Quebec Bridge, 1907. -This bridge should have been a truly valuable and immortal masterpiece of Teodoro Cooper, a famous American designer. Cooper once called his design "the best and most economical". Unfortunately, it doesn't hold water. Cooper was so absorbed in his design that he forgot to increase the length of the bridge from 500 meters to 600 meters, making it the longest bridge in the world at that time. The construction speed of the bridge is very fast and the construction organization is perfect. Just as the investors who invested in the bridge began to think about how to cut the ribbon for the bridge, people suddenly heard a deafening noise-the whole metal structure of the bridge collapsed: 19000 tons of steel and 86 bridge builders fell into the water, only 1 1 people survived. Cooper's overconfidence neglected the accurate calculation of bridge weight, which led to the tragedy.

When calculating the bridge, the checking calculation of wind load is ignored. After the bridge was completed and opened to traffic, it was found that the deck was often distorted, so MIT was entrusted to inspect it. MIT made an original bridge model and carried out wind load test. It was found that the direct cause of deck distortion was wind load, so MIT spent six days on another perfect design, and opened some holes in the side of the main girder of the bridge to reduce the influence of wind load. Unfortunately, this plan has not been implemented, and the bridge deck has been severely distorted and passed through the end of the bridge. It is impossible to drive on the bridge deck. With the help of relevant rescuers, the owner was out of danger and soon the bridge was completely damaged. The school that designed this bridge bought all the scrap steel of the bridge and made it into a school emblem, warning our students to remember this lesson forever.