On May 6th, the "Jianjian" on the 30th floor of Yuanda passed the 9-degree seismic test on the seismic test bench of the Chinese Academy of Construction Sciences, marking a new chapter in the history of human seismic technology.

Yuanda Group, famous for its technological innovation, invented "Kejian" in 2009. This is a factory produced building that saves several times more building materials and energy than traditional buildings, and has a longer service life, so it is called a sustainable building. Over the past two years, Broad has built 9 demonstration buildings in China and Mexico, including the 6-storey "Shanghai World Expo Grand Pavilion" completed in one day and the 15-storey "New Ark Hotel" completed in one week, which has attracted close to tens of millions of netizens and heated discussions on major websites around the world. This time, the 30-storey building that can be built successfully passed the national earthquake resistance test, which means that Broad has the ability to fulfill the plan to build 150 30-storey apartments, hotels, and office buildings this year.

At the site of this Asia's second largest building seismic test stand, journalists from CCTV, Reuters, Tencent, China News Network, and other media witnessed this historic moment.

Withstanding 42 earthquakes

In most regions of China, the national seismic fortification level for buildings is 6 degrees, with a seismic intensity of 0.05g, which is equivalent to a car hitting a wall at a speed of 0.5 meters per second.

Starting at 10 a.m., this 1:10 simulation model loaded with more than 30 tons of iron ingots at a true scale has undergone 42 tests of different levels and modes of earthquake conditions. By 5:00 pm, Kejian had successfully passed the "9 degree rare earthquake" test, with an acceleration of 0.6g, which is equivalent to a car hitting a wall at a speed of 6 meters per second. This data is a full 12 times higher than the seismic fortification standard for common areas in China. Now, all the experts and test engineers present are overjoyed. According to the test plan, this test has been successfully completed.

Heartbreaking 60 seconds

At this time, Zhang Yue, the president of Yuanda, who had been on the scene, pulled Professor Cheng Shaoge, the person in charge of the earthquake resistant laboratory of the Academy of Architectural Sciences, aside, and persuaded him to step up efforts to try another working condition. Professor Cheng, who has always been cautious, was moved by Mr. Zhang's perfectionist technical spirit and decisively decided on the spot to risk damage to the test bed, emphasizing the earthquake at 0.78g, and then testing a strength condition that has never been done in the history of human seismic research. Due to the lack of testing standards for rare earthquakes exceeding 9 degrees, this condition can only be referred to as "exceeding 9 degrees.".

The broadcast in the test hall shouted to the engineers and reporters at the scene to stay away from the test stand to avoid falling down or flying iron ingots that could hurt people. The people retreated 20 meters away and held their breath.

With the huge roar of the test bench, the test bench carried the building back and forth violently, causing the entire building to form a sharp S-shaped deformation scene from top to bottom. The upper section is large in S-shape, and the lower section is small in S-shape. The 20 to 30 story building has swung about dozens of times, while the bottom section has swung more than 6000 times.

And this 6000+round trips occurred in just 60 seconds!

Worry about earthquakes

The earthquake stopped, and dozens of excited experts, engineers, and reporters crowded in. People walked around the 30 floor building and carefully inspected it. They found that none of the columns, slant support and beams were damaged. People talked about it and became more excited. At this time, the reporter found that the engineers from Yuanda were not particularly excited. After questioning, he realized that Yuanda hoped to continue testing with higher intensity until the building was damaged. The vibration capacity of this Asia's second largest seismic test rig has reached its peak.

The reporter later learned that Yuanda's perfectionistic concept of earthquake resistance stems from their concern about the possibility of strong earthquakes around the world at any time. "We learned a set of data from experts and gained an intuitive understanding of the power of earthquakes.".