Pre-stressed prefabricated steel part coated concrete latticed column

Abstract

The utility model discloses a prestressed prefabricated steel part concrete-coated latticed column. The prestressed prefabricated steel part concrete-coated latticed column comprises I-shaped steel, prestressed tendons, lacing bars, concrete, stirrups, longitudinal bars, bolts and the like, wherein the prestressed profile steel coated concrete column limb is prefabricated and formed in a factory, and lacing bars are connected only through reserved bolt holes on a construction site. In order to guarantee good combination between the concrete and the profile steel, a reinforcement cage bound by longitudinal bars and stirrup plates is arranged beside the profile steel, and prestressed tendons are pre-embedded in the reinforcement cage in advance by adopting a pre-tensioning method, the profile steel is combined with the concrete, and the prestressed tendons are pre-embedded in the profile steel, so that the bearing capacity and the rigidity of the section are greatly improved; the device can be flexibly used in a single-layer industrial factory building; in addition, the concrete provides out-of-plane support for the profile steel plate, the profile steel plate provides constraint for the concrete, the concrete and the profile steel plate complement each other, and compared with a pure steel structure and a concrete structure, the fire resistance, the durability and the anti-seismic property are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction, and particularly relates to a prestressed prefabricated assembled steel section covered with concrete lattice column. Background Art

[0002] For lattice columns in steel structure workshops, especially those with large-tonnage cranes in high-intensity areas, the lattice columns are in an eccentrically compressed state, and their cross-sectional design is generally subject to stability control, the material strength cannot be fully utilized, and the steel ratio is high. For concrete structures, the construction process is complex, the construction speed is slow, the cycle is long, and it is easily restricted by site and weather conditions. In addition, concrete components are generally made on site, which has high requirements for the site. Therefore, a lattice column form with fast construction speed, simple installation method, and high eccentric bearing capacity is urgently needed. Utility Model Content

[0003] In order to overcome the shortcomings of the above-mentioned traditional structural types, the purpose of the utility model is to provide a prestressed, prefabricated, assembled steel lattice column partially covered with concrete. The lattice column has been improved in the form of column limbs. The combination of prestressed tendons and concrete is added to the I-beam. The concrete provides out-of-plane support for the steel plate, and the steel plate provides constraints on the concrete. The prestressed tendons greatly improve its resistance to eccentric pressure, thereby solving the problem of eccentric pressure stability of the lattice column. At the same time, all components are completely prefabricated in the factory, with a fast construction speed, which greatly shortens the construction period and is conducive to the implementation of the country's "dual carbon" goals.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is a prestressed prefabricated assembled steel part covered with concrete lattice column, which at least includes: I-beam 1, prestressed tendons 2, tie bars 3, concrete 4, longitudinal bars 5, stirrups 6, high-strength bolts 7 and connecting plates 8; wherein a plurality of column limbs are constituted by the I-beam 1 and the column limb concrete 2, and the column limbs in the plurality of column limbs are connected to each other by tie bars 3, the I-beam 1 is connected to the connecting plate 8, and bolt holes are preset on the connecting plate 8 and the tie bars 3, and the assembly of the lattice column can be completed by the high-strength bolts 7, the longitudinal bars 5 and stirrups 6 are tied into a steel cage, and the prestressed tendons 2 are embedded therein, and are arranged on both sides of the I-beam 1.

[0005] The concrete 4 is made of ultra-high performance concrete, and the bolt holes preset on the connecting plate 8 are arranged equidistantly at a certain interval, so as to facilitate the assembly of tie bars 3 of different numbers and forms according to different engineering conditions.

[0006] There are four prestressed tendons 2 in total, which are arranged in a straight line and are constructed by a pre-tensioning method. After the construction is completed, the parts protruding from the concrete 4 at both ends are cut off.

[0007] The tie bars are made of angle steel.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. Save materials

[0010] In the utility model, prestressed tendons are embedded in the I-beams of the column limbs in advance, which improves the bending bearing capacity and rigidity of the column, and at the same time serves as a channel for cast-in-place concrete, thereby enhancing the overall performance of the structure; under the constraint of concrete, the out-of-plane stability of the steel structure plate on the compression side is greatly improved, thereby improving the utilization rate of materials and saving steel; in addition, the steel section can form a constraint on the concrete, which improves the stress-bearing performance of the concrete while also reducing the amount of concrete used.

[0011] 2. Convenient construction

[0012] The utility model is completely prefabricated in the factory, and all the production processes are completed in the factory. The products can be well maintained, and the mold has higher precision. The products can be produced synchronously and then assembled. Only high-strength bolts need to be used on site to assemble the prepared products, which improves the production speed of the products while ensuring the quality.

[0013] 3. Superior performance

[0014] The concrete part of the utility model is prefabricated and adopts high-performance concrete. The high-performance concrete increases the bearing capacity of the column limbs while further increasing the bonding with the steel section, and also gives the prestressed tendons more room to play, further reducing the dead weight and improving the performance.

[0015] Flexible assembly

[0016] There are large gaps between the lattice column members of the utility model, which can be used as channels for the longitudinal pipeline layout, and the bolt holes are equidistantly arranged in advance on the steel section at a certain interval, so that the tie bars can be arranged in different quantities and forms according to different engineering requirements, thereby more reasonably reducing materials and enhancing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of a portion of the utility model that has not been poured with concrete;

[0019] Figure 3 It is a connection detail diagram of the utility model.

[0020] Explanation of reference numerals:

[0021] 1. I-beam; 2. Prestressed tendons; 3. Tie bars; 4. Concrete; 5. Longitudinal reinforcement; 6. Stirrups; 7. High-strength bolts; 8. Connecting plates.

[0022] The following describes the implementation of the present invention in detail with reference to the accompanying drawings and embodiments: DETAILED DESCRIPTION

[0023] like Figure 1 , Figure 2 , Figure 3 As shown, a prestressed prefabricated assembled steel partially covered concrete lattice column at least includes: an I-shaped steel 1, prestressed tendons 2, tie bars 3, concrete 4, longitudinal bars 5, stirrups 6, high-strength bolts 7 and connecting plates 8; wherein the I-shaped steel 1 and the column limb concrete 4 constitute a plurality of column limbs, and the column limbs in the plurality of column limbs are connected to each other by tie bars 3.

[0024] like Figure 2 and Figure 3 As shown, the I-beam 1 is connected to a connecting plate 8, and bolt holes are preset on the connecting plate 8 and the tie bar 3. The assembly of the lattice column can be completed by high-strength bolts 7. The longitudinal reinforcement 5 and stirrups 6 are tied into a steel cage, and prestressed reinforcement 2 is embedded in it, which is arranged on both sides of the I-beam 1.

[0025] The concrete 4 is made of ultra-high performance concrete, and the bolt holes preset on the connecting plate 8 are arranged equidistantly at a certain interval, so as to facilitate the assembly of tie bars 3 of different numbers and forms according to different engineering conditions.

[0026] There are four prestressed tendons 2 in total, which are arranged in a straight line. The prestressed tendons 2 are constructed using a pre-tensioning method. After the construction is completed, the parts protruding from the concrete 4 at both ends are cut off.

[0027] The column limbs are connected by tie bars 3. Bolt holes are preset on the connecting plate 8 and the tie bars 3. The preset bolt holes on the connecting plate 8 are arranged equidistantly at a certain interval, which is convenient for assembling different numbers and forms of tie bars 3 according to different engineering conditions. The tie bars 3 are made of angle steel.

[0028] The longitudinal reinforcement 5 and stirrups 6 are bound together to form a reinforcement cage, in which prestressed reinforcement 2 is embedded and arranged on both sides of the I-beam 1 .

[0029] Prestressed tendons 2 are embedded in advance in the I-beams of the column limbs, which improve the bending bearing capacity and rigidity of the column, and at the same time serve as a channel for cast-in-place concrete 4, enhancing the overall performance of the structure; under the constraint of the concrete 4, the out-of-plane stability of the steel structure plate on the compression side is greatly improved, thereby improving the utilization rate of the material and saving steel; in addition, the steel section can form a constraint on the concrete 4, and the two complement each other, so that the material of the utility model is fully utilized.

[0030] The utility model is manufactured using the following steps:

[0031] Step 1), all components are manufactured in a steel structure processing plant according to the above structure;

[0032] Step 2), opening bolt holes on the connecting plate 8 and the tie bar 3, welding the connecting plate 8 to the corresponding position of the I-beam (1), and then positioning and tying the steel bars;

[0033] Step 3), positioning and tensioning the prestressed tendon 2 in the middle (where);

[0034] Step 4), pour high-performance concrete, and cut off the excess part of the prestressed tendon 2 after the concrete curing is completed;

[0035] Step 5), transport the processed components to the construction site;

[0036] Step 6), at the construction site, the column limbs are positioned and fixed, and then the column limbs are connected to the tie bars 3 by high-strength bolts 7.

[0037] In general, the utility model has the characteristics of large bending rigidity, light weight, earthquake resistance, high material performance utilization and convenient construction compared with steel lattice columns. Prestressed tendons are embedded in the I-beams of the column limbs in advance, which improves the bending bearing capacity and rigidity of the column. Under the constraint of concrete, the out-of-plane stability of the steel structure plate on the compression side is greatly improved. The steel can form a constraint on the concrete, which improves the stress performance of the concrete while also reducing the amount of concrete.

Claims

1. A prestressed prefabricated steel lattice column partially covered with concrete, comprising at least: I-shaped steel (1), prestressed tendons (2), tie bars (3), concrete (4), longitudinal bars (5), stirrups (6), high-strength bolts (7) and connecting plates (8); wherein the I-shaped steel (1) and column limb concrete (4) form a plurality of column limbs, wherein the column limbs are connected to each other via tie bars (3), the I-shaped steel (1) is connected to a connecting plate (8), the connecting plate (8) and the tie bars (3) are both pre-set with bolt holes, and the lattice column can be assembled by means of high-strength bolts (7), the longitudinal bars (5) and stirrups (6) are tied together to form a steel cage, and the prestressed tendons (2) are pre-embedded therein, and are arranged on both sides of the I-shaped steel (1).

2. The prestressed prefabricated steel lattice column according to claim 1, characterized in that: Concrete (4) uses ultra-high performance concrete.

3. The prestressed prefabricated steel lattice column according to claim 1, characterized in that: The bolt holes preset on the connecting plate (8) are arranged equidistantly at a certain interval, so as to facilitate the assembly of tie bars (3) of different numbers and forms according to different engineering conditions.

4. The prestressed prefabricated assembled steel section covered concrete lattice column according to claim 1, characterized in that: The prestressed tendons (2) are four in total and are arranged in a straight line. The prestressed tendons (2) are constructed using a pre-tensioning method. After the construction is completed, the portions protruding from the concrete (4) at both ends are cut off.

5. The prestressed prefabricated steel lattice column according to claim 1, characterized in that: The tie bars (3) are made of angle steel.

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