Improving stability of an ecological 3D-printed house -a case study in Italy

Purpose: The structure WASP'S GAIA house printed without beams and columns; therefore, it's not safe enough against earthquake or wind. Moreover, the structure printed layer by layer doesn't present a good stability for build other floor in seismic zones. The aim of this work is to study stability of this house and give new technique to improve stability of the ecological house printed in 3D. Design/methodology/approach: For resolving this problem we considered the structure printed in 3D is simulated with rammed earth characterized by a horizontaly striped and the basic principles of seismic justification are similar to unreinforced mansory, we use spectral analysis method in order to find a maximum displacement induced by a seismic excitation and robot structural analysis software to analyze the mechanical resistance of the studied structure. Findings: The center of gravity approaches the twist center, presented in the results, which prove a good stability of the structure when we use circular beams and columns fabricate with wood material. We carried out three analyses: A modal analysis with 4 vibration mode when the cumulative mass reaches 99.98%. A seismic analysis according to the moroccanearthquake construction regulations (RPS 2011). Use natural beams and culumns to improve the stability of a structure with one wall and two walls, in the case of with or without reinforcement can prove a good stability. Compromising between ecology, safety and technology. Increase the mechanical characteristics to increase safety and prevents collapse in the seismic zones. The possibility of exploiting our cultural heritage with the development of other complex design in the field of construction. Research limitations/implications: The possibility of exploiting our cultural heritage with the development of other complex design in the field of construction. Development the diameter of crane wasp 3D printer. Practical implications: Exploiting this technology in the case of a natural catastrophic (seism, inundation, pandemic) to build safe and ecological building in the seismic zones. Build safe schools in the poor area for children. Originality/value: Development the design of GAIA WASP printed in 3D with two walls and other zones to improve the stability of house. Add natural beams and columns made by wood or bamboo inside the house printed with one wall, and two walls. Study the stability of house to obtain the twist centre approaches to centre of gravity. We carried out three analyses: A modal analysis with 4 vibration mode when the cumulative mass reaches 99.98 %, a seismic analysis, and a spectral analysis of the maximum acceleration. ANALYSIS AND MODELLING-Development the design of GAIA WASP printed in 3D with two walls and other zones to improve the stability of house.-Add natural Beams and columns made by wood or bamboo inside the house printed with one wall, and two walls.-Study the stability of house to obtain the twist centre approaches to centre of gravity.-We carried out three analyses: A modal analysis with 4 vibration mode when the cumulative mass reaches 99.98 %, a seismic analysis, and a spectral analysis of the maximum acceleration.