《钢筋混凝土结构 》功课(国外英文资料).doc

《钢筋混凝土结构 》作业(国外英文资料) What are the advantages and disadvantages of the concrete structure? A: Advantages: A, materials easy to concrete used sand, stone, generally can use local materials, but also the industrial materials (such as slag, pulverized coal, etc.), made of artificial aggregate, used in concrete. Two, fire resistant, durable good reinforced concrete is wrapped in concrete not easy to rust, maintenance cost is low. Because concrete is a bad heat conduction body, the concrete ACTS as insulation in the fire, so that the steel reinforcement does not reach the softening temperature quickly and causes the whole destruction of the structure. Three, can die, integral sex is good Due to the new mixing concrete is of hard plastic, according to the need, can according to the different template size and style pouring into design request form. After the concrete is hardened, its integrity and rigidity are good. 4, the maintenance cost province reinforced concrete structure less need maintenance, unlike steel structure and wooden structure need regular maintenance. Disadvantages: First, the use of the structure of the high structure of the span structure is greatly restricted. Second, the crack resistance is poor Because of the low tensile strength of concrete, in normal use, often working with cracks, some do not allow the cracks or is required to strictly limit the crack width of structure, construction, project cost will be increased. 3, fiefer, fee template, the site construction period is long, and subject to seasonal effect. For the defects of the structure of reinforced concrete, the anti-cracking properties of structural self-gravity and improved structure can be reduced by light quality, high strength materials and prestressed concrete. In construction, the use of reusable steel templates or tools, as well as construction techniques such as top lift or lifting board. What is the difference between the big eccentricity and the small eccentric compression compo