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Midair multipoint vertical steel bar connecting joint and construction method thereof

A technology for connecting nodes and steel bars, which is applied in the direction of connecting components, threaded fasteners, nuts, etc., can solve the problem that the straightening performance of steel bars cannot meet the requirements of pre-embedded components, and the upper and lower steel bars cannot be connected by butt joints. House structural safety and earthquake resistance and other issues, to avoid excessive pitting corrosion, simple and practical construction methods, and solve the problem of multi-point docking in the air

Active Publication Date: 2014-03-26
TIANSHUN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Due to the limitations of my country's national conditions and special geological and seismic zone conditions, the introduced joint technology often cannot meet the requirements of my country's concrete structure codes, which is manifested in the high The cost of strength mortar is too high, the quality of construction welding is uneven, and the amount of steel reinforcement is often increased in consideration of earthquake conditions; , due to the brittle fracture of the prestressed steel bars, the sudden toppling of the column caused a major safety accident
[0004] my country's concrete structure code has made restrictions on the use of unbonded prestressed steel bars; for example, the joints of European prefabricated components are treated with pre-embedded steel bars-mechanical connections or welding-closed mortar, but there is a straightening performance of steel bars in my country. It cannot meet the pre-embedded requirements of prefabricated components, often when the overall assembly of the house occurs, the upper and lower steel bars cannot be connected at the same point, and the safety and earthquake resistance of the house structure cannot be achieved, which also limits the large-scale promotion and application of this technology

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  • Midair multipoint vertical steel bar connecting joint and construction method thereof
  • Midair multipoint vertical steel bar connecting joint and construction method thereof

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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the multi-point vertical steel bar connection node in the air provided by this embodiment, the raw material of the steel bar connection node is No. 45 round steel, and the chemical composition of the round steel is C: 0.38%, Cr: 1.1%, Mn: 0.75%, Mo: 0.25%, Si: 0.21%, S: 0.025%, P: 0.03%, N: 0.025%, the balance is Fe;

[0034] The manufacturing process of multi-point vertical steel connection nodes in the air is as follows:

[0035] Step (1): Send the above raw materials into the heating furnace to heat up to 1160°C, and draw them into steel rods of required size;

[0036] Step (2): The steel bar heated in step (1) is rapidly cooled to 610°C through the first online cooling process, and then quenched with water or quenching liquid in the quenching device for 11-13 seconds. Then it is heated to 600°C and tempered in a tempering furnace, and after straightening treatment, it is cooled to room temperature through the second cooling process;

[...

Embodiment 2

[0042] This embodiment provides a multi-point vertical steel bar connection node in the air. The raw material of the steel bar connection node is No. 45 round steel, and the chemical composition of the round steel is C: 0.43%, Cr: 0.9%, Mn: 0.85%, Mo: 0.2%, Si: 0.3%, S: 0.013%, P: 0.015%, N: 0.012%, and the balance is Fe;

[0043] The manufacturing process of multi-point vertical steel connection nodes in the air is as follows:

[0044] Step (1): Send the above-mentioned raw materials into the heating furnace to heat up to 1180°C, and draw them into steel rods of the required size;

[0045] Step (2): The steel bar heated in step (1) is rapidly cooled to 630°C through the online first cooling process, and then quenched with water or quenching liquid in the quenching device for 11-13 seconds. Then it is heated to 660°C and tempered in a tempering furnace, and after straightening treatment, it is cooled to room temperature through the second cooling process;

[0046] Step (3): ...

Embodiment 3

[0051] This embodiment provides a construction method for multi-point vertical steel bar connection nodes in the air, and the specific processing is as follows:

[0052] Before construction, the outer surface of the butt end of the pre-embedded steel bar is processed into a threaded mechanical connection thread structure, and the threaded mechanical connection thread matches the internal thread mechanical connection thread in the groove at one end of the connection node. During assembly:

[0053] First, align the butt end of the pre-embedded steel bar with the groove at the end of the connection node, and securely cooperate with the threaded mechanical connection screw to ensure that the angle of the connection node and the pre-embedded steel bar are even;

[0054] Then, select the required length of finished rolled rebar with a trapezoidal thread at an angle of 82-84 degrees and press it into the groove along the direction perpendicular to the groove on the other end face of t...

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Abstract

The invention discloses a midair multipoint vertical steel bar connecting joint which is made of number 45 round steel. The round steel comprises the chemical components, by weight, 0.38-0.43% of C, 0.8-1.1% of Cr, 0.75-1.0% of Mn, 0.15-0.25% of Mo, 0.15-0.3% of Si, 0.035% of S, 0.035% of P, 0.035% of N, and the balance Fe. The invention further discloses a construction method of the midair multipoint vertical steel bar connecting joint. The midair multipoint vertical steel bar connecting joint and the construction method thereof are simple and practical, simple in construction and capable of greatly improving the strength, the toughness and the tension stress of the steel bar connecting joint.

Description

technical field [0001] The invention relates to a multi-point vertical steel bar connection node in the air and a construction method thereof. Background technique [0002] At present, in the process of housing construction at home and abroad, a building-integrated prefabricated component is being widely used, and it has developed rapidly relying on the advantages of saving time, labor and cost. In China, some large-scale prefabricated component factories Relying on the introduction of joints and construction technologies from Australia, the United States and Europe, Fang has successfully applied them to the construction of prefabricated houses. Meet the seismic requirements of the column joints of the upper and lower floors of the building. [0003] Due to the limitations of my country's national conditions and special geological and seismic zone conditions, the introduced joint technology often cannot meet the requirements of my country's concrete structure codes, which i...

Claims

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Application Information

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IPC IPC(8): F16B37/00B23P15/00C22C38/22
Inventor 姚圣法吴海洋
Owner TIANSHUN GROUP
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