Anti-seismic technology of ancient buildings in earthquake archaeology

In ancient China, people accumulated a lot of advanced earthquake defense, forecasting technology and knowledge at that time and even in modern times. For example, as early as A.D. 132, Zhang Heng of the Eastern Han Dynasty invented the world's first instrument for detecting earthquakes-the waiting wind seismograph.

Many ancient buildings in China have summarized and used some measures to prevent earthquake disasters, showing excellent anti-seismic structure and performance, and achieved good results. For example, the wooden pagoda in Yingxian County, Shanxi Province is the first batch of national key cultural relics protection units. After nearly a thousand years, it has withstood the test of countless earthquake disasters.

Experts analyzed the seismic performance of the wooden tower, and found that: firstly, the foundation of the tower is firm, the underground soil structure is dense and stable, and the depth of the column root is kept on the same plane, so that the settlement is uniform. Adding a stone foundation on the pile foundation, first square, then octagonal, is quite stable: the ratio of tower height to foundation range is 2: 1, which is beneficial to the stability of wooden tower; As for the tower body, the overall structural proportion is appropriate, and the octagon is very stable. The attic-style building is a frame structure with internal slots and columns in the middle, which plays a stabilizing role. There are four groups of hidden buildings in the outer trough of the five-story pavilion, and then diagonal braces are added. Full-tower wood structure has the seismic advantage of "beam frame tenon and mortise" structure of China ancient building.