英语基础测试试题69
Discussion on the application and development of steel concrete structure
Author: Liu Rui
Steel concrete composite structure is a kind of structure which is bad on the steel structure and reinforced concrete structure. It is a new type of structure, which is bad on the steel structure and reinforced concrete structure. In this paper, the application and development of steel concrete structures are discusd.
Key words: steel concrete; structure; application; development
One, the application of steel and concrete
syndex(a) steel and concrete composite structure in accordance with steel and steel reinforcing way different has many types, such as composite floor and composite beam, steel pipe concrete column, steel reinforced concrete members.分别英文
(two) concrete and steel are widely ud in construction projects. But it has its own shortcomings: the concrete compressive performance is good, and its tensile performance is very poor; although the tensile strength of steel, but it depends on the stability of the bearing capacity, strength can not be fully utilized. Steel concrete composite structure is a new type of structure which is compod of two kinds of different properties of steel and concrete. It is a reasonable combination of steel and concrete materials, the full play of high tensile strength, good plasticity, and concrete compressive strength of the advantages, make up for their shortcomings, has been widely ud in high-ri, high-ri, heavy industrial architecture, bridge structure, high-ri building. And gradually formed a new structure with the traditional four major structures (steel structure, concrete structure, wood structure, masonry structure).
(3) our system of steel and concrete combination structure, the bearing capacity, stiffness, slip effect, longitudinal anti shear and stud connection parts of the actual bearing capacity, concrete slab longitudinal shear calculation method etc. experimental study and theoretical analysis, obtained good application in multi-storey industrial building
s, high-ri building and bridge structure, and achieved good economic and social benefits.
Two, the advantages of the steel reinforced concrete composite structure
(a) the compressive and shear properties are good, and the bearing capacity of the concrete filled steel tube columns is more than one time. Compared with steel columns, the compressive bearing太原网络营销
capacity is slightly lower, but there is no local instability problem. If the high strength concrete is poured into the steel tube to form the concrete filled steel tube, under the restraint of the steel tube, the high strength concrete is in the three direction compression state, the ductility is greatly improved, so the function of high strength concrete can be really played.
gelatin>yw(two) the compressive bearing capacity is high, and can reduce the column ction and reinforced concrete column, steel tube concrete column due to the high compression bea
ring capacity, and can do not limit the axial compression ratio, so in the high-ri and super high-ri building in the u of steel tube concrete column, can reduce the cross ction 50% even more. Due to the high bearing capacity of concrete filled steel tube column, column ction, frame structure can be applied to large span grid, large space.
So in high-ri building with concrete filled steel tubular column than the reinforced concrete structure to increa the u of the area from 3% to 6%.
(three) the column ction reduces to the earthquake resistance
Compared and reinforced concrete columns, steel pipe weight concrete columns, ismic respon caud by earthquake action will be reduced. According to the data analysis, high-ri buildings in the structure system of steel tube concrete column and steel beams than the weight of the reinforced concrete structure can reduce a lot of, the earthquake can be reduced by half, quite on the fortification intensity dropped once.
encore是什么意思(four) the column ction reduces the cost of foundation ba贾平凹 丑石
simulCompared to the and reinforced concrete structure, concrete filled steel tubular column is ud to reduce the foundation load per unit area of more than 25%, and basic size is also a corresponding reduction, reducing the basic project cost.
Steel - concrete structure is further optimization and improvement of concrete and steel. Concrete filled steel tube is a composite structure formed by the concrete filled in the circular or square steel tube. The basic principle is: first, the stability of the steel tube wall is enhanced with the aid of internal filling concrete; condly, the core concrete is in the three direction compression state, so that the concrete has higher compressive strength and compression deformation ability. Compared with reinforced concrete not only has high strength, light weight, plastic, fatigue resistance, impact resistance and other advantages, but also has labor saving, material saving, fast construction characteristics.
Three, steel - concrete development
Relative to other types of structure, steel reinforced concrete structure in the rearch and application of time in China is not long. Especially for some major projects in the field
of civil杜牧 清明 >ballad
engineering, the theoretical rearch and design analysis method lags behind the engineering practice. In the construction structure, the u of steel reinforced concrete, while the bridge, marine and port, underground engineering and other fields of application less; the prestresd steel reinforced concrete structure, light steel reinforced concrete structure and special form of steel concrete structure, steel reinforced concrete structure in the construction load and construction period of the work mechanism and the study of the mechanical properties of less involved.
