Structure of assembly type self-resetting gravity column

Abstract

The utility model discloses a structure of an assembly type self-resetting gravity column. The assembly type self-resetting gravity column comprises column body concrete, common steel bars and a prestressed tendon longitudinally arranged in the center of the column body concrete. The column body concrete is provided with a hole which longitudinally penetrates through the column body and is used for containing the prestressed tendon, the common steel bar comprises a stirrup and a common longitudinal bar which are connected with each other, the common steel bar is only arranged on the column body and does not penetrate through a column section connecting interface, and the prestressed tendon longitudinally penetrates through the whole length of the component and penetrates through the column section connecting interface. The assembly type self-resetting gravity column is simple in structure, easy to recover after an earthquake and convenient to produce and construct, and the problems that an existing assembly type concrete column is complex in structure and connection and poor in recoverability are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforced concrete columns, in particular to the structure of an assembled self-resetting gravity column. Background Art

[0002] Reinforced concrete columns are important load-bearing components in concrete structures. They can be categorized by shape as rectangular or special-shaped. They can also be divided into cast-in-place and prefabricated columns based on their production and construction methods. Currently, cast-in-place rectangular columns and prefabricated rectangular columns are the most common methods. In terms of load bearing capacity, they can be designed as frame columns designed to withstand both vertical gravity and horizontal bending moments, or as gravity columns designed to withstand only vertical gravity. Existing concrete gravity columns are complex in structure and difficult to restore to their original state after a major earthquake.

[0003] The existing method for constructing cast-in-place rectangular columns requires first tying longitudinal reinforcement and stirrups on-site to form a steel cage, then pouring concrete. Once the concrete has solidified and reached a certain strength, the formwork surrounding the column is removed. The main drawbacks are the complex process and long construction times.

[0004] Prior art, such as CN 105544865 B, discloses a prestressed, assembled, composite, special-shaped column. While prestressed tendons are incorporated into the special-shaped column, it is a steel special-shaped column structure. Research and development of steel special-shaped columns is relatively mature, with several projects already underway. Common issues with steel structures include the need for large steel plates and bolted connections, resulting in high costs, poor fire and corrosion resistance, and the need for on-site casting, which can be time-consuming.

[0005] Currently, the primary method for prefabricated rectangular columns, both domestically and internationally, is to use grouting sleeve connections. This involves embedding a prefabricated sleeve within the precast concrete component, inserting the rebar through the sleeve, and injecting grouting material to achieve the desired connection. This technology is also the primary method for mechanically connecting all vertical rebar between precast component layers in China. However, its disadvantages include a high number of rebar alignments, difficulty controlling grouting quality, a lack of simple, efficient, and reliable grouting quality testing methods, high costs, and low seismic resistance. Utility Model Content

[0006] In order to solve the problems of complex structure and connection and poor recoverability of existing assembled concrete columns, the present invention provides a structure of an assembled self-resetting gravity column with simple structure, easy recovery after earthquake, and convenient production and construction.

[0007] The technical solution for achieving the purpose of the utility model is: a structure of an assembled self-resetting gravity column, the assembled self-resetting gravity column includes column body concrete, ordinary steel bars and a prestressed tendon longitudinally arranged at the center position of the column body concrete; the column body concrete is provided with a hole that passes through the column body longitudinally for accommodating the prestressed tendon, the ordinary steel bars include stirrups and ordinary longitudinal bars that are connected to each other, the ordinary steel bars are only provided in the column body and do not pass through the column segment connection interface, and the prestressed tendon passes through the entire length of the component longitudinally and passes through the column segment connection interface.

[0008] Preferably, a raised shear key or rough surface is provided at the lower end of the column concrete, and a groove or rough surface is provided at the corresponding position of the upper end of the column concrete. The concave and convex settings of the upper and lower corresponding ends of the column concrete are beneficial to the shear resistance of the column section connection interface.

[0009] Preferably, the prestressed tendons are arranged coaxially with the hole.

[0010] By adopting the above technical solution, the present invention has the following beneficial effects: (1) The present invention has an ingenious structure. The ordinary steel bars of the component do not pass through the connection interface, and only a small amount of prestressed bars pass through. On site, it is only necessary to hoist the prefabricated component into place, connect the prestressed bars, and then tension them. The number of steel bar connections is small, and the number of sleeves is greatly reduced. This solves the problem of the existing prefabricated assembly column with a large number of steel bar connections, difficult connection quality control, and high connection cost.

[0011] (2) Under the action of an earthquake, the assembled self-resetting gravity column swings and opens along the concave and convex joints at the bottom, which can effectively reduce the impact of the earthquake and play a role in energy dissipation and shock absorption. The structural damage is small, and after the earthquake, gravity and prestressed tendons provide restoring force, so the column can be quickly restored to use.

[0012] (3) The assembled self-resetting gravity column proposed in this utility model has a simple structure, is easy to install, and has good seismic resistance, and has obvious engineering advantages. The column body concrete is a finished product produced on demand in the factory and does not need to be cast in situ during the construction process, which solves the technical problems of high cost and poor fire and corrosion resistance caused by the use of steel gravity columns in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0014] Figure 1 This is a cross-sectional view of the assembled self-resetting gravity column of the utility model;

[0015] Figure 2 This is a three-dimensional diagram of the assembled self-resetting gravity column of the utility model;

[0016] Figure 3This is a cross-sectional view of the assembled self-resetting gravity column of the utility model;

[0017] Figure 4 This is a cross-sectional view of the concrete column in the utility model;

[0018] Figure 5 is a cross-sectional view of an ordinary steel bar in the present utility model; DETAILED DESCRIPTION

[0019] Example 1

[0020] See Figures 1 to 5 The structure of the assembled self-resetting gravity column of this embodiment is a square arrangement, comprising a column body concrete 1, ordinary steel bars 2 and a prestressed tendon 3 longitudinally arranged at the center of the column body concrete; the column body concrete 1 is provided with a hole 101 longitudinally penetrating the column body for accommodating the prestressed tendon, and the ordinary steel bars 2 include stirrups 201 and ordinary longitudinal bars 202 connected to each other. The ordinary steel bars 2 are only provided in the column body and do not pass through the column segment connection interface. The prestressed tendons longitudinally pass through the entire length of the component and pass through the column segment connection interface. The utility model proposes a structure of an assembled self-resetting gravity column. The ordinary steel bars of the component do not pass through the connection interface, and only a small amount of prestressed tendons pass through. On site, it is only necessary to hoist the prefabricated component into place, connect the prestressed tendons and then tension them. The number of steel bar connections is small, and the number of sleeves is greatly reduced. It solves the problem of a large number of steel bar connections and high connection costs in existing prefabricated assembly columns. Under the influence of an earthquake, the assembled self-resetting gravity column swings and expands along the bottom joint, effectively mitigating the impact of the earthquake and dissipating energy and shock. This minimizes structural damage, and after the earthquake, gravity and prestressed tendons provide restorative force, allowing for rapid restoration. The assembled self-resetting gravity column proposed in this utility model offers significant engineering advantages, including simple construction, easy installation, and excellent seismic performance.

[0021] The lower end of the column concrete 1 is provided with a raised shear key 102 or a rough surface, and the corresponding position of the upper end of the column concrete 1 is provided with a groove 103 or a rough surface. The concave and convex settings of the upper and lower corresponding ends of the column concrete are beneficial to the shear resistance of the column section connection interface.

[0022] The prestressed tendon 3 is coaxially arranged with the hole 101 .

[0023] The assembled self-resetting gravity column is connected to the prefabricated beam through the beam-column connection area.

[0024] Each of the assembled self-resetting gravity columns is longitudinally connected via a support.

[0025] The prestressed tendons between adjacent assembled self-resetting gravity columns are connected via connectors.

[0026] During the implementation process, prefabricated self-centering gravity columns that meet the design requirements are prefabricated in the factory and moved to the construction area, and prefabricated beams and floor slabs are installed.

[0027] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A structure of an assembled self-resetting gravity column, characterized in that: The assembled self-resetting gravity column comprises a column concrete (1), ordinary steel bars (2), and a prestressed bar (3) longitudinally arranged at the center of the column concrete; the column concrete (1) is provided with a hole (101) longitudinally penetrating the column for accommodating the prestressed bar; the ordinary steel bars (2) comprise stirrups (201) and ordinary longitudinal bars (202) connected to each other; the ordinary steel bars (2) are only arranged in the column and do not pass through the column-segment connection interface; the prestressed bar longitudinally penetrates the entire length of the component and passes through the column-segment connection interface.

2. The structure of the assembled self-resetting gravity column according to claim 1 is characterized in that: A raised shear key or a rough surface (102) is provided at the lower end of the column concrete (1), and a groove (103) or a rough surface is provided at a corresponding position on the upper end of the column concrete (1).

3. The structure of the assembled self-resetting gravity column according to claim 1 is characterized in that: The prestressed tendon (3) and the hole (101) are arranged coaxially.

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