Chinese researchers have completed seismic testing on a scaled-down 3D-printed concrete house model at the Institute of Engineering Mechanics in Hebei province. The tests aimed to evaluate the earthquake resistance capabilities of 3D-printed construction, using a sophisticated six-degree-of-freedom shaking table that can simulate various seismic conditions.
Researchers mark cracks on the 3D-printed house model at the experiment site. (Image Credit: Photo/Kang Pu)
The test model, measuring five meters in length and just over one meter in width, was equipped with multiple monitoring devices including acceleration sensors, strain gauges, and ultra-high-speed cameras capable of capturing 3,000 frames per second. The research team, led by associate professor Sun Xiaoyan from Zhejiang University, collaborated with Hangzhou Lingtong Technology Co., Ltd. to assess the structure’s performance.
Results showed the model withstood a level 6 intensity earthquake without structural damage. At intensity levels 7 and 8, the structure developed cracks but maintained overall stability. Even when subjected to a level 9 intensity earthquake, which caused complete cracking, the core structure remained intact without collapse.
The testing aligns with China’s established principles for earthquake-resistant construction, which specify different performance requirements for minor, moderate, and major seismic events. According to He Huanan, associate professor at Dalian University of Technology, buildings should remain undamaged in minor earthquakes, sustain repairable damage in moderate earthquakes, and avoid collapse in major earthquakes.
“The future of 3D-printed houses is promising,” said Sun Xiaoyan, noting that these structures offer advantages in construction speed and precision through digital design. However, the technology still requires additional professional certification and practical testing before wider implementation.
Source: english.people.com.cn