Multi-storey logistics warehouse structure for medium and high seismic intensity areas

Abstract

The present invention relates to a multi-storey logistics warehouse structure for medium and high-intensity earthquake regions, which comprises a frame structure and K-shaped strengthening units; the frame structure includes frame columns and frame beams, the frame columns are fixedly distributed in a rectangular array, and the frame columns are connected by frame beams. The frame beams are arranged at floor levels and the frame columns and frame beams are rigidly connected at the joints; the K-shaped strengthening units include horizontal bars and V-shaped diagonal braces; the horizontal bars are located below the frame beams and the distances from both ends of the horizontal bars to both ends of the frame beams are not less than 1 / 3 of the floor height where the horizontal bars are located; the horizontal bars are rigidly connected to the frame columns; the lower ends of the V-shaped diagonal braces are fixed to the horizontal bars, and the upper parts of the V-shaped diagonal braces are fixed to the joints of the frame columns and frame beams; the K-shaped strengthening units are arranged around the fire compartments in the frame structure. The advantages of the present invention are: the K-shaped strengthening units can increase the stiffness of the frame structure and reduce the beam and column sizes of the frame structure of the multi-storey logistics warehouse in medium and high-intensity earthquake-resistant regions.

Description

Technical Field

[0001] The present invention relates to the field of building technology, and particularly to a multi-story logistics warehouse structure for medium and high-intensity earthquake regions. Background Art

[0002] The logistics industry has become an important basic condition to ensure the economic development of modern countries. Logistics warehousing plays a role of buffering, regulating and balancing in logistics operations. Today, with the increasingly tense land resources, multi-story logistics warehouses have gradually become the main construction form around central cities.

[0003] Currently, the floor height of the mainstream multi-story logistics warehouses is usually 10 - 12m, the column spacing is 10 - 12m, and the floor live load is 2T / m 2 . Due to the requirements of logistics processes, the layout of structural members on the side adjacent to the unloading platform of the multi-story logistics warehouse should not affect the unloading operation of trucks.

[0004] In medium and high-intensity earthquake-resistant regions, when constructing a multi-story logistics warehouse with a floor height 3 - 4 times that of conventional civil buildings and a floor live load 8 - 10 times that of conventional civil buildings, if a conventional cast-in-place frame structure system is adopted, the cross-sectional dimensions of the frame beam-columns of the main structure are often very large, and a huge support formwork system needs to be erected on site, resulting in high construction costs, large material consumption, and long construction periods. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-story logistics warehouse structure for medium and high-intensity earthquake regions, which can significantly increase the stiffness of the frame structure and can significantly reduce the beam-column dimensions of the frame structure of the multi-story logistics warehouse in medium and high-intensity earthquake-resistant regions.

[0006] The present invention is realized through the following technical solutions: A multi-story logistics warehouse structure for medium and high-intensity earthquake regions, which includes a frame structure and a number of K-shaped strengthening units 2 connected to the frame structure;

[0007] The frame structure includes a number of frame columns 1-1 and a number of frame beams 1-2. The frame columns 1-1 are fixedly distributed in a rectangular array, and the adjacent frame columns 1-1 in any row or column are connected by frame beams 1-2. The frame beams 1-2 are arranged at floor levels, and the frame columns 1-1 and the frame beams 1-2 are rigidly connected at the joints;

[0008] The K-shaped strengthening unit includes a horizontal bar 2-1 and a V-shaped diagonal brace 2-2; the horizontal bar 2-1 is located below the frame beam 1-2, and the distances from both ends of the horizontal bar 2-1 to both ends of the frame beam 1-2 are not less than 1 / 3 of the floor height where the horizontal bar 2-1 is located; both ends of the horizontal bar 2-1 are rigidly connected to the frame column 1-1; the lower ends of the V-shaped diagonal braces 2-2 converge and are fixed at the middle of the horizontal bar 2-1, and the upper ends of both sides of the V-shaped diagonal braces 2-2 converge and are fixed at the joints of the frame column 1-1 and the frame beam 1-2.

[0009] The K-shaped strengthening unit 2 is arranged around the fire compartment of the frame structure.

[0010] The K-shaped strengthening units 2 are arranged continuously around the fire compartment; or the K-shaped strengthening units 2 are arranged at intervals around the fire compartment.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The K-shaped strengthening unit can significantly increase the stiffness of the frame structure, and can significantly reduce the beam and column sizes of the frame structure of multi-story logistics warehouses in areas with medium and high-intensity seismic fortification.

[0013] 2. The setting of the K-shaped strengthening unit will not affect the passage of transport vehicles, will not cause any interference to the technological process of the logistics warehouse, and will not reduce the storage space utilization efficiency of the logistics warehouse.

[0014] 3. The combination method of the K-shaped strengthening unit and the frame structure enables the K-shaped strengthening unit to only play a strengthening role under horizontal load conditions, significantly improving the ductility of the overall warehouse structure.

[0015] 4. The K-shaped strengthening unit is arranged around the fire compartment of the main structure, which can significantly increase the torsional stiffness of the structure and reduce the earthquake damage under multi-directional earthquake input.

[0016] 5. The K-shaped strengthening unit can also serve as a supporting member for the rolling shutter door and the exterior wall, reducing the construction cost without affecting the building facade. Description of the Drawings

[0017] Figure 1 It is an axonometric view of the frame structure;

[0018] Figure 2 It is an axonometric view of the K-shaped strengthening unit;

[0019] Figure 3 It is an axonometric view of a single layer of the new multi-story logistics warehouse structure, where the K-shaped strengthening units are arranged continuously;

[0020] Figure 4 It is an axonometric view of a single layer of the new multi-story logistics warehouse structure, where the K-shaped strengthening units are arranged at intervals;

[0021] Figure 5 Axonometric view of the new multi - layer logistics warehouse structure;

[0022] Figure 6 For Scheme A, the deformation of the conventional frame structure under horizontal load;

[0023] Figure 7 For Scheme B, the deformation of the frame structure with continuously arranged K - type strengthening units under horizontal load;

[0024] Figure 8 For Scheme C, the deformation of the frame structure with spaced - arranged K - type strengthening units under horizontal load;

[0025] Figure 9 Axial force distribution of Scheme A under horizontal load;

[0026] Figure 10 Axial force distribution of Scheme B under horizontal load;

[0027] Figure 11 Axial force distribution of Scheme C under horizontal load;

[0028] Figure 12 Bending moment distribution of Scheme A under horizontal load;

[0029] Figure 13 Bending moment distribution of Scheme B under horizontal load;

[0030] Figure 14 Bending moment distribution of Scheme C under horizontal load;

[0031] Label description: 1 - 1 frame column, 1 - 2 frame beam, 2 K - type strengthening unit, 2 - 1 horizontal bar, 2 - 2 V - type diagonal brace. Detailed implementation mode

[0032] The present invention will be described in detail below with reference to the accompanying drawings:

[0033] As Figures 1-5 shown: A multi - layer logistics warehouse structure for medium - to - high seismic intensity areas, which includes a frame structure and a number of K - type strengthening units 2 connected to the frame structure;

[0034] The frame structure includes a number of frame columns 1 - 1 and a number of frame beams 1 - 2. The frame columns 1 - 1 are fixedly distributed in a rectangular array, and adjacent frame columns 1 - 1 in any row or column are connected by frame beams 1 - 2. The frame beams 1 - 2 are arranged at floor levels and the frame columns 1 - 1 and frame beams 1 - 2 are rigidly connected at the joints;

[0035] The K-shaped strengthening unit includes a horizontal rod 2-1 and a V-shaped diagonal brace 2-2; the horizontal rod 2-1 is located below the frame beam 1-2, and the distances from both ends of the horizontal rod 2-1 to both ends of the frame beam 1-2 are not less than 1 / 3 of the floor height where the horizontal rod 2-1 is located; both ends of the horizontal rod 2-1 are rigidly connected to the frame column 1-1; the lower ends of the V-shaped diagonal braces 2-2 converge and are fixed to the middle of the horizontal rod 2-1, and the upper two ends of the V-shaped diagonal braces 2-2 converge and are fixed to the joints of the frame column 1-1 and the frame beam 1-2;

[0036] The K-shaped strengthening unit 2 is arranged around the fire compartment in the frame structure. According to the distribution method of the K-shaped strengthening unit 2 in the fire compartment, it can be divided into the following two embodiments: Embodiment 1

[0037] The K-shaped strengthening unit 2 is continuously arranged in the fire compartment (see Figure 3 ). Embodiment 2

[0038] The K-shaped strengthening unit 2 is arranged at intervals in the fire compartment. The interval arrangement here can be divided into multiple situations.

[0039] In the fire compartment, it can be the area where there is no distributed K-shaped strengthening unit between two K-shaped strengthening units (see Figure 4 ).

[0040] It can also be the area where there is no distributed K-shaped strengthening unit between two groups of K-shaped strengthening units; among them, the number of K-shaped strengthening units in each group of the two groups of K-shaped strengthening units is two, and the corresponding area where there is no distributed K-shaped strengthening unit is two spans (see Figure 8 , 11 , 14).

[0041] The material of the K-shaped strengthening unit 2 is reinforced concrete, so that it can be cast in synchronization with the frame structure or prefabricated and assembled;

[0042] Of course, the material of the K-shaped strengthening unit 2 is a metal material; after the frame structure is built, it is hoisted as a whole and combined with the frame structure. Among them, the V-shaped diagonal brace 2-2 is made of a high-ductility material, and the V-shaped diagonal brace 2-2 is used as an energy-dissipating component to improve the ductility performance of the main load-bearing structure under medium and large earthquakes. The metal materials here mainly refer to steel, aluminum profiles, etc., and the high-ductility materials here can be buckling-restrained braces, etc.

[0043] In order to illustrate the performance of the present invention, the present invention has sorted out the following three schemes according to the type of the frame structure,

[0044] Among them, Scheme A is a conventional frame structure (such as Figure 6 , 9, 12); Scheme B is a frame structure with continuous layout of K-type strengthening units (such as Figure 7 , 10 , 13); Scheme C is a frame structure with spaced layout of K-type strengthening units (such as Figure 8 , 11 , 14). It should be noted that the spaced layout in Scheme C is the second structure mentioned in Embodiment 2.

[0045] For easy comparison, three building structures with exactly the same 3 geometric dimensions and load conditions in the above three schemes were calculated. The calculation results show that the maximum vertex displacement of Scheme B is only 17% of that of Scheme A, and the maximum vertex displacement of Scheme C is only 26% of that of Scheme A. The K-type strengthening unit 2 has a significant strengthening effect. Under the same deformation requirements, the beam-column section sizes of the frame structure can be reduced while increasing the K-type strengthening unit 2.

[0046] In addition, the addition of the K-type strengthening unit 2 makes the moment distribution of the structure more uniform, and the moment at the nodes becomes significantly smaller. A large amount of deformation energy is absorbed by the K-type strengthening unit 2 in the form of axial force, which can ensure the overall performance of the structure under medium and large earthquakes.

[0047] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-story logistics warehouse structure for medium and high-intensity earthquake regions, characterized in that: It includes a frame structure and a number of K-shaped strengthening units (2) connected to the frame structure; The frame structure includes a number of frame columns (1-1) and a number of frame beams (1-2). The frame columns (1-1) are fixedly distributed in a rectangular array. Adjacent frame columns (1-1) in any row or column are connected by frame beams (1-2). The frame beams (1-2) are arranged at the floor elevation, and the frame columns (1-1) and the frame beams (1-2) are rigidly connected at the joints; The K-shaped strengthening unit includes a horizontal rod (2-1) and a V-shaped diagonal brace (2-2); the horizontal rod (2-1) is located below the frame beam (1-2), and the distances from both ends of the horizontal rod (2-1) to both ends of the frame beam (1-2) are not less than 1 / 3 of the floor height where the horizontal rod (2-1) is located. Both ends of the horizontal rod (2-1) are rigidly connected to the frame columns (1-1); the lower ends of the V-shaped diagonal braces (2-2) converge and are fixed to the middle of the horizontal rod (2-1), and the upper ends of the V-shaped diagonal braces (2-2) converge and are fixed to the joints of the frame columns (1-1) and the frame beams (1-2); The K-shaped strengthening units (2) are arranged around the fire compartment in the frame structure; The K-shaped strengthening units (2) are continuously arranged around the fire compartment; or The K-shaped strengthening units (2) are arranged at intervals around the fire compartment.

2. The multi-story logistics warehouse structure for medium and high-intensity earthquake areas according to claim 1, wherein: The material of the K-shaped strengthening unit (2) is reinforced concrete.

3. The multi-story logistics warehouse structure for medium and high-intensity earthquake areas according to claim 1, characterized in that: The material of the K-shaped strengthening unit (2) is a metal material; among them, the V-shaped diagonal brace (2-2) is made of a high ductility material.

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