Talk about the pros and cons of tall buildings 20

Before commenting on "oversized high-rise buildings", it is important to understand the definitions of "high-rise buildings" and "super high-rise buildings". The starting height of high-rise buildings varies from country to country. China:

8 floors and above: 24 meters; USA: 22-25 meters above 7 floors; France: Residential 50 m; Other buildings 28 meters; United Kingdom:

24 3 meters; Japan: 11 storeys or more, 31 m; Germany: 22 meters; Belgium:

25 meters ......The definition of super high-rise buildings is relatively consistent, and it is currently internationally recognized that high-rise buildings with a height of 30 floors or more than 100 meters are called "super high-rise buildings".

The so-called "super high-rise building", recently defined by the Ministry of Construction: overrun high-rise building project refers to "high-rise building projects that exceed the applicable height and applicable structure type stipulated in the current national codes and regulations, high-rise building projects with particularly irregular body shapes, and high-rise building projects that should be subject to special seismic review according to relevant codes and regulations." ”

There are many reasons for the occurrence of "overrun engineering". First of all, the architect's design thinking is unconstrained, too advanced or does not pay attention to the current norms, indulging in the spiritual enjoyment of "architectural art", whimsical and ingenious ......Of course, there are also constraints due to the shape of the building site or ...... in order to cater to the unscientific needs of the developerWait a minute.

From the rationality analysis of the building structure, it is impossible for any "overrun project" to be included in the scope of excellent projects. The disadvantages are obvious: first, it is unsafe, especially for earthquake resistance, because it exceeds the limit of the code, whether it is plane or space, its overall stability and anti-overturning ability must be lower than that of the building that does not exceed the limit.

Second, it is uneconomical, because "exceeding the limit" will inevitably have to pay a higher economic price than the normal situation. The material cross-section is increased, the joint strength is strengthened, and the additional members are increased, ......And so on and so forth.

However, there are always two sides to the occurrence of things, and from the perspective of promoting social development and the progress of human civilization, the "overrun project" also has its "indispensable" side! It is undeniable that some "overrun projects" have the ...... of good architectural function and good appearance effectand other advantages and features. For example:

The design of the Sydney Opera House was a special "overrun project" at the time, because in the 50s there were no computers and the theory of thin shells was not yet mature. Such a huge shell building. A large number of structural engineers have been stumped!

It is reported that during the construction process, nine structural engineers were replaced one after another, and it was finally completed! The Sydney Opera House is famous for its unique shape and best vocal effects!

It can be seen from this that the "overrun project" cannot be beaten to death with a stick. In a sense, the emergence of the "overrun project" is a historical necessity and a driving force to promote the progress of society. The Ministry of Construction has recently set up the "Office of the National Expert Committee on Seismic Fortification of Oversized High-rise Building Projects".

For those "overrun projects" with good building functions, good appearance effects, and excellent social effects, we should not only stop them, but also give them active support.

But safety comes first.

8 floors but not the top floor.

There is little noise and dust, and it does not leak rain.

With the acceleration of urbanization, more and more houses are being built in the city, and the size of the city is getting bigger and bigger. At present, most residential buildings are dominated by high-rise buildings, with high-rise residential buildings of twenty or thirty floors.

Mainly, some are super high-rise buildings with thirty or forty floors.

Nowadays, many people like to buy high-rise houses, mainly because they have good lighting, good views, and elevators. When buying a high-rise residence, many people will see more immediate comfort. Will the high-rise residential buildings of the future be so good?

In another 30 years, who will demolish these high-rise residences? Who will guarantee the quality? High-rise residential buildings will face the following three major problems.

1. There is a problem of substantial depreciation of high-rise residential buildings. In the future, they may turn into "ghettos."

The rich will move out, and the poor will live there. Although there is a risk of depreciation of commercial housing, high-rise residential buildings will face many problems due to various old and other factors.

Now, many owners rent out their homes and then move out. In the past, owners of old neighborhoods have wanted to demolish, but the cost of demolishing high-rise homes is too high for no developer to do so.

2. Security risks.

Very high. Due to the large number of residents in high-rise dwellings, various equipment systems are very complex. After aging, it is basically impossible to renovate and the maintenance cost will be high.

It is also easy to cause power outages, ** and other accidents. One might say that generators can be used for power outages. We are talking about power outages caused by equipment failures.

At that time, backup power could not be used. In the event of a power failure, you will have to climb the stairs. If there is a fire, the flames will go upward, and no one knows whether they can run away or not.

There are also things such as high-altitude projectiles.

Children climb windows, etc.

3. The shared area of high-rise residential buildings.

Big. Due to the population density of high-rise buildings.

High, in order to facilitate the travel of residents, they can only be equipped with more elevators. However, the more elevators there are, the more common areas are occupied. This has also led to an increase in population, a decline in the rate of home purchases and a decrease in the cost of buying a house, resulting in an unwarranted waste of the cost of buying a house.

The actual problems of super high-rise buildings, the new high-rise seems to be no problem, if it is the age, a long time, the problem will appear on the water elevator maintenance costs and aging wires, aging pipes, aging, this is to bury a lot of hidden dangers and problems, the maintenance cost of super high-rise buildings is too high.

1. Chasing "skyscrapers" is easy to be left vacant. At present, land resources are becoming increasingly tight, and the attitude of "upward growth" has made a certain contribution to the utilization of urban space. But it is clear that the problems outweigh the advantages.

Super high-rise buildings themselves have shortcomings such as long construction cycle, high cost, and difficult demolition and construction. Before completion, due to the long construction period and the great impact of capital changes, it is easy to fall into the dilemma of insufficient funds, which eventually leads to unfinished. If it is fortunate enough to be successfully completed, it will inevitably face the dilemma of high vacancy rate and low rental return.

2. Fire rescue capabilities do not match. The floors are too high, and when a fire breaks out, it is difficult to evacuate from the fire. The ladder can only reach 100 meters at the moment.

This is also the basis for the demarcation between supertall and high-rise. And many cities simply don't have enough firefighting capacity to carry out these super-high-rise rescues. Once a dangerous situation occurs, the consequences are unimaginable.

3. The high-level maintenance technology is immature and the cost is high. The higher the floor height, the more elevators and stairs are needed relatively, so that not only the economic cost of early construction is high, but also the financial expenditure required for later maintenance is also very large, and at present, the high-rise maintenance technology is not mature, and the safety awareness of aerial workers is not strong, and it is easy to cause accidents.

There are many problems in super high-rise buildings, the first is the problem of fire escape, which requires fire protection facilities and alarm facilities; The second is that the seismic requirements of the structure are high; The third is that the water supply needs to be pressurized halfway and relay the water supply; The fourth is that the elevator up and down the traffic needs to be repaired and maintained, and once it fails, it will be very troublesome.

1.Safety and fire issues

What should I do if a fire breaks out in a super high-rise building?

Article**2 The Chimney Effect of Vertical Channels.

Article **3 The role of high air currents.

Article **4 The height of the ladder is insufficient (the height of the conventional ladder is forty or fifty meters).

Article **5*** has many restrictions.

Article **62Traffic problems

There are a lot of staff in super high-rise buildings, and they must take the elevator, and some buildings even need to change elevators halfway, what if there is a problem with the elevator?

Article**7 commuting** rush hour, will cause floor congestion;

Article**8 There will also be ** peaks and peak traffic around super high-rise buildings.

Article **93Ecological and environmental problems

Super high-rise buildings block sunlight, and the sunlight spacing must be considered;

Article **10

High-rise buildings will lead high-altitude strong winds to the ground, causing local strong winds near high-rise buildings, affecting the safety of pedestrians;

Article **11

High-rise buildings can also exacerbate the urban heat island phenomenon.

Article **12

4.The issue of economic cost.

Because super high-rise buildings have the characteristics of special design, advanced technology, complex construction and huge material consumption, it generally costs a lot of money to build a skyscraper (China Zun's total investment is 24 billion).

Article **13

Conclusion: In this way, although the super high-rise building is beautiful and has the representative role of strength, there are also many problems.

However, I believe that the architects of the city of the future will be able to solve these problems with the blessing of rapid development of technology.

There are construction problems, safety problems, and operational problems in super high-rise buildings. Safety and management problems, environmental psychological problems, and the difficulty of evacuating people in the event of a fire require a lot of manpower, material and financial resources, and a lot of money to maintain. However, it is difficult to evacuate people in the event of a fire, such as ultra-high safety and management issues, environmental psychological problems, and fire resistance.

At the same time, it will also cause problems that affect people's residence, such as canyon effect, heat island effect, and electronic shielding effect.

The problems existing in super high-rise buildings are the problems of heating, water supply and power supply, and the safety of fast elevators. At the same time, there are also the problems of anti-anti-air and the safety problems that may be brought about by high-altitude and high-altitude air currents. If there is a problem with the elevator, the problem of how people go up and down the stairs, and the problem of safe evacuation of people on the upper floors in case of a fire, as well as the problem of fighting fires.

1. The construction cost is high.

When developers build super-high-rise residences, the cost of building materials and construction processes will be high, and the daily management costs will not be low, and some high-rise buildings with high vacancy rates will be overwhelmed. In addition, it affects the urban landscape, causing light pollution and many environmental problems.

2. It is inconvenient to use.

The more floors of the residence, the more people live in it, and the elevator of some super high-rise residential buildings is still divided into high and low areas, if the elevator fails, it will bring more trouble to the residents. The peak of commuting will cause congestion on the floor, and there will also be peak and traffic rush around super high-rise buildings. In case of water outages, power outages, elevators, it can be annoying.

3. The usable area is reduced.

In the construction of super high-rise housing, in order to make the low floor have enough load-bearing capacity, the thickness of the shear wall will be increased, so the thickness of the shear wall will increase with the increase of the floor, and the usable area will also be relatively reduced.

4. Fire safety issues.

Super high-rise residential buildings are prone to fire safety hazards, in the event of a fire, the fire ladder can only reach the height of 30 floors, it will be more difficult for residents to escape, and a large number of combustible materials are used in the decoration of super high-rise buildings, and a large number of wires and cables are distributed inside the building, once the fire is formed, the fire will be very rapid.

What are the problems of taller buildings? The higher the building floor, the more safety problems, and problems will be encountered in life, such as the lack of water pressure on the high-rise, the problem of water outage, the elevator can not go up when the power is out, and it is also very inconvenient to travel, and the high-rise building has safety problems, so only by doing a good job in all aspects of the supporting facilities, then living in the high-rise can be more at ease.

There are many problems in super high-rise buildings, such as wind, big fish, universities, fog and other natural disasters, which may have a very big impact on the residents of the high-rise, and there are many disadvantages of the high-rise, and there are many disadvantages of the high-rise, and the fire, high-altitude throwing objects, and the personnel are full of falling, which is also some of the disadvantages of the high-rise.

The most important problem in jumping high-rise buildings is the safety problem, and the high-rise fire is earthquake-proof. There are great hidden dangers in Tang Shengdu, once a high-rise fire occurs, the current rescue force is simply not reached, so the residents who live in the high-rise can only resign themselves to fate, and it is difficult to escape in time.

First, the problem of property cleaning. Because the floor is too high, it is more troublesome to clean the air.

Second, the problem of normal water use by residents. If there is a problem with domestic water, it is more troublesome to repair.

3. Maintenance of floors. If there is a wall falling off or some other problem, then the cost of repair is very high.

Fourth, after the floor is aging, the relocation cost will be very high, and the cost will be very high, and no one will invest. It will also be a very big problem in the future.

Therefore, there are still many problems in super high-rise buildings that need to be solved.

1. The building must use advanced building materials and construction technology, the cost is very high, and the daily management cost is not low, and some high-rise buildings with high vacancy rate are overwhelmed;

2. There are many staff in super high-rise buildings, and they have to reach the top floor or even transfer to the elevator in the middle of the floor.

3. The peak of commuting will cause congestion on the floor, and there will also be peak and traffic flow around the super high-rise building;

4. A large number of combustible materials are used in the decoration of ultra-high buildings, and a large number of wires and cables are distributed inside the building.