As a landmark building in the UAE, the Burj Khalifa is equipped with 57 elevators.

The main reason for this is to alleviate the pressure that the Burj Khalifa has to face when facing transportation, because although the Burj Khalifa is said to be equipped with 57 elevators, the division of labor of these 57 elevators is actually different. The 57 elevators in the Burj Khalifa are the first in the world in terms of transportation length, and these 57 elevators are installed in different areas of the Burj Khalifa, and they carry different tasks, these 57 elevators are responsible for visitors, residents, office workers and hotel service staff, as well as hotel guests who need to go up and down the stairs through transportation. And this division of labor is actually to improve the efficiency of the Burj Khalifa in terms of transportation.

The Burj Khalifa began construction in September 2004, and after the completion of construction, it surpassed many skyscrapers in the world at that time, and became the world's tallest building at that time, and the elevator of the Burj Khalifa was designed to reach the height of the 124th floor of the Burj Khalifa in one minute. This is because this height is currently the highest indoor viewing platform in the world. Although the Burj Khalifa has 162 floors, there is no elevator in the Burj Khalifa that can reach the 162nd floor.

Therefore, at the beginning of the design, the Burj Khalifa was also designed with a transfer area. <>

The so-called Transit is the addition of another elevator between a certain number of floors, from which it is used as a starting point for transportation to the 16th floor. In the design of the Burj Khalifa, only the 43rd floor, 76th floor and 123rd floor are designed with interchange areas. And in order to meet the needs of so many users, it is necessary to install more elevators in the Burj Khalifa.

That's why the Burj Khalifa will install up to 57 elevators. If all the 57 elevators are from the first floor directly to the top floor, it will indeed seem a lot, but many of the 57 elevators are faulty. Like the transfer area we just mentioned, it needs another elevator to operate.

At the same time, they have their own division of labor.

The Burj Khalifa is a symbol of the UAE and has a high reputation in the world. There are many elevators inside. The main reason is because it is a luxury hotel in itself. In order not to affect the time of customers. Multiple elevators to save everyone's time.

It is to make it more convenient for people to ** to the whole panorama of Dubai. It is also to make this tower more technological.

Otis designs elevators for the Burj Khalifa, the world's tallest building.

**: Chongqing** 2009-10-23 News (Reporter Guo Xiaojing) Yesterday, Otis global president Mai Shaode said in Chongqing that Otis is currently designing a through elevator for the world's tallest building, ——— Burj Khalifa.

At over 600 meters tall, the Burj Khalifa is the tallest tower in the world. One of the elevators provided by Otis is from the ground floor to the top floor, and it is not possible to change the elevator in the middle, and we are designing this elevator. McShaode said that no company in the world has ever made such an elevator.

Otis accepted the challenge and decided to invest in a co-construction with the Burj Khalifa owners.

According to reports, the Burj Khalifa will have more than 160 floors and 56 elevators with a speed of 18 meters per second, which will be the fastest and longest elevator in the world. "This design will be the pinnacle of what technology can achieve, and no building has ever been built as high as before. New elevators have had to be developed that can accommodate this height.

Naman Attala, sales manager at Elma Properties, said.

Summary. Ultra-high-speed elevators often have large acceleration and deceleration, which will cause greater overweight and weightlessness to passengers. When the elevator runs too fast, there will be large vibration and noise, the air pressure in the car will change sharply, and some passengers' eardrums will feel uncomfortable.

So high-speed elevators are not yet common Ordinary people can't withstand such gravity Like Dubai's high-speed elevators, there is only one, and the others are layered upstairs There is a transfer area on the middle floor of the Burj Khalifa, which seems to be a 74-floor transfer So if you separate it like this, the elevator speed will not reach the super high speed, and the one you said will go straight to the 124th floor in 1 minute, and there is only one Ordinary people will not be full to sit on that.

Ultra-high-speed elevators often have large acceleration and deceleration, which will cause greater overweight and weightlessness to passengers. When the elevator runs too fast, there will be large vibration and noise, the air pressure in the car will change sharply, and some passengers' eardrums will feel uncomfortable. So the high-speed elevator is not yet common to prepare for hail digging Ordinary people can't withstand such gravity Like Dubai's high-speed elevator, there is only one, and the others are layered imitation core upstairs There is a transfer area on the middle floor of the Burj Khalifa, which seems to be a 74th floor transfer So if you separate it like this, the elevator speed will not reach the super high speed, and the one you said will go straight to the 124th floor in 1 minute, and there is only one Ordinary people will not be full to sit on that.

Ultra-high-speed elevators often have large acceleration and deceleration, which will cause greater overweight and weightlessness to passengers. When the elevator runs too fast, there will be large vibration and noise, the air pressure in the car will change sharply, and some passengers' eardrums will feel uncomfortable. So the high-speed elevator is not yet common to prepare for hail digging Ordinary people can't withstand such gravity Like Dubai's high-speed elevator, there is only one, and the others are layered imitation core upstairs There is a transfer area on the middle floor of the Burj Khalifa, which seems to be a 74th floor transfer So if you separate it like this, the elevator speed will not reach the super high speed, and the one you said will go straight to the 124th floor in 1 minute, and there is only one Ordinary people will not be full to sit on that.

B test question analysis: the elevator descends in the process of acceleration first, then at a constant speed, and finally decelerates to zero, when in the constant speed stage, the tensile force is equal to gravity, a is wrong; When the elevator runs down from the 160th floor, the initial and final velocities are zero. According to the kinetic energy theorem, the work done by the combined external force is equal to zero, then the magnitude of the work done by the tensile force is equal to the magnitude of the work done by gravity, b is correct.

For option C, this option is incorrect if the elevator accelerates to maximum speed first and then decelerates immediately, but if the elevator accelerates first and then at a constant speed and then decelerates at the end, this option is correct (regardless of the moment when acceleration is obtained) C is incorrect. It is impossible for the elevator to do constant power work, because the power is equal to the product of the tensile force and the velocity, the initial and final state of the elevator, the power is zero, and d is wrong.

The British "Daily Mail" June 18, 2013** said, the world's tallest residential building Dubai "Princess Tower" 8 elevators all broke down a few days ago, living on the top floor of the wealthy homeowner was forced to climb 97 floors to get home, repair elevator parts to be shipped from Finland, and will be delayed.

A 47-year-old resident on the 78th floor said that after a hard day's work, he realized that he had to climb back downstairs when he got home, so he went to stay in a restaurant. But I hope they will fix it quickly, and they can't afford to stay in a hotel every night.

The "Princess Tower" is 414 meters high, with 101 floors above ground and 6 floors underground, of which 97 floors are residential. Completed in September 2012, the Princess Tower has a total of 763 mansions and 8 shops, with a daily rent of about 140 pounds (about 1,328 yuan) for two bedrooms and one living room, and more than 2 million pounds (about 19.21 million yuan) per unit on the top floor.

On June 10, 2013, it was reported that an abnormality occurred in the fire alarm system of the Princess Tower, and after the fire hose on the 96th floor was activated, water poured into the elevator shafts of each elevator, causing all elevators to malfunction. Two hours later, two emergency standby elevators were activated, but only to the 50th floor at most, and residents above the 51st floor had to climb the stairs to cover the remaining distance. After another 12 hours, the maintenance staff manually operated an elevator to serve the residents from the 51st to the 97th floor, but these residents had to call the administrator to call the elevator.

The Burj Khalifa, also known as Dubai Tower or Burj Khalifa, has 162 floors and a total height of 818 meters, which is 310 meters higher than Taipei 101. The Burj Khalifa, built by South Korea's Samsung Company, began construction on September 21, 2004 and is expected to be completed and opened by the end of December this year, with a total cost of about $80 billion. The installation of the glass curtain began in early 2007, and the construction and installation of the metal pin façade began in June 2007.

The height of the Burj Khalifa is known as the "highest in the world". When the Burj Khalifa is completed, the world's first Armani Hotel, designed by renowned Italian designer Armani, will be located in it. In addition to luxury Hatone residences, commercial offices and leisure facilities, the Dubai Trembling Tower will feature an observation deck on the 124th floor, allowing visitors to enjoy the Dubai landscape from a height of approximately 440 meters.