Use of Nitinol-Shape Memory Alloy in the Reinforcement of 3D Concrete Printing Industry (2022-11)¶

3D concrete printing method in structures with respect to its numerous benefits such as being faster, cheaper, safer, eco-friendly and also its ability to print complicated shapes will be the dominant constructing method in future of the construction industry. One of the challenges which this method should overcome to reach this position is to show an acceptance structural behaviour against applied loads, especially seismic loads. In conventional structures, steel bars, stirrups and meshes are also used to help concrete to increase its tensile, shear and flexural capacity; These materials are in 3D concrete printing industry, too. Setting up experimental studies always are not possible due to some factors such as, lack of special materials, cost effects, time consumption of a real experiment and etc. Software simulations are suitable options in order to be replaced with experimental studies in some cases. In this study, we are going to use ABAQUS finite-element software and explain the path of simulation in the study of reinforcement of 3D concrete printing. To evaluate the result of software simulations, an experimental study in the in-process reinforcement of 3D concrete printing was selected. The model, was made in ABAQUS finite-element software with the same characteristics. Path of making the model, properties and load conditions are explained. After analyzing and verifying our model with the related experimental study, a new reinforcement material, nitinol shape memory alloy is proposed.The model was analyzed with the new material and results were compared. At the end of this study, we will see that software simulations have potential to prevent spending too much time and costs in some cases and reliable results will be presented