1. 研究目的与意义（文献综述包含参考文献）
1. StructureConcrete is a mixture of sand, gravel, crushed rock, or other aggregates held together in a rocklike mass with a paste of cement and water. Sometimes one or more admixtures are added to change certain characteristics of the concrete such as its workability, durability, and time of hardening. As with most rocklike substances, concrete has a high compressive strength and a very low tensile strength. Reinforced concrete is a combination of concrete and steel wherein the steel reinforcement provides the tensile strength lacking in the concrete. Steel reinforcing is also capable of resisting compression forces and is used in columns as well as in other situations.
2. 研究的基本内容、问题解决措施及方案
Common building factors for multi-story buildings include long spans and clean space, increased layout flexibility, and the realization of floor efficiencies. The most preferred project for a select few are concrete frame structures, which can be selected to provide services at low maintenance costs. a certain brittleness is found that is strong in compression and weakness in disease, which is only alarming about ten percent of its compressive strength and zero resistance after cracking, it must be reinforced with steel feelings to withstand the stresses found by vibrations, wind loads, etc. d.
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