Abstract
Purpose. One of the main technological operations of buildings construction on the basis of monolithic frame systems is the production of mesh reinforcement. The current interest is the new ways specification of advanced bonding armature techniques without reliability weakness and design of the building in whole, as well as the finding of use prospects of screw-threaded joint of armature as the most technological and economic method of re-bars joints. Methodology. Advantages and disadvantages analysis of existing rebar compound technologies was implemented by couplings of different types and constructions. The most promising vertical constructions for the vertical bars joints in frameworks were determined. Findings. Researches of existing technologies of rebar joints by the couplings of different construction were carried out. The installation method of mesh reinforcement of vertical structural elements with the use of the special catching devices was developed. It allows considerably accelerating installation of mesh reinforcement. Originality. Regularity of labor intensiveness change of mesh reinforcement installation of columns at armature joint in vertical position by threaded couplings with the help of catching devices using special construction was determined. This allows substantially reducing the labor expenditures during installation of these elements. Dependency of labor intensiveness and cost of lap welding armature joints, by tub-seam welding and by thread coupling depending on its diameter was designated. Regularity of labor intensiveness changes of installation at armature joints by different methods taking into account preparatory works was defined. Practical value. The analysis of mechanical armature joints techniques was conducted. It will allow selecting methods of armature joints to increase the speed of construction works more economical and effective.
Highlights
Using statistical analysis of buildings and structures in Ukraine it is found that one of the structural types of construction projects are monolithic frame systems.One of the main technological operations constructions of these buildings is the production of mesh reinforcement
In case of installation error it is necessary to destroy the joint elements with the possibility of armature damage; – during crimp of couplings there is a need to use a hydraulic press or other crimp device
There is a variant of a threaded armature joint with tapered thread, both on the bars and couplings
Summary
Using statistical analysis of buildings and structures in Ukraine it is found that one of the structural types of construction projects are monolithic frame systems.One of the main technological operations constructions of these buildings is the production of mesh reinforcement. In case of installation error it is necessary to destroy the joint elements with the possibility of armature damage; – during crimp of couplings there is a need to use a hydraulic press or other crimp device. The advantages of this method are as follows: – the use possibility of a joint for armature of any class; – high speed of elements installation; – authors have declared high reliability of a joint; – setting accuracy of the bars in to the vertical position of the project is not critical, since while screwing the coupling, displacement of bars on height and more accurate positioning occur (using couplings with many-sided thread).
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