The tower was designed to swing somewhat in the wind, but the sun has a greater impact. As the sun-facing side of the tower warms up, the top slides away from the sun by up to 7 inches (18 cm). The sun also causes the tower to expand by around 6 inches. These movements are not nearly enough to be noticeable by people on the ground.
The tower is operated by the army corps of engineers. They use computer controls to regulate the speed at which it rotates, depending on the wind speed and direction. The mechanism works because the weight of the top section forces the base section to turn slowly, like a clock hand. If the wind is strong, more parts of the tower will be swinging, so the movement of the whole structure is less dramatic.
People have been afraid of the Eiffel Tower since it was first built. In 1889, a man died after he was thrown off the tower for fear of being kidnapped by aliens. In 1969, another man died when he fell from the tower after hearing strange noises above him. In 2009, a 36-year-old woman died when she was hit by a falling lamp-post while trying to take a picture of herself with the tower in the background.
The number of visitors to the Eiffel Tower has increased every year since it opened. In 1989, about 9 million people visited the tower. This rose to 10 million in 1990 and 11 million in 1991.
The side of the tower that faces the sun at any time of day has been reported to shift up to 18 cm away from the sun due to thermal heating as the metal expands and pushes against the cooler metal on the opposite side. The Eiffel Tower has been known to shift its position even with respect to the stars!
Heating causes problems for many structures, including buildings, bridges, and highways-aluminum tends to melt when it reaches 120 degrees Fahrenheit (49 degrees Celsius), so the Eiffel Tower uses steel instead. But even a structure made entirely out of steel would get hot in the Sun if it were not supported by something else. The Eiffel Tower is suspended about 70 meters (230 feet) above Parisian streets, so it doesn't touch the ground; instead, an iron framework supports it from the ground up. This keeps it free to move in response to heat expansion and contraction without damaging its elegant design.
In addition to its apparent movement toward the sun each day, the Eiffel Tower also shifts back toward the sun every night. Engineers used this fact when they designed the tower: they realized that if the tower were fixed in one place, it would be exposed to extreme heat during the summer months and severe cold in the winter. So they created a system where the tower can move apart from itself at night and come back together again in the morning.
The wind's center of action is placed at a height of 216 866/2 554 = 84.9m above the supports in the first hypothesis, and at a height of 215 388/2 185 = 98.55m in the second. As the efforts are known, we are now examining the influence on each section of the skyscraper. The mass of each section is given by its volume times its density. For the first section, the volume is equal to that of a cylinder whose radius is 1250mm and height is 665mm. The density is then simply the mass divided by the volume, which gives us 1.95kg per liter. For the second section, the volume is that of a cone with a base diameter of 2000mm and height of 665mm. The density is then simply the mass divided by the volume, which gives us 2.07kg per liter.
Now, let's look at the forces acting on each section. The weight of the first section is just over 93kN, so this is enough force to lift it off the ground. However, since it is attached to another section, this means that all of its weight must be taken up by the second section. Thus, the second section must be able to support 93kN plus an additional 10kN due to the effort exerted by the wind on the first section. This gives us a required minimum area of 103m2 for this section!
Heat generates an increase in volume, which causes the Eiffel Tower to rise a few inches. As a result of its growth, the tower tilts slightly away from the sun. The sun only shines on one of the four sides of the Eiffel Tower, producing an imbalance with the other three stable sides, leading the Eiffel Tower to tilt. The amount it tilts is very small, about 1 degree.
The Eiffel Tower was built as a monument to the French industrialist and engineer Gustave Eiffel. It is located in the Champ de Mars section of Paris, France. The first pillar of the Eiffel Tower was put into place on June 30, 1889. The entire structure was completed eight months later on March 31, 1890. In total, Georges-Eugène Eiffel created 12 steel framework structures for the monument; each one is thinner than a pencil and longer than a city bus. The overall size of the Eiffel Tower is 120 meters (394 feet) high and 70 meters (230 feet) wide.
The interior of the Eiffel Tower is open to the public, including the observation deck at the top. There are several shops and restaurants at the base of the tower that sell food and drinks. Visitors can also buy souvenirs and various types of jewelry made from Eiffel Tower metal.
In conclusion, the Eiffel Tower leans slightly toward the sun because of heat expansion.