structure 1;

[0043] (6) After the structure installation is completed, remove the temporary support between the main structure 1 and the cylinder structure 2.

[0044] Principle of the present invention

[0045] In the present invention, the rocking member is extended to multiple directions through the multi-directional rocking joint 6, and the rocking cylinder structure 2 is combined with the main structure 1 to form a frame-rocking cylinder structure system. The bottom of the cylinder structure 2 is changed from a fixed connection to a multi-directional rocking joint 6 with planar contact; when an earthquake occurs, the structure deforms, and a relative displacement is generated between the rocking cylinder structure 2 and the main structure 1, and the energy dissipation element 5 dissipates the earthquake energy. Since the bottom of the cylinder structure 2 is provided with a multi-directional rocking joint 6, the cylinder structure 2 rocks as a whole, effectively improving the seismic performance of the main structure 1; after the earthquake, due to the existence of the self-centering cable 25, the overall structure has a high ability to recover to its original position; at the same time, most of the splicing joints can be bolt-connected, endowing the rocking structure with the characteristics of prefabrication and assembly.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An assembled multi-directional rocking self-centering cylinder structure system, comprising a main structure (1), characterized in that, The main structure (1) is laterally connected to the cylinder structure (2) through a number of connecting members. A self-centering tensile structure is provided at the center or periphery of the cylinder structure (2). One end of the self-centering tensile structure is tensioned at the top of the cylinder structure (2) and vertically hangs down along the cylinder structure (2), and the other end is cast into the in-situ foundation (8) below it. The bottom of the cylinder structure (2) is connected to the in-situ foundation (8) through a multi-directional rocking joint (6); The multi-directional rocking joint (6) is composed of a connecting brace (61), a stiffening box (62) and a steel anchor bolt (63). The lower end of the connecting brace (61) is connected to the stiffening box (62), and the upper end is connected to the bottom of the cylinder structure (2). The upper half of the steel anchor bolt (63) is fixedly connected to the stiffening box (62) through corresponding nuts, and the lower half is inserted into the reserved hole of the in-situ foundation (8); The stiffening box (62) is composed of a vertical truss (64) and a horizontal truss (65). A number of the vertical trusses (64) are spliced to form the side of the box, and a number of layers of horizontal trusses (65) are horizontally connected inside the vertical trusses (64) to form a box structure. A chamfered arc is provided at the bottom edge position of the stiffening box (62), and a rubber pad (66) is provided at the chamfered arc for protection; The reserved hole of the in-situ foundation (8) is a reverse cup-shaped hole, so that there is a certain gap between the lower half of the steel anchor bolt (63) inserted into it and the bottom cup edge of the reverse cup-shaped hole, so that the stiffening box (62) has a certain degree of rotational freedom and at the same time provides a certain shear resistance.

2. The prefabricated multi-directional rocking self-centering cylinder structure system according to claim 1, wherein The cylinder structure (2) is composed of steel columns (21), steel beams (22), steel supports (23), steel beam joints (24) and self-centering cables (25). A number of the steel columns (21) are vertically connected together through steel column joints, and extended sections are provided horizontally at both ends of each steel column (21). The extended sections of the steel columns (21) are connected to the horizontally arranged steel beams (22) through steel beam joints (24). Steel supports (23) are connected between the steel beams (22) and the steel columns (21) through support joints. The self-centering cable (25) serves as a self-centering tensile structure, and one end of it is tensioned and anchored at the top of the steel column (21).

3. The prefabricated multi-directional rocking self-centering cylindrical structure system according to claim 2, wherein Energy dissipation elements (5) are arranged on the self-centering cable (25) in a uniformly bidirectional manner along its vertical direction for dissipating seismic energy.

4. The prefabricated multi-directional rocking self-centering cylinder structure system according to claim 2, characterized in that The steel beam joints (24) and support joints are bolt connection methods, and the steel column joints are welding methods to facilitate factory production and on-site assembly.

5. The assembled multi-directional rocking self-centering cylinder structure system according to claim 1, characterized in that The connecting member includes a sliding connecting piece (3) and a force - transmitting connecting piece (4). The sliding connecting piece (3) consists of two steel pipes (31) with different diameters and a spacer block (32). The small - diameter steel pipe (31) slides into the inner side of the large - diameter steel pipe (31), and a spacer block (32) is arranged between the outer pipe surface of the small - diameter steel pipe (31) and the inner pipe surface of the large - diameter steel pipe (31). The small - diameter steel pipe (31) and the large - diameter steel pipe (31) are respectively connected to the cylinder structure (2) and the main structure (1). The force - transmitting connecting piece (4) connects the main structure (1) and the cylinder structure (2) at both ends in an energy - dissipating connection manner.

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