International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 07 | Jul 2023
p-ISSN: 2395-0072
www.irjet.net
Structural performance of 3D printing RC beams using internal and external strengthening methods Amina Sherief1, Athira Suresh2 1 Student,Dept. of Civil Engineering,ICET Mulavoor ,Kerala,India
2 Asst. Professor, Dept. of Civil Engineering, ICET Mulavoor,Kerala,India
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Abstract
path and piled on top of one another to build a building using 3DCP technology. Therefore, it is difficult to add vertical reinforcement in printed concrete walls. Additionally, printed plain concrete walls are fragile, have a low ultimate bearing capacity, and have a low level of crack resistance. However, in order to meet the requirements for buildability, the workability and compaction of 3D printed concrete must be restricted to a lower level .
In this project 3D printed beams provided with internal and external strengthening methods were analyzed with the assistance of ANSYS software and its findings are compared to achieve the better version of such beams. Validation is completed and is successful. After the validation models of strengthened 3D printed concrete (3DPC) beams were produced and results are compared with reinforced concrete beams. High strength wires are utilized for internal strengthening purpose. These wires were organized in numerous patterns and are analyzed to find out the better combination. External strengthening of 3DPC beams with steel plates installed on both sides of beams are also assessed. Beams with varying plate thickness and bolt arrangement patterns are explored.
Although a number of 3DPC reinforced technologies seem promising, they are still in their infancy and principally require more adaptability to automatically construct vertical and horizontal components that adhere to the necessary international building standards. The mechanical behaviour of reinforced 3DcP members should, theoretically, be the same as that of conventionally constructed ones because the addition of steel reinforcement makes up for the concrete's relatively low tensile strength and flexibility. To take the 3D printing process into account, the design concepts and models must be carefully reviewed. The shape-related mechanics, anisotropy, thin interfacial layers, potential sliding, and a weaker link between the concrete and steel are some examples of this.
Key Words: 3D printed concrete beams (3DPCB), internal strengthening, external strengthening, high strength wires.
1.Introduction Among the additive manufacturing (AM) techniques for concrete now in use, three-dimensional concrete printing (3DCP) technology seems to have attracted the most interest due to its general technological level and demonstrated profitability. The development of 3DCP technology has led to the implementation of typical demonstration projects. 2015 saw the printing of an 11 m long, 5 m wide, and 4 m high concrete structure by the Eindhoven University of Technology. In 2016, a 3DCP office located in Dubai also started operating. China Construction Second Bureau LTD produced a two-story, 7.2 m tall office building in 2019. Instead of employing printed concrete components to create the office building, 3DCP was used on-site, in-situ. A concrete pedestrian bridge was printed by the Institute of Advanced Architecture.
When a 3D printer receives the data it needs to print, the machines start to overlay material levels in the appropriate places. This can be done using a variety of materials, the most popular of which being a blend of sand, fibre, geo polymers, and concrete. The strengthening technique used when concrete is used as a material for 3DP is crucial for enhancing its mechanical qualities. Despite the growing interest and knowledge of extrusion 3D concrete printing technologies, there is still a significant overall constraint with regard to successfully adding reinforcement in the 3DPC process. Despite the growing interest and knowledge of extrusion 3D concrete printing technologies, there is still a significant overall constraint with regard to successfully adding reinforcement in the 3DPC process. Thus 3D printing technology has many applications in the civil engineering field.
However, there are numerous difficulties in using 3D printed concrete buildings in actual technical applications. With a high resistance to compression and a weak resistance to tensile and flexural pressures, concrete is a typical quasibrittle material. AM is a good application for concrete. Its strengthening method must be carefully considered in order to improve its mechanical properties. Freshly mixed concrete is extruded from the nozzle along a predetermined
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1.1 Advantages of 3D printing technology 3D printing technology ensures lower construction costs. It ensures shorter construction period. More diverse design shapes can be made and no form works are required during construction.
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