Researchers are now earthquake-testing 3D-printed structures.
The University of Bristol announced a project to perform a shaking table test for a 3D-printed concrete structured produced using 3DCP technology.
Shaking tables are traditionally used to investigate the robustness of structures under earthquake conditions. Structures are subjected to vibrations of controlled frequencies, ranging from minor to violent. The goal is to determine at what point the structure fails, often testing new approaches to earthquake protection technology.
Here, however, they are testing a straightforward 3DCP structure: a typical 3DCP building including door and window ports, overhangs, but without roof or other attachments. In fact, they tested only the 3DCP-produced concrete structure.
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The University of Bristol explains how the test proceeded:
“The unit was then subjected to a series of increasing intensity ground motion records, starting with low-intensity vibrations and progressing to stronger, potentially damaging inputs. Each test sequence was carefully monitored and recorded, allowing for real-time assessment of the unit’s behaviour, including cracking, displacement, and potential failure points. The data collected will be used to evaluate the structural resilience of the 3D-printed unit, compare performance to traditional construction methods, and validate computational models that predict seismic behaviour.”
They’re performing this test because it appears 3DCP structures have never undergone this type of testing, and they wanted to fill that knowledge gap.
It appears the research paper for the project has not yet been released, but when it is published it should be of considerable interest to 3DCP companies. The data produced could enable 3DCP managers to consider taking on projects in earthquake-prone zones. However, those regions typically have significant building codes and practices, and it’s unclear how much work it will be to integrate 3DCP technology.
Nevertheless, this research is an important first step towards wider use of 3DCP technology in the construction industry.
