Search

With the improvement of requirements for the building, and the effects of various factors for some existing steel structure building during the long-term service process, structural function is damaged, which requires reinforcement for existing structures to meet the requirements of its use of the function. This paper systematically introduces the research and application of steel structure member on strengthening aspects, which is prepared for the research of steel column reinforced by enclosed reinforced concrete under axial compression with initial compressive load. According to development and characteristics of steel columns reinforced by enclosed reinforced concrete under axial compression, this paper analyzes the common working mechanism of steel structure and concrete after reinforcement, and introduces the calculation method and its engineering application in our country.

With the lapse of time, the carrying capacity of early steel structure buildings which affected by various factors in the process of long service has dropped. Meanwhile, the use function of buildings has been asked for a higher level with the improvement of people's living standard. In this case, the assessment and reinforcement on buildings are particularly important. In this paper, the characteristics and mechanical properties of axially loaded steel columns strengthened by welding under load and axially loaded steel columns strengthened by enclosed reinforced concrete under load, the mechanism of steel and concrete work together and the reduction coefficients of steel and concrete of enclosed reinforced concrete have been systemically introduced. To pave the way for the following researches of steel numbers reinforced under load.