Bottom column and elevated station structure

Abstract

The utility model belongs to the technical field of rail transit buildings, and particularly relates to a bottom column and an elevated station structure, the elevated station structure is supported by the bottom column, the bottom column comprises at least two sub-columns which are equal in height and parallel to each other, and every two adjacent sub-columns are connected through an inerter damping system. The inerter shock absorption system is a series type inerter shock absorption system, a series-parallel I type inerter shock absorption system or a series-parallel II type inerter shock absorption system. The inerter shock absorption system is connected with the sub-columns to form a split type design, and compared with a single column, the inerter shock absorption system can dissipate earthquake energy conducted into the sub-columns, the risk that the sub-columns are damaged is reduced, and therefore the bearing safety performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transit construction, and in particular relates to a bottom column and an elevated station structure. Background Art

[0002] Urban rail transit is mainly divided into three types: underground rail, ground rail and elevated rail. Among them, elevated rail has been widely used due to its advantages of short construction period, low project cost, small footprint and high space utilization. As the hub of elevated rail lines, various new elevated stations are being adopted in rail transit construction. According to the relationship and connection form between the building structure and the rail bridge structure, elevated stations mainly have three structural systems: building-bridge integration, building-bridge separation and building-bridge combination. Among them, the building-bridge integration structural system is now more widely used. At present, there are still deficiencies in the design specifications for the building-bridge integration structural system.

[0003] The structural system of the integrated bridge and building elevated station mainly includes single-column, double-column, three-column and more than three-column structures. Figure 1 As shown in the figure, it has been widely used in China due to its advantages of good integrity and stability, short construction period, small footprint, and little impact on the ground road layer. As the main vertical load-bearing component of the elevated station structure, the seismic safety performance of the bottom column is related to the seismic safety performance of the entire structure.

[0004] At present, the bottom column of the Jianqiaoheyi elevated station structure is a reinforced concrete structure, which relies on its own strength to resist earthquakes. When the earthquake is too strong, the column is prone to enter the plastic failure stage. Due to its weak plastic energy dissipation capacity and the fact that the structure has no other way to dissipate earthquake energy, the overall load-bearing safety performance of the structure cannot be guaranteed. Therefore, in order to protect the main structural components and improve the energy dissipation performance of the structure, it is necessary to take corresponding shock absorption control measures to improve the structure. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned problems existing in the prior art and provide a base column and an elevated station structure.

[0006] The utility model is realized through the following technical scheme: a base column comprises at least two sub-columns of equal height and parallel to each other, and two adjacent sub-columns are connected through an inertia capacity shock absorbing system.

[0007] Furthermore, the sub-columns are made of reinforced concrete.

[0008] Furthermore, the inertial capacity shock absorption system is a series inertial capacity shock absorption system, a hybrid I type inertial capacity shock absorption system or a hybrid II type inertial capacity shock absorption system.

[0009] Furthermore, the inertia capacity damping system is distributed at equal intervals along the height direction of the sub-columns.

[0010] Furthermore, the damping direction of the inertia damping system is perpendicular to the height direction of the sub-column.

[0011] Furthermore, the cross-section of the sub-column is rectangular, circular or elliptical.

[0012] Furthermore, it comprises at least two sub-columns which are arranged side by side and have equal cross-sections, and the inertia damping system is located on the line connecting the center points of each sub-column.

[0013] Furthermore, it includes three sub-columns forming a triangle.

[0014] Furthermore, it includes four sub-columns forming a rectangle.

[0015] The utility model also provides an elevated station structure, which comprises the bottom column provided by the utility model.

[0016] Compared with the prior art, the beneficial effects of the utility model include:

[0017] 1. The utility model connects the sub-columns through the inertia capacity shock-absorbing system to form a split design. Compared with a single column, the inertia capacity shock-absorbing system can dissipate the seismic energy transmitted into the sub-columns, reduce the risk of damage to the sub-columns, and thus improve the bearing safety performance.

[0018] 2. The base column of the utility model is a split design, which has more supporting points than a single column and can support a larger span. In addition, when supporting the same span, it has a lighter weight than a single column.

[0019] 3. The utility model can select different numbers of sub-columns to form different shapes according to actual construction needs, and then use the inertia capacity shock-absorbing system to connect them as a whole, which is flexible in construction and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a single-column elevated station in the prior art;

[0021] Figure 2 It is a structural schematic diagram of a series inertial capacity shock absorption system;

[0022] Figure 3 It is a structural schematic diagram of a hybrid I-type inertial capacity shock absorption system;

[0023] Figure 4 It is a structural schematic diagram of a hybrid II type inertial capacity shock absorption system;

[0024] Figure 5 It is a front view of the bottom column in Example 1;

[0025] Figure 6 is a top view of the bottom column in Example 1;

[0026] Figure 7 It is a displacement time history response comparison diagram of a single-column bridge-building integrated elevated station structure under Cerro Prieto excitation and a bridge-building integrated elevated station structure using the bottom column in Example 1;

[0027] Figure 8 is a top view of the bottom column in Example 2;

[0028] Fig. 9 This is a top view of the bottom column in Example 3. DETAILED DESCRIPTION

[0029] At present, the bottom column of the Jianqiaoheyi elevated station structure is a reinforced concrete structure, which relies on its own strength to resist earthquakes. When the earthquake is too large, the column is prone to enter the plastic failure stage. Due to its weak plastic energy absorption capacity and the fact that the structure has no other ways to dissipate earthquake energy, the overall bearing safety performance of the structure cannot be guaranteed at this time.

[0030] Therefore, in order to protect the main structural components and improve the energy consumption performance of the structure, the utility model provides a base column, including at least two sub-columns of equal height and parallel to each other, and two adjacent sub-columns are connected by an inertia damping system.

[0031] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0032] refer to Figure 2 As shown, the inertia capacitance damping system is a new type of high-efficiency vibration absorption and shock absorption device with two ends. Compared with the traditional vibration absorption and shock absorption device, the inertia capacitance damping system uses an inertia capacitance element to replace the mass block. Its main components are spring 101, damping element 102 and inertia capacitance element 103. As an inertia container, the inertia capacitance element 103 can be completely analogous to the capacitor in the circuit. The capacitor is used to store and release electrical energy, while the inertia capacitance is used to store and release mechanical energy. As a mass element related to the two end points, there is a relationship between the inertia capacitance and the acceleration between the two end points. When the two end points have an acceleration difference, the inertia capacitance element can be stimulated to adjust the inertia and transfer energy.

[0033] In addition to the inertia damping system Figure 2 The series inertia damping system shown in FIG. 1 further includes Figure 3 to Figure 4 The hybrid I type inertial capacity shock absorption system and the hybrid II type inertial capacity shock absorption system are shown respectively.

[0034] The bottom column of the utility model can adopt any one of a series inertial capacity shock absorbing system, a hybrid I type inertial capacity shock absorbing system or a hybrid II type inertial capacity shock absorbing system.

[0035] The utility model can select different numbers of sub-columns to form different shapes according to actual construction requirements, and then use an inertia capacity damping system to connect them as a whole, which is flexible in construction and easy to promote. Specific embodiments are used for specific description below.

[0036] Example 1

[0037] refer to Figure 5 and Figure 6 As shown, a base column includes two sub-columns 2 of equal height and parallel to each other. The two sub-columns 2 are arranged side by side, and the cross-sections of the two sub-columns are equal (the cross-sections have the same shape and area). The two sub-columns are connected by an inertia capacity shock-absorbing system 1, and the inertia capacity shock-absorbing system is located on the line connecting the center points of each sub-column.

[0038] It should be noted that for elevated stations with larger lateral spans, three or more sub-columns can be arranged side by side, and then an inertia capacity shock-absorbing system can be used to connect adjacent sub-columns.

[0039] In this embodiment, the sub-column is made of reinforced concrete, and the cross section of the sub-column is rectangular. The height of the sub-column is 7800 mm, the length of the cross section of the sub-column is 1550 mm, the width is 1300 mm, and the interval between two sub-columns is 500 mm.

[0040] In this embodiment, the inertial capacity shock absorption system is a hybrid II type inertial capacity shock absorption system. The shock absorption direction of the inertial capacity shock absorption system is perpendicular to the height direction of the sub-column. The inertial capacity shock absorption system is evenly distributed along the height direction of the sub-column, and the interval between adjacent inertial capacity shock absorption systems is 1850mm.

[0041] The bottom column in this embodiment is used as the bottom support structure to replace the single column in the bridge-building elevated station structure, and the parameters of the inertia capacity damping system are designed according to the following steps:

[0042] ⑴ Based on the performance requirements of the single-column bridge-bridge elevated station structure, the target equivalent damping ratio ζ is assumed eq,t ;

[0043] (2) The assumed target equivalent damping ratio is regarded as the equivalent damping ratio ζ eq =ζ eq,t , that is, and use the required inertia ratio formula to calculate μ;

[0044] ⑶ Use the required inertia ratio μ of the inertia damping system calculated above to calculate the stiffness ratio K and the nominal damping ratio ξ;

[0045] (4) After calculating the parameters of the inertia capacity damping system, add the parameters to the elevated station structure and

[0046] Force-time analysis is used to verify whether the elevated station structure meets the performance requirements;

[0047] ⑸ If the above parameters can meet the performance requirements, then end; if they do not meet the performance requirements, increase the target equivalent damping ratio ζ eq,t , repeat the above steps until the performance requirements are met.

[0048] pass Figure 7 It can be seen that the displacement of the integrated bridge-building and elevated station structure (new structure) using the bottom column in this embodiment under Cerro Prieto excitation is significantly reduced compared to the integrated bridge-building and elevated station structure (original structure) using a single column, indicating that the bottom column of the utility model has a good shock-absorbing effect.

[0049] Example 2

[0050] refer to Figure 8 As shown, the difference between this embodiment and embodiment 1 is that this embodiment includes three sub-columns 3 that form a triangle, and the cross-section of the sub-columns 3 is circular or elliptical.

[0051] Two adjacent sub-columns 3 are connected via an inertial capacity shock absorbing system, and the inertial capacity shock absorbing system is a series inertial capacity shock absorbing system, a hybrid I type inertial capacity shock absorbing system or a hybrid II type inertial capacity shock absorbing system.

[0052] The bottom column of this embodiment provides three supporting points for the elevated station, forming a more stable surface support. Compared with a single column of the same volume, the weight is greatly reduced, and the supporting and earthquake resistance are improved.

[0053] Example 3

[0054] refer to Fig. 9 As shown, the difference between this embodiment and embodiment 1 is that this embodiment includes four sub-columns 4 that form a rectangle, and the cross-section of the sub-columns 4 is a square.

[0055] Two adjacent sub-columns 4 are connected via an inertial capacity shock absorbing system, and the inertial capacity shock absorbing system is a series inertial capacity shock absorbing system, a hybrid I type inertial capacity shock absorbing system or a hybrid II type inertial capacity shock absorbing system.

[0056] The bottom column of this embodiment provides four supporting points for the elevated station, forming a more stable surface support. Compared with a single column of the same volume, the weight is greatly reduced, and the supporting and earthquake resistance are improved.

[0057] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0058] The above technical solution is only one implementation method of the utility model. For those skilled in the art, it is easy to make various types of improvements or modifications based on the principles disclosed in the utility model, and it is not limited to the technical solution described in the above specific embodiments of the utility model. Therefore, the above description is only preferred and does not have a restrictive meaning.

Claims

1. A base column, characterized in that: It comprises at least two sub-columns of equal height and parallel to each other, at least two sub-columns are arranged side by side, and the cross-sections of the sub-columns have the same shape and equal area; Two adjacent sub-columns are connected via an inertia capacity shock absorbing system, and the inertia capacity shock absorbing system is evenly distributed on a line connecting the center points of each sub-column along the height direction of the sub-columns.

2. The bottom column according to claim 1, characterized in that: The sub-column is made of reinforced concrete.

3. The bottom column according to claim 1, characterized in that: The inertial capacity shock absorption system is a series inertial capacity shock absorption system, a hybrid I type inertial capacity shock absorption system or a hybrid II type inertial capacity shock absorption system.

4. The bottom column according to claim 1, characterized in that: The damping direction of the inertia damping system is perpendicular to the height direction of the sub-column.

5. The bottom column according to claim 1, characterized in that: The cross section of the sub-column is rectangular, circular or elliptical.

6. The bottom column according to claim 1, characterized in that: It consists of three sub-columns forming a triangle.

7. The bottom column according to claim 1, characterized in that: It consists of four sub-columns forming a rectangle.

8. An elevated station structure, characterized in that: It comprises a bottom column as described in any one of claims 1 to 7.

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