DESIGN AND MANUFACTURE OF ARCHES WITH REINFORCEMENT USING 3D PRINTING

Abstract

The purpose of the study is to design and manufacture a reinforced concrete arch structure in a production environment using the 3D printing method.

The objective of the study is to design the structure of a reinforced concrete arch with a tightening and develop a technology for its manufacture, taking into account reinforcement in production conditions using a construction 3D printer and predict the possibility of further measurements of the deformation of concrete and reinforcement during experimental studies.

The article describes the technology for manufacturing reinforced arches using 3D printing using a construction printer from the Ukrainian company 3D TECHNOLOGY UTU LLC. The materials and geometry of the obtained prototypes are described. The span of the designed arched structure was 1500 mm, and the lifting boom was 750 mm. The cross-sectional size of the arch is 120x55*(h) mm. According to the manufacturing technology, the cross-section of the arch consists of six layers measuring 55x20 mm each. The arch is reinforced with 2 frames. The longitudinal lower and upper rods of the frame were made from VR-1 class reinforcement, with a diameter of 5 mm. Transverse reinforcement made of VR-1 class reinforcement with a diameter of 5 mm is welded by resistance welding to the longitudinal reinforcement with a pitch of 50 mm.

The dimensions of each of the two arch supports are 190x100(h) mm. In the middle of the arch supports, in the middle, during the printing process, embedded parts are made from pipes with a diameter of 10 mm for the further possibility of tightening in the arch.

The developed technology for manufacturing reinforced arches using 3D printing using a construction printer makes it possible to obtain high-quality structures that can be used both in real construction and for scientific experimental research. Reinforced arched structures were designed taking into account the characteristics of work under load and manufacturing technology.

Using a construction printer and 3D printing technology, reinforced arch structures were obtained that correspond to pre-developed design solutions and were manufactured according to a separately developed technological sequence.