Opening roads in the mountains and building bridges in the water is the "hard-core romance" of a major infrastructure country. But few people know that if you want to ensure the health of the bridge, you also need regular "physical examinations" by "health care doctors".
Deng Yang, a young professor at the School of Civil and Transportation Engineering of Beijing University of Civil Engineering and Architecture, has been specializing in the monitoring and evaluation of engineering structures for more than ten years, and he uses cutting-edge technologies such as data analysis, artificial intelligence and automatic monitoring to provide scientific "physical examination" for large bridge structures.
How to closely combine the solid promotion of professional high-quality construction with the study and implementation of the socialist thought with Chinese characteristics in the new era, adhere to the problem-oriented, in-depth investigation and research, and effectively transform the research results into practical measures to solve problems and improve work?As a teacher, Deng Yang believes that it is not only necessary to pay attention to students' scientific research ability, but also to let students have questions and answer questions during field visits, so as to grow into future-oriented architectural technology professionals. In the process of overcoming one problem after another, Deng Yang and his classmates faced the problems, solved the problems, and thought about new problems, and kept walking to explore the way for the growth of architects in the new era.
"Pulse" the bridge at an altitude of 60 meters
Do large bridges need 'health care doctors' too?This is a question that many students ask Deng Yang after they enter the school. In fact, complex and large structures such as stadiums and airports require health monitoring and condition assessment.
Large-scale bridges have large scales, many components, and complex structures. In the process of service, it will be subjected to a lot of external loads, and the service performance of its structure will produce some deterioration. "Health doctors" need to use some technical means to perceive the real state of the bridge in the process of service.
Our main approach is to place sensors on bridges and buildings, collect and analyze data, and evaluate their true condition. After years of monitoring and accumulation, a large amount of monitoring data will be formed, and we will combine structural mechanics, reliability theory, design methods, etc., to let the data 'speak' and reflect the state of the bridge structure. Deng Yang explained. This work guarantees the safety of the occupants, as well as the safety of the structure itself.
To obtain first-hand data, on-site collection is essential. In order to measure the bridge data, Deng Yang often carried ladders and set up data collectors with his students, and worked for several days to complete the task.
Deng Yang still remembers that when he first joined the work, he took his students to monitor a continuous steel bridge on the Xuyong-Gulin Expressway to ensure that the bridge closed smoothly and accurately. "When I arrived at the site, I got on the construction elevator and drilled into the pier, and in the last ten meters, I needed to climb the ladder on foot. Deng Yang said.
It was winter, the wind was biting, and the piers were about sixty or seventy meters high, equivalent to the height of a building with more than 20 floors. In the end, overcoming his fear, Deng Yang led the students to successfully complete the data monitoring task. "It was this painstaking monitoring that ensured that the bridge was safe and secure, and to this day, these devices continue to deliver vital data for bridge evaluations and for the safety of pedestrians. Deng Yang said.
At the same time, through arduous monitoring, a consensus has also taken root in the hearts of the students: innovation is not a "pat on the brain" to come up with an idea, it needs to go through a series of scientific and rigorous research demonstrations.
There is a popular saying in the bridge industry: bridge construction looked at Europe and the United States before the 70s of the 20th century, Japan in the 90s, and China in the 21st century. The level of large-scale bridge construction is the embodiment of a country's comprehensive national strength, and many bridges erected between the valleys have greatly improved the travel conditions of the people in the mountainous areas and truly changed the appearance of the countryside. Along the "Belt and Road", large bridges are standing, which also demonstrates the strength of "Made in China".
Today, the research results of Deng Yang and his team have been applied to many bridges such as the Runyang Bridge suspension bridge and the Sutong Yangtze River Bridge. "We hope that our research results can continue to solve the actual 'pain points' in engineering, so that every innovation can be better applied to engineering." Deng Yang said.
Starting from practical problems, let science and technology empower the protection of ancient buildings.
I often tell my students that as civil engineers, we have to overcome the fear of working in all kinds of difficult environments. Solve difficult problems through investigation and research. Deng Yang told reporters, "I hope that in the process of solving practical problems, we will cultivate architects with technology, ability and feelings." ”
Beijing University of Civil Engineering and Architecture is a university with a long history of research on architectural heritage conservation. When doing a "physical examination" for the bridge, Deng Yang often thinks about how to enhance the ability of independent innovation and apply these mature monitoring technologies to more buildings
Located in Shuozhou, Shanxi Province, Yingxian wooden tower, no nails and no riveting, towering for thousands of years, is the oldest and tallest wooden tower in the world. Compared with other similar towers, it has the most types of structures, the most complete and the largest volume. "If we can make achievements from the structural protection technology of the wooden tower in Yingxian County, it will also provide strong technical support for the protection of other ancient buildings. Deng Yang thought.
At present, the second batch of theme education is being solidly promoted, and the School of Civil and Transportation Engineering of Beijing University of Civil Engineering and Architecture makes full use of the effective practices and successful experiences of the first batch of theme education to reflect the effectiveness of theme education in teaching work. In response to the lack of practical experience of the students, Deng Yang took the students to Shanxi to pack their backpacks and go to Shanxi to investigate the wooden tower structure in Yingxian County on the spot, and reflect the service status of the ancient buildings through the monitoring data, so as to truly find out the situation, find out the problems accurately, and put forward practical countermeasures, so as to provide suggestions for the protection of ancient buildings.
Unlike bridge monitoring, the wooden tower cannot be equipped with sensors" or even wires, and can only be monitored by non-contact ......After the field trip to the wooden tower in Yingxian County, the students discussed enthusiastically at the discussion meeting. Different from modern building structures, the damage of ancient buildings is often irreversible, which requires the optimization of monitoring technology and the adjustment of equipment according to local conditions, in line with the principle of "minimum intervention", to protect the original value of ancient buildings.
In the end, the teachers and students thought of using an artificial intelligence-based machine vision technology to use cameras to respond to monitoring data at multiple points to realize the monitoring and identification of power characteristics. In practice, this method is very suitable for monitoring tall timber buildings. Based on the research results, under the guidance of Deng Yang, the students have tailored monitoring plans for the Wooden Pagoda in Yingxian County, Yungang Grottoes, and Pujindu Ancient City, and submitted them to the project leader.
With the 'eyes' of going deep into the grassroots, the students strive to analyze China's problems in the broadest land of China, adapt measures to local conditions, and cutting-edge technologies can also serve the protection of ancient buildings, which gives students a new understanding of the connotation of 'innovation-driven development'. I am very pleased that the students have participated in major projects, solved key problems, accumulated scientific research experience, better understood the national conditions and the world, and enriched the growth dimension. In the future, it is expected that more young people will devote themselves to the scientific research of building structures. Deng Yang said.
Director: Jin Rui.
Producer: Wang Hai.
Chief Planner: Yang Yue, Wei Chuyuan, Gao Lei, Zhang Yuanyuan.
Planner: Wang Yang, Wang Boliang, An Li.
Reporter: An Li.
Editor: Wang Boliang.
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