Combined energy dissipation and vibration reduction medical building frame structure system and its design, construction and application

Abstract

The present application relates to a combined energy dissipation and vibration reduction medical building frame structure system and design, construction and application, comprising: a plurality of longitudinal and transverse intersecting connections to form a plurality of frame grids of transverse beams and longitudinal columns, diagonal direction arranged in the frame grid buckling-restrained brace, and arranged in the frame grid viscous damping component; Wherein the viscous damping component includes an upper and lower connecting piece arranged on the adjacent transverse beam, and the viscous damper parallel to the transverse beam and the two ends are connected with the upper connecting piece and the lower connecting piece. Compared with the prior art, the present application combines the combined energy dissipation and vibration reduction technology scheme of the viscous damper with wall type connection and buckling-restrained brace, greatly improves the seismic performance of the structure, at the same time responds to the requirements of key seismic prevention and building engineering seismic management regulations, ensures that the normal use requirements can be met when the regional seismic protection earthquake occurs, that is, the structure can be used immediately under the medium earthquake, and the seismic toughness of the structure is improved.

Description

Technical Field

[0001] This invention belongs to the field of building structure technology, specifically to the field of engineering structure technology for medical buildings, and relates to a combined energy dissipation and vibration reduction medical building frame structure system, its design, construction method and application. Background Technology

[0002] According to the "Classification Standard for Seismic Design of Building Engineering" (GB50223), most medical buildings need to be considered as key seismic design categories. At the same time, due to the importance of medical buildings, they need to have higher seismic performance requirements. In accordance with the "Regulations on Seismic Management of Construction Projects" (State Council Decree No. 744), newly built hospitals, nursing homes and other buildings located in high-intensity seismic fortification areas and key earthquake monitoring and defense areas should adopt seismic isolation and damping technologies in accordance with relevant national regulations to ensure that they can meet normal use requirements when a seismic fortification earthquake occurs in the region.

[0003] Therefore, it is of great significance to provide a combined energy dissipation and vibration reduction system and design method suitable for medical building frame structures. Summary of the Invention

[0004] The purpose of this invention is to provide a combined energy dissipation and vibration reduction medical building frame structure system, as well as its design, construction method, and application.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A combined energy dissipation and vibration reduction structure includes: multiple transverse beams and longitudinal columns that are interwoven to form multiple frame grids, buckling-restrained braces disposed in the frame grids along the diagonal direction, and viscous damping components disposed in the frame grids.

[0007] The viscous damping assembly includes a connector located on an upper and lower section on adjacent transverse beams, and a viscous damper parallel to the transverse beams and connected at both ends to the upper connector and the lower connector, respectively.

[0008] Furthermore, the buckling restraint support and viscous damping components are respectively disposed within the corresponding horizontally arranged frame grids.

[0009] Furthermore, multiple viscous damping components are arranged sequentially along the longitudinal direction within multiple frame grids; multiple buckling restraint supports are arranged sequentially along the longitudinal direction within multiple frame grids.

[0010] Furthermore, the buckling restraint braces and viscous damping components arranged laterally adjacent to each other are referred to as energy dissipation and damping combinations, and multiple energy dissipation and damping combinations are evenly arranged.

[0011] Furthermore, the buckling-restrained brace is provided with steel node plates at both ends, and is connected to the frame mesh through the steel node plates;

[0012] The steel gusset plate includes a gusset plate located at the corner of the frame grid, embedded parts respectively embedded on the opposite sides of the transverse beam and the longitudinal column, tie bolts located between the embedded parts and penetrating the transverse beam and / or the longitudinal column, and stiffening ribs located on the opposite sides of the gusset plate.

[0013] The embedded parts located on one side of the transverse beam and the longitudinal column are connected to the node plate;

[0014] The extension direction of the stiffening rib is consistent with that of the buckling-restrained brace.

[0015] Furthermore, the connector is a connecting wall adapted to the transverse beam.

[0016] Furthermore, the viscous damper is hinged to anchor bolt seats at both ends, and the bottom of the anchor bolt seats is embedded in the connecting wall.

[0017] As a specific technical solution, the transverse beams and longitudinal columns are concrete beams or reinforced steel beams.

[0018] A design method for a combined energy dissipation and vibration reduction structure includes the following steps:

[0019] S1: Based on the overall design objectives of combined energy dissipation and vibration reduction, assess the total lateral stiffness required by the main structure under frequent earthquakes;

[0020] S2: Determine the lateral stiffness of the buckling-restrained energy dissipation brace based on the total lateral stiffness of the main structure;

[0021] S3: Determine the arrangement scheme of buckling-restrained energy dissipation braces based on their lateral stiffness.

[0022] S4: Calculate whether the lateral stiffness and arrangement of buckling-restrained energy dissipation braces meet the total lateral stiffness of the main structure.

[0023] If not, proceed to steps S2 to S4, and redetermine the lateral stiffness of the buckling-restrained energy dissipation brace in step S2.

[0024] If so, proceed to step S5;

[0025] S5: Determine the seismic reduction targets for the main structure under design earthquake conditions;

[0026] S6: Based on the seismic reduction target of the main structure under the design earthquake, determine the additional damping ratio and quantity of viscous dampers required;

[0027] S7: Determine the arrangement scheme of the viscous dampers based on the additional damping ratio and quantity required by the viscous dampers;

[0028] S8: Calculate whether the additional damping ratio, quantity, and layout scheme of the viscous dampers meet the seismic reduction target of the main structure under the design earthquake.

[0029] If not, proceed to steps S6 to S8, and in step S6, redetermine the additional damping ratio and number of viscous dampers; or proceed to steps S2 to S8, and in step S2, redetermine the lateral stiffness of the buckling-restrained energy dissipation brace.

[0030] If so, proceed to step S9;

[0031] S9: Perform vibration reduction structure verification according to the specifications, and check whether the strength, stability and overall stiffness of the components for frequent earthquakes, design earthquakes and rare earthquakes meet the requirements by fine-tuning buckling restraint energy dissipation braces and viscous dampers.

[0032] If not, proceed to steps S6 to S9, and in step S6, redetermine the additional damping ratio and number of viscous dampers; or proceed to steps S2 to S9, and in step S2, redetermine the lateral stiffness of the buckling-restrained energy dissipation brace.

[0033] If so, then determine the combined energy dissipation and vibration reduction structural scheme.

[0034] A construction method for a combined energy dissipation and vibration reduction structure includes the following steps:

[0035] S1: Pre-fabricated buckling-restrained energy dissipation brace, and the connection structure between the buckling-restrained energy dissipation brace and the frame grid; pre-fabricated viscous damper, and the connection structure between the viscous damper and the transverse beam;

[0036] S2: On-site construction or installation of the main frame structure system, namely horizontal beams and longitudinal columns;

[0037] S3: Transport the fabricated buckling restraint energy dissipation brace, viscous damper and corresponding connecting structure to the construction site and install them on site.

[0038] An application of a combined energy dissipation and vibration reduction structure includes using the combined energy dissipation and vibration reduction structure in medical buildings.

[0039] This invention utilizes elastic time-history analysis of the structure under design intensity and dynamic elastoplastic analysis under rare earthquakes. The results show that the calculated parameters of the structure meet the code requirements under both design and rare earthquakes. Under design earthquakes, the structural beams and columns do not enter a plastic state, thus meeting normal service requirements; that is, it can be used immediately under moderate earthquakes. The structure of this invention exhibits good seismic performance and structural toughness. Furthermore, the wall-connected viscous dampers and buckling-restrained braces can serve as replaceable structural components, forming a recoverable functional structural system.

[0040] Compared with the prior art, the present invention has the following characteristics:

[0041] 1) Buckling-restrained energy dissipation braces can provide a certain lateral stiffness for frame structures under frequent earthquakes and design earthquakes.

[0042] 2) The installation of viscous dampers meets the requirements of the regulations on seismic management of construction projects, which stipulate that new hospitals and other buildings located in high-intensity seismic fortification areas and key earthquake monitoring and defense areas should adopt seismic isolation and vibration reduction technologies.

[0043] 3) The installation of viscous dampers can dissipate energy under design earthquakes and rare earthquakes, provide additional damping ratio to the structure, and significantly reduce the seismic response of the frame structure.

[0044] 4) The application of combined energy dissipation and vibration reduction technology can protect the main frame structure and significantly improve the seismic performance of the structure.

[0045] 5) Medical buildings using this system have a distinct dual seismic fortification system, which greatly improves the seismic toughness of the structure.

[0046] 6) Medical buildings using this system have a simple and applicable design method, which optimizes the structural design process.

[0047] 7) The combined energy dissipation and vibration reduction technology system is easy to install on site, and all of them are dry operation methods, which have good economic and environmental benefits. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of a combined energy dissipation and vibration reduction structure that can be used in medical buildings, as shown in the embodiment.

[0049] Figure 2 Assembly diagram of buckling-restrained brace;

[0050] Figure 3 This is a schematic diagram of the steel node plate assembly.

[0051] Figure 4 A schematic diagram of the assembly of the gusset plate, embedded parts, and tie bolts on the longitudinal column;

[0052] Figure 5 , Figure 6 , Figure 7 This is a schematic diagram of the assembly of a viscous damper;

[0053] Figure 8 A flowchart of a design method for a combined energy dissipation and vibration reduction structure;

[0054] Explanation of markings in the diagram:

[0055] 1-Frame grid, 2-Transverse beam, 3-Longitudinal column, 4-Buckling restraint brace, 5-Connector, 6-Viscous damper, 7-Steel node plate, 701-Node plate, 702-Embedded part, 703-Tie bolt, 704-Stiffening rib, 705-Edge sealing plate, 8-Anchor bolt seat. Detailed Implementation

[0056] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following embodiments are based on the above-described technical solutions of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0057] Example:

[0058] like Figure 1 The above-described energy dissipation and vibration reduction structure for use in medical buildings includes: multiple transverse beams 2 and longitudinal columns 3 that are connected in a crisscross pattern to form multiple frame grids 1, buckling restraint braces 4 arranged diagonally within the frame grids 1, and viscous damping components arranged within the frame grids 1.

[0059] The viscous damping assembly includes a connector 5, one above the other, which is disposed on adjacent transverse beams 2, and a viscous damper 6, which is parallel to the transverse beams 2 and whose two ends are respectively connected to the upper connector 5 and the lower connector 5.

[0060] This embodiment combines a combined energy dissipation and vibration reduction technology using a wall-connected viscous damper 6 and a buckling-restrained brace 4, which greatly improves the seismic performance of the structure. At the same time, it responds to the requirements of key seismic fortification categories and the regulations on seismic management of building projects, ensuring that it can meet normal use requirements when a seismic fortification earthquake occurs in this region, that is, it can be used immediately under moderate earthquakes, thus improving the seismic toughness of the structure.

[0061] In some specific embodiments, the buckling restraint braces 4 and viscous damping components are respectively disposed within the corresponding transversely arranged frame grids 1. Preferably, the transversely adjacent buckling restraint braces 4 and viscous damping components are referred to as energy dissipation and damping combinations, and multiple energy dissipation and damping combinations are evenly distributed.

[0062] In some preferred embodiments, multiple viscous damping components are arranged sequentially along the longitudinal direction within multiple frame grids 1; multiple buckling restraint supports 4 are arranged sequentially along the longitudinal direction within multiple frame grids 1.

[0063] In some specific embodiments, such as Figures 2-4As shown, the buckling-restrained brace 4 is provided with steel gusset plates 7 at both ends and is connected to the frame grid 1 through the steel gusset plates 7; more specifically, the steel gusset plates 7 include gusset plates 701 located at the corners of the frame grid 1, embedded parts 702 respectively embedded on the opposite sides of the transverse beam 2 and the longitudinal column 3, tie bolts 703 located between the embedded parts 702 and passing through the transverse beam 2 and / or the longitudinal column 3; stiffening ribs 704 located opposite to the sides of the gusset plates 701; the embedded parts 702 located on one side of the transverse beam 2 and the longitudinal column 3 are connected to the gusset plates 701; the extension direction of the stiffening ribs 704 is consistent with that of the buckling-restrained brace 4.

[0064] In some specific embodiments, the node plate 701 is also provided with an edge banding plate 705.

[0065] In some specific embodiments, such as Figures 5-7 As shown, connector 5 is a connecting wall adapted to transverse beam 2; viscous damper 6 has anchor seats 8 hinged at both ends, and the bottom of anchor seats 8 is embedded in the connecting wall.

[0066] As a specific technical solution, the transverse beam 2 and the longitudinal column 3 are concrete beams or reinforced concrete beams.

[0067] like Figure 8 As shown, a design method for a combined energy dissipation and vibration reduction structure is proposed for the podium building of a newly constructed university-affiliated hospital in Shanghai. The seismic fortification intensity is 7 degrees 0.1g, the seismic group is Group 2, and the seismic fortification classification is Class B. The building has four stories above ground. The main roof structure is 20.7 meters high, and the main structure is a reinforced concrete frame. The structural safety level is Level 1, the building site category is Class IV, and the frame seismic resistance level is Level 2. This design method includes the following steps:

[0068] S1: Based on the overall design objectives of combined energy dissipation and vibration reduction, assess the total lateral stiffness required by the main structure under frequent earthquakes;

[0069] S2: Determine the lateral stiffness of buckling-restrained brace 4 based on the total lateral stiffness of the main structure;

[0070] S3: Determine the arrangement scheme of buckling-restrained brace 4 based on its lateral stiffness.

[0071] S4: Calculate whether the lateral stiffness and arrangement of buckling-restrained brace 4 meet the total lateral stiffness of the main structure.

[0072] If not, proceed to steps S2 to S4, and in step S2, redetermine the lateral stiffness of the buckling-restrained brace 4;

[0073] If so, proceed to step S5;

[0074] S5: Determine the seismic reduction targets for the main structure under design earthquake conditions;

[0075] S6: Based on the seismic reduction target of the main structure under the design earthquake, determine the additional damping ratio and quantity required for viscous damper 6;

[0076] S7: Determine the arrangement scheme of viscous damper 6 based on the additional damping ratio and quantity required by viscous damper 6.

[0077] S8: Calculate whether the additional damping ratio, quantity, and arrangement scheme of the viscous dampers 6 meet the seismic reduction target of the main structure under the design earthquake.

[0078] If not, proceed to steps S6 to S8, and in step S6, redetermine the additional damping ratio and number of viscous dampers 6; or proceed to steps S2 to S8, and in step S2, redetermine the lateral stiffness of buckling restraint brace 4.

[0079] For example, depending on the designer's habits, the damping ratio can be adjusted first, the number of dampers can be increased and the arrangement can be adjusted, and then the stiffness and energy dissipation capacity of the energy dissipation support can be adjusted; or the stiffness and energy dissipation capacity of the energy dissipation support can be adjusted first, and then the damping ratio can be adjusted, the number of dampers can be increased and the arrangement can be adjusted.

[0080] If so, proceed to step S9;

[0081] S9: Perform vibration reduction structure verification according to the specifications, and check whether the strength, stability and overall stiffness of the components for frequent earthquakes, design earthquakes and rare earthquakes meet the requirements by fine-tuning the buckling restraint brace 4 and viscous damper 6.

[0082] If not, proceed to steps S6 to S9, and in step S6, redetermine the additional damping ratio and number of viscous dampers 6; or proceed to steps S2 to S9, and in step S2, redetermine the lateral stiffness of buckling-restrained brace 4.

[0083] For example, depending on the designer's habits, the damping ratio can be adjusted first, the number of dampers can be increased and the arrangement can be adjusted, and then the stiffness and energy dissipation capacity of the energy dissipation support can be adjusted; or the stiffness and energy dissipation capacity of the energy dissipation support can be adjusted first, and then the damping ratio can be adjusted, the number of dampers can be increased and the arrangement can be adjusted.

[0084] If so, then determine the combined energy dissipation and vibration reduction structural scheme.

[0085] A construction method for a combined energy dissipation and vibration reduction structure includes the following steps:

[0086] S1: Pre-fabricated buckling restraint brace 4, and the connection structure between buckling restraint brace 4 and frame grid 1; pre-fabricated viscous damper 6, and the connection structure between viscous damper 6 and transverse beam 2;

[0087] S2: On-site construction or installation of the main frame structure system, namely transverse beams 2 and longitudinal columns 3;

[0088] S3: Transport the processed buckling restraint brace 4, viscous damper 6 and corresponding connecting structure to the construction site and install them on site.

[0089] To improve the seismic performance of the structure, reduce seismic forces, and comply with the requirements of the Seismic Management Regulations for Construction Projects, this embodiment adopts a combined energy dissipation and damping technology scheme using wall-connected viscous dampers and buckling-restrained braces. Under frequent and design earthquakes, the buckling-restrained braces primarily provide stiffness; under rare earthquakes, they also dissipate energy in addition to providing stiffness. The viscous dampers do not provide stiffness but dissipate energy under both design and rare earthquakes, providing additional damping ratio to the structure and protecting the main structure.

[0090] The adoption of combined energy dissipation and vibration reduction technology greatly improves the seismic performance of the structure. At the same time, it responds to the requirements of key seismic fortification and the regulations on seismic management of building projects, ensuring that it can meet the normal use requirements when a seismic fortification earthquake occurs in this region. That is, it can be used immediately under moderate earthquakes, so that the structure has two seismic fortification systems and improves the seismic toughness of the structure.

[0091] The medical building structural system adopting the combined energy dissipation and vibration reduction technology has a simple and applicable design method, optimizes the structural design process, is easy to install on site, and is all dry operation, which has good economic and environmental benefits.

[0092] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A design method for a combined energy dissipation and vibration reduction structure, characterized in that, The combined energy dissipation and vibration reduction structure includes: multiple transverse beams (2) and longitudinal columns (3) that are connected in a crisscross pattern to form multiple frame grids (1), buckling restraint braces (4) set in the frame grids (1) along the diagonal direction, and viscous damping components set in the frame grids (1); The viscous damping assembly includes a connector (5) with one upper and one lower part respectively disposed on adjacent transverse beams (2), and a viscous damper (6) parallel to the transverse beams (2) and connected at both ends to the upper connector (5) and the lower connector (5) respectively. The buckling restraint brace (4) is provided with steel node plates (7) at both ends and is connected to the frame grid (1) through the steel node plates (7); The steel node plate (7) includes a node plate (701) located at the corner of the frame grid (1), embedded parts (702) respectively embedded on the opposite sides of the transverse beam (2) and the longitudinal column (3), tie bolts (703) located between the embedded parts (702) and passing through the transverse beam (2) and / or the longitudinal column (3); and stiffening ribs (704) located on the opposite side of the node plate (701). The embedded part (702) located on one side of the transverse beam (2) and the longitudinal column (3) is connected to the node plate (701); The extension direction of the stiffening rib (704) is consistent with that of the buckling-restrained brace (4); The design methodology includes the following steps: S1: Based on the overall design objectives of combined energy dissipation and vibration reduction, assess the total lateral stiffness required by the main structure under frequent earthquakes; S2: Determine the lateral stiffness of the buckling-restrained brace (4) based on the total lateral stiffness of the main structure; S3: Determine the arrangement scheme of the buckling-restrained brace (4) based on the lateral stiffness of the buckling-restrained brace (4); S4: Calculate whether the lateral stiffness and arrangement of the buckling-restrained brace (4) meet the total lateral stiffness of the main structure; If not, proceed to steps S2~S4, and in step S2, redetermine the lateral stiffness of the buckling-restrained brace (4); If so, proceed to step S5; S5: Determine the seismic reduction targets for the main structure under design earthquake conditions; S6: Based on the seismic reduction target of the main structure under the design earthquake, determine the additional damping ratio and quantity required for the viscous damper (6); S7: Determine the arrangement scheme of the viscous damper (6) according to the additional damping ratio and quantity required by the viscous damper (6); S8: Calculate whether the additional damping ratio, quantity and arrangement of the viscous dampers (6) meet the seismic reduction target of the main structure under the design earthquake. If not, proceed to steps S6 to S8, and in step S6, redetermine the additional damping ratio and number of viscous dampers (6); or proceed to steps S2 to S8, and in step S2, redetermine the lateral stiffness of the buckling-restrained brace (4). If so, proceed to step S9; S9: Perform the calculation of the damping structure according to the specifications, and check whether the strength, stability and overall stiffness of the components of the frequently encountered earthquakes, the design earthquakes and the rare earthquakes meet the requirements by fine-tuning the buckling restraint brace (4) and the viscous damper (6); If not, proceed to steps S6 to S9, and in step S6, redetermine the additional damping ratio and number of viscous dampers (6); or proceed to steps S2 to S9, and in step S2, redetermine the lateral stiffness of the buckling-restrained brace (4). If so, then determine the combined energy dissipation and vibration reduction structural scheme.

2. The design method of the combined energy dissipation and vibration reduction structure according to claim 1, characterized in that, The buckling restraint support (4) and the viscous damping component are respectively located in the corresponding frame grid (1) arranged laterally.

3. The design method of the combined energy dissipation and vibration reduction structure according to claim 1, characterized in that, Multiple viscous damping components are arranged longitudinally within multiple frame grids (1); multiple buckling restraint braces (4) are arranged longitudinally within multiple frame grids (1).

4. The design method of the combined energy dissipation and vibration reduction structure according to claim 1, characterized in that, The transversely adjacent anti-buckling restraint brace (4) and viscous damping component are referred to as energy dissipation and damping combination, and multiple energy dissipation and damping combinations are evenly arranged.

5. The design method of the combined energy dissipation and vibration reduction structure according to claim 1, characterized in that, The connector (5) is a connecting wall adapted to the transverse beam (2).

6. The design method of the combined energy dissipation and vibration reduction structure according to claim 4, characterized in that, The viscous damper (6) has anchor seats (8) hinged at both ends, and the bottom of the anchor seats (8) is embedded in the connecting wall.

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