The lecture hall is the most common type of classroom in universities. From the front seat to the back seat, the seats in each row are gradually raised. This design ensures that those sitting in the back are able to maintain a good personal vision and will not miss any of the wonderful details of the lecturer on the podium.

Yao Yayao sat in the middle six or seven rows, listening intently to the lecture of an associate professor and tutor above. This is a course on the History of Architectural Disasters and is a compulsory subject for all civil engineering students.

The entire large classroom was filled with nearly 200 people, making the classroom a bit crowded.

Yao Yayao is not very accustomed to this kind of super-large class group class mode, and it feels as if he is holding some kind of formal meeting, rather than a relaxed and harmonious class.

This kind of combined class mode is to gather several students of the same major into one classroom to take public classes. For example, students from different departments such as municipal engineering, civil construction, and water conservancy can take classes together.

Too many people in the same classroom often cause students to be easily distracted, and it is difficult for the professor to take into account the emotions of each student. But fortunately, the classroom is very quiet and the class is very orderly.

What Associate Professor Qian is teaching on the tutor stage is a real example of building collapse in China, an 18-storey small high-rise building in X City, which was littered with soil around it, resulting in a 90-degree angle dumping of the entire building.

"Newton's law of gravitation is at the heart of architecture. Accurate load accounting in the vertical direction is a key core part of any building's stable footing on the ground. At the same time, however, we should not ignore the shear forces in the horizontal direction, which can also seriously threaten the overall safety of the building. ”

"The reason why the building collapsed as a whole is that ignorance leads to fearlessness, and it is a lack of scientific attitude in cognition, which leads to the barbaric construction work of the construction unit。。。。。。"

Through on-site videos, pictures, and various handmade schematic drawings, Associate Professor Qian danced with his eyebrows, and at the same time told everyone about one of the famous architectural disaster histories in China with a sad expression.

Associate Professor Qian's lecture was very vivid, emotional, and infectious. Under his detailed explanation, the details of the various collapse processes and the specific process of the whole thing were presented with great precision. The students in the audience also listened with great interest and interest.

Yao Yayao spent most of his time listening intently, but occasionally he was distracted from looking at another book in his hand. It was the copy of "The Great Scam of the 922nd Century" that he had just bought. The shocking events recorded here are much more serious than those described by Associate Professor Qian: two skyscrapers nearly 110 stories high collapsed in their entirety, killing nearly 3,000 people.

Associate Professor Qian took consecutive classes, which means that he has taken two consecutive classes of the same class. During the recess, some students walked to the podium and asked Associate Professor Qian some questions about his own lectures.

Yao Yayao also walked to the podium, brought his own book "The Shocking Scam of the 922nd Century", and asked his own questions:

"Professor Qian, the 922 incident should be one of the biggest architectural disasters in human history! Why is it not included in the official content of the textbooks issued by the school? Can you tell us more about this incident? Is it just a hell of a hoax as the book in my hand says?! Can local softening of steel really cause the entire building to collapse? ”

Associate Professor Qian quickly and accurately answered the questions raised by the previous students. However, after hearing Yao Yayao's question and seeing the cover of the book in Yao Yayao's hand, he was obviously stunned on the spot, unable to speak for a while. He raised his forehead, staring at Yao Yayao with blazing eyes, his expression obviously surprised.

After a while, he said thoughtfully, half-groaningly:

"This classmate, you are right, the 922 incident is indeed a super-large emergency in human architecture. In terms of qualifications, it should indeed be included in the official textbooks of universities, but due to some non-public reasons, it has no choice but to be excluded. ”

"There are rules in the university that tutors at the level of associate professor and above cannot make official remarks about the 922 incident in public. So this student, I'm sorry, but I have to follow the rules of the school, so I can't teach you about this major building disaster. ”

"For first-year students, there are too many professional theoretical knowledge in the scientific examples of the 922 building collapse incident that you can't grasp for the time being. For example, the central structure of the double-tube support, the sleeve system of the steel frame, the failure of the comprehensive stress effect, the vertical instability, the heat conduction, and so on. You still need to take a lot of in-depth courses before you are suitable for studying a major accident of this level. ”

These concise answers did not satisfy Yao Yayao. He went on to ask:

"Why can't you tell us about such a major and popular event publicly?! Isn't there a university where academic freedom is the most respected? ”

Associate Professor Qian did not respond positively, stared at Yao Yayao for a few seconds, and then said:

"What is your name, this classmate? Which class? ”

"Yao Yayao, Department of Civil Engineering, 201903 class." Yao Yayao blurted out without thinking.

Associate Professor Qian picked up the pen, danced on a blank piece of paper, and wrote the titles of several books: "Theoretical Mechanics", "Mechanics of Materials", "Structural Mechanics", "Foundations of High-rise Buildings", "Thermal Conduction", "Introduction to Building Foundations". Then, he wrote down his name and a mobile phone number.

Then, he solemnly handed the piece of paper to Yao Yayao, and said with a serious attitude:

"Yayao, one of the spiritual tenets of the university is that if you have any questions about any point of view, you should try to break the casserole and ask for the final analysis. You need to be more active learners and don't wait for your mentor to impart perspectives to you. ”

"You should read these books first, and after you basically understand them, then you will have at least the qualifications to study the 922 incident!"

"If you don't understand anything while reading these books, I always welcome you to visit my private apartment and give you a face-to-face explanation."

At the end of the day, Associate Professor Qian's face had changed to amiable and kind. The tutor looked at Yao Yayao's eyes, and seemed to have a very appreciative look.

Yao Yayao took the paper a little dazed. He didn't expect his random question to end up like this. Several of the onlookers around were staring at him with envious, jealous and hateful eyes, as if they were envious of Yao Yayao's question, which actually won Associate Professor Qian's personal favor.

Yao Yayao just wanted to say something, but the bell of class echoed in the classroom, abrupt and sharp. So he had to thank Associate Professor Qian briefly, followed a few classmates off the podium, and returned to his seat.

In the next lecture time, Yao Yayao inevitably wandered often. The note given by Associate Professor Qian just now was mixed in his textbook by him.

He only knew one of the titles of the books in the note, which was "Theoretical Mechanics". This is one of the compulsory subjects for this new semester, and I have already taken several classes before and after.

This book is very thick, the theory of mechanics is more in-depth, and there are many difficult calculation problems. I heard from the senior brothers that it is said that this subject is one of the "obstacles" to the make-up examination at the end of the semester! Almost every year, there will be students who unfortunately fail in this subject!

The titles of the other books may be some of the required books for the next semester or the next semester, right? Do you want to buy it in advance? Yao Yayao was thinking.

What Associate Professor Qian said is not wrong, when I read the book "922 Shocking Scam" in the past few days, there are indeed a lot of architectural terms in it, and I don't know much about it, but I don't know why.

Associate Professor Qian's class content is still exciting, but Yao Yayao is a little distracted!

(To be continued)