CN209990016U

CN209990016U - Bolt-connected roof prefabricated combination beam

Info

Publication number: CN209990016U
Application number: CN201920289449.2U
Authority: CN
Inventors: 王志鑫; 白景柱; 赵茜娅
Original assignee: Binzhou University
Current assignee: Binzhou University
Priority date: 2019-03-07
Filing date: 2019-03-07
Publication date: 2020-01-24
Anticipated expiration: 2029-03-07

Abstract

A prefabricated roof composite beam connected by bolts is provided, aiming at the defects of poor overall performance, insufficient rigidity and poor anti-seismic performance of the traditional assembled structure, a novel composite beam form is provided. The combined beam is a section beam combining a steel structure and a concrete structure, and changes the connection mode of the original prefabricated components. The member is connected by bolts instead of welding, and is internally provided with I-shaped steel. In order to improve the bending rigidity of the beam, the prestressed reinforcement is tensioned in the tension area of the beam by a post-tensioning method. When concrete is poured, a part of the I-shaped steel is pre-extended out, and bolt holes are reserved in the I-shaped steel, so that the I-shaped steel can be conveniently connected and used at the joints of the structure.

Description

Bolt-connected roof prefabricated combination beam

Technical Field

The utility model relates to a cross-sectional form and the assembly method of bolted connection's prefabricated combination roof beam belongs to structural engineering technical field.

Background

Currently, with the development of modern industrial technology, building houses can be manufactured in batches and sets like machine production. The prefabricated house components are transported to a construction site to be assembled. Fabricated buildings have become of interest since the beginning of the 20 th century and have been realized through the sixties. The first attempts made in English, French, Soviet Union, etc. The assembly type building has high construction speed and low production cost, and is rapidly popularized and developed all over the world. The advantages of the fabricated building are: the template can be saved, the construction condition during manufacturing can be improved, the labor productivity can be improved, the construction progress can be accelerated, but the defects are serious: the integrity, rigidity and earthquake resistance are poor.

Disclosure of Invention

Based on the reason, the utility model relates to a cross-sectional form of prefabricated combination roof beam, its biggest characteristics utilize the prestressing force component that steel structural component combines reinforced concrete roof beam to act together. The member is integrally installed finally by adopting a bolt connection method, so that the welding method adopted after the original prestressed member arrives at the site is replaced, the defect of insufficient rigidity of the node of the fabricated building is overcome, the phenomena of incomplete welding seams, welding leakage and the like during welding can be reduced by adopting the bolt connection method, and the construction is convenient.

And the whole rigidity of the beam is improved when the steel structural members are combined from the aspect of rigidity, and the number of longitudinal steel bars is reduced when the beam is manufactured in a prefabrication factory. The post-tensioning method is adopted in the tension prestress steel timing of the component, and the operation is simple; the member can improve the integrity of the node and the rigidity of the beam under the condition of not changing the size of the prefabricated roof beam.

The technical scheme of the component is as follows: a prefabricated roof combined beam connected by bolts is made up of the I-shaped steel and concrete through binding the structural reinforcing bars in the beam, arranging prestressed reinforcing bars at the bottom by post-tensioning method, pouring concrete while making part of I-shaped steel leak from both ends and reserving the holes for connecting bolts.

The type of the I-shaped steel of the component and the type of the prestressed reinforcement are according to the national standard.

Drawings

FIG. 1 is a schematic cross-sectional view of the present bolted roofing precast composite beam;

FIG. 2 is an upright schematic view of the present bolted roofing precast composite beam;

fig. 3 is a plan view of the prefabricated roof composite beam connected by the bolt.

In the figure: 1. concrete, 2. I-shaped steel, 3. prestressed reinforcement and 4. constructional reinforcement.

Detailed Description

The core of the invention is to provide the bolt-connected roof prefabricated combination beam, which improves the material utilization rate, overcomes the defects of poor integrity and insufficient rigidity of the traditional assembled structure, overcomes the defect of inconvenient connection of prefabricated parts and enhances the strength of building nodes.

Referring to fig. 1-3, fig. 1 is a schematic cross-sectional view of the prefabricated roof composite beam connected by bolts; FIG. 2 is an upright schematic view of the present bolted roofing precast composite beam; fig. 3 is a plan view of the prefabricated roof composite beam connected by the bolt.

The invention provides a bolt-connected roof prefabricated composite beam, which comprises: i-shaped steel 2, concrete 1, prestressed reinforcement 3, construction reinforcement 4 and bolt connecting hole 5. The I-shaped steel 2 and the concrete 1 are main materials, the structural steel bars 4 are bound inside a beam, prestressed steel bars 3 are arranged at the bottom of the beam by adopting a post-tensioning method, the concrete 1 is used for pouring, when the concrete 1 is poured, part of the I-shaped steel 2 is leaked from two ends of the beam, and the bolt connecting holes 5 are reserved on the beam so as to be conveniently connected and used at the joints of the structure.

While the principles and embodiments of this invention have been described in detail using specific examples, it should be understood that various changes and modifications can be made by one skilled in the art without departing from the principles of the invention and these changes and modifications are within the scope of the invention as defined by the appended claims.

Claims

1. The prefabricated roof combined beam connected by the bolts is characterized in that I-shaped steel (2) and concrete (1) are main materials, reinforcing steel bars (4) are bound inside the beam, prestressed reinforcing steel bars (3) are arranged at the bottom by a post-tensioning method, and when the concrete (1) is poured, part of the I-shaped steel (2) is leaked from two ends of the beam, and bolt connecting holes (5) are reserved on the beam.