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 based on the steel structure and

reinforced concrete structure. It is a new type of structure, which is based on the steel structure

and reinforced concrete structure. In this paper, the application and development of steel concrete

structures are discussed.

Key words: steel concrete; structure; application; development

One, the application of steel and concrete

(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.

(two) concrete and steel are widely used 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 composed

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 used in

high-rise, high-rise, heavy industrial architecture, bridge structure, high-rise 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 buildings, high-rise 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 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.

(two) the compressive bearing capacity is high, and can reduce the column section and reinforced

concrete column, steel tube concrete column due to the high compression bearing capacity, and

can do not limit the axial compression ratio, so in the high-rise and super high-rise building in the

use of steel tube concrete column, can reduce the cross section 50% even more. Due to the high

bearing capacity of concrete filled steel tube column, column section, frame structure can be

applied to large span grid, large space.

So in high-rise building with concrete filled steel tubular column than the reinforced concrete

structure to increase the use of the area from 3% to 6%.

(three) the column section reduces to the earthquake resistance

Compared and reinforced concrete columns, steel pipe weight concrete columns, seismic response

caused by earthquake action will be reduced. According to the data analysis, high-rise 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.

(four) the column section reduces the cost of foundation base

Compared to the and reinforced concrete structure, concrete filled steel tubular column is used 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; secondly, the core concrete is in the three direction compression state,