The continuous depletion of resources makes all industries around the world pay more attention to green design and development, and the construction industry is no exception. In recent years, people pay more and more attention to the design of green buildings. Generally speaking, buildings that make full use of the elements in the ecosystem, respect and conform to the laws of the ecosystem, and design in combination with regional cultural characteristics and natural conditions are green buildings. Such architectural design can reduce the use of resources. Through the analysis of the green building structure design of office building, it provides reference for the green design of other building structures.
Selection analysis of 1
1. 1 steel frame and reinforced concrete composite building structure. Safety and durability are the most basic requirements for building structure design in China's "Green Building Evaluation Standard", and they are also the premise of green building structure design. The structural design of four buildings is put forward in the code, in which the wood structure system will consume a lot of forest resources, and at the same time, a lot of wood is inconvenient to carry in the office building construction. Under such conditions, the combination of steel frame and reinforced concrete building structure can be said to be a general choice for green building structure designers of office buildings. This kind of building structure can well meet the seismic requirements of office buildings and reduce the impact of buildings on the surrounding environment.
For example, the tower of Beijing LG Building adopts the combination of steel frame and reinforced concrete in structural design. In the seismic impact analysis, the results show that this structure has excellent seismic advantages. The dimensions of steel beams of its outer frame are H903×304× 15×20 and H835×292× 14× 18. The strength of concrete is C60~C40. When two actual seismic waves and 1 artificial seismic waves are used for seismic performance analysis, the data results are all less than1100 of the allowable values specified in Code for Seismic Design of Buildings (GB 5001-2001).
1.2 reinforced concrete frame of building structure and some steel structures. The building structure of reinforced concrete frame and partial steel structure is the improvement of the above building structure, which mainly changes the steel frame structure and reinforced concrete frame structure. Such a building structure can reduce the consumption of steel resources on the basis of retaining the advantages of the building structure composed of steel frame and reinforced concrete. At the same time, because some office buildings are located in a large green area, steel structures are prone to corrosion, which increases the maintenance cost of office buildings and greatly reduces the service life of steel frames, which is not conducive to the development of green building structure design of office buildings.
In view of this situation, reinforced concrete frames and some steel structures can make up for the shortcomings of steel frames. For example, a construction company in Foshan, Guangdong Province, when building an office building with a total construction area of 2 1, 5 1, 654, 38+0 m2, considered a lot of surrounding greening and waterproof work of steel structures, selected reinforced concrete frames and some steel structures for design, so as to achieve the purpose of being reasonable, economical, green and saving resources.
Two design points
2. 1 Design according to the actual situation of the office building. When designing the green building structure of an office building, the first thing to do is to make an actual investigation and analysis of the office building. It is necessary to design the architectural structure of the office building according to the climatic conditions in different regions, the greening around the office building, the duration, intensity and angle of direct sunlight, and the characteristic culture of the region. At the same time, it should also be combined with the requirements of office building design. For example, when the office building of the Expo Eco-Green Center was built in Kunming, Yunnan Province, the office building was designed according to the geographical location of Yunnan Province and the characteristics of Kunming, such as spring-like seasons, rich plant species, strong sunlight radiation and dry climate, and according to the requirements of China's green building evaluation standards. At the same time, due to the particularity of the office building of the Expo Ecological Green Center, it must be close to the Expo site, so the building is located at the intersection of Expo Avenue and Chuanjin Road, which is convenient for staff management.
2.2 Design and application of steel grid structure. Steel grid structure is also one of the key points in office building design, especially for the atrium roof of office building, some architects usually choose to use steel grid structure because of the problems of building span and load bearing (pictured). If the reinforced concrete structure is adopted, the bearing capacity of other structures in the office building will increase due to its heavy weight, which will reduce the service life of the office building and also have potential safety hazards.
Using steel grid structure in office building can greatly reduce the weight of roof and the load of other structures. For example, Guangzhou Lin Jing Construction and Installation Engineering Co., Ltd. adopted the steel grid structure to design the atrium roof when designing a building. This structure not only reduces the bearing burden of other buildings, but also makes the appearance and internal structure of the office building more beautiful because of its lightness and transparency. Steel grid structure
2.3 office building appearance beautification design. With the increasing demand for office buildings, it is more important to attach importance to the beautification design of office buildings in architectural structure design. In some buildings, designers make the appearance of office buildings more attractive through the analysis and utilization of light and shadow, and people's visual experience can change with the change of sunlight intensity and angle. Designers should fully combine the various structural functions of the office building and optimize the design appearance. The beautification design of architectural modeling, doors, windows, roofs and other buildings is a relatively simple and intuitive beautification method, especially the design of doors and windows, and the changes in the size, material and shape ratio of window openings can affect the external beauty of the whole office building. For example, Guangzhou Zhongying Plaza office building uses glass curtain wall to beautify the appearance design of the office building, and uses a lot of glass splicing to make the appearance of the building more transparent, and at the same time, it can make maximum use of sunlight, which meets the requirements of the green building structure design of the office building.
3 structural optimization design analysis
3. 1 Optimal design of building materials for office buildings. In the design of green building structure of office building, the most important thing is the optimal design of materials. In addition to using green building materials, it is also necessary to realize the economical use of building materials as much as possible. Through the design and analysis of the office building structure, further optimizing the design drawings, reducing the use of building materials and maximizing the use of resources are the central contents of the green building structure design of the office building. For example, in the above article, the construction company in Foshan City, Guangdong Province, after selecting the reinforced concrete frame and some steel structures, optimized the materials according to the drawings, and minimized the amount of reinforced concrete materials by adjusting the distribution of secondary beams in the building. This optimization reduces the amount of steel bars from 35.63kg/m2 to 33.40kg/m2, saving 6% of steel bars and 8.8m3 of concrete, thus reducing the construction cost and achieving the goal of green building structure design of office buildings.
3.2 Environmental protection and energy-saving design of office buildings. In the green building structure design of the office building, besides controlling the environmental protection of building materials, the principle of environmental protection and energy saving should also be embodied in the functional design of the office building. Through the design control of land saving and outdoor environment, energy saving and energy utilization, water saving and water resources utilization, and indoor environment quality, the three-star design control of office building green building is realized, and the highest standard of office building green building structure design requirements is achieved.
4 abstract
To sum up, when designing the green building structure of office buildings, we should not only follow the national standards, but also consider various factors. By selecting the appropriate green building structure system of the office building, according to the key points of the green building structure design of the office building, the green building structure of the office building is optimized, the resource consumption of the office building is significantly reduced, the service life of the office building is prolonged, and the due role of the green building structure design of the office building is realized.
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