용접 이형 철선을 사용한 슬래브의 휨성능 및 사용성 평가 = Flexural performance and serviceability evaluation of slab

다국어 초록 (Multilingual Abstract)

The modern construction market is in various difficult conditions such as a lack of professional construction personnel, an increase in labor and material costs, and environmental regulations.
As a result, there are serious problems such as an increase in construction costs and a relative decrease in productivity, and many problems such as occurrence of safety accidents and poor reinforcement construction have been reported during field work. As a solution, it is emerging as an efficient way to reduce labor costs and shorten air by using a structural welding wire mesh (WF) that minimizes field work, has a constant rebar spacing, and simplifies the on-site reinforcement process.
In addition, in Korea, a series of studies have been conducted on "rebar pre-assembly methods with structural welding nets" in this context to ensure precise assembly based on accurate background construction and standardized processing.
The structural welding wire mesh is a type of pre-assembly steel bar manufactured by electrical resistance welding the intersection point by arranging horizontal and vertical wires at right angles, and is manufactured using cold and surface-processed steel wires.
Through this process, it is reported that the structural welding wire has high yield strength, but the elongation compared to the release reinforcement is lowered, which can lead to a decrease in the elongation of the member.
In addition, while the yield section is not clear due to the characteristics of the iron wire itself and the adhesion stress is lowered due to the shape characteristics, strain localization may occur due to high acupressure characteristics due to the iron wire welded in the orthogonal direction. Research cases have also been confirmed that this characteristic leads to brittle destruction mode of the member due to fracture of the tensile steel wire.
This research aims to determine the characteristics of materials and the adhesion performance between release steel wire and concrete using a welding wire to verify the problem and solve the problem, and to verify the structural performance when applied to structural members.