Steel-concrete composite beam

Abstract

The invention provides a steel-concrete composite beam. The steel-concrete composite beam comprises a beam top flange, a beam bottom flange and a web plate, wherein the top width and the bottom width of the beam top flange remain the same within intervals from the two ends to 1 / 8 to 1 / 4 of the total length; an arched structure is arranged within an interval at the central part except the above internals, in which the lower end is narrower than the upper end when approaching the center; within intervals from the two ends to 1 / 8 to 1 / 4 of the total length, the beam bottom flange is directly connected with the beam top flange in the form of a straight line; the web plate is formed by an I-shaped steel structure and is shaped like an arch, the width of which at the upper and lower parts is larger when approaching the center; and the web plate can be mounted at the central part except for the direct-connected part of the beam top flange and the beam bottom flange. According to the invention, the usage of heavy-weight concrete can be reduced and the dead weight of the steel-concrete composite beam can be reduced so that a bridge is easy to erect and a shallow-buried and large-span bridge is economically built; the usage of high price steel materials can be also reduced, the construction cost is reduced and the steel-concrete composite beam is convenient to make and construct; and in the using process, the interior of the composite beam can be also maintained and managed so that the bridge is more beautiful.

Description

【Technical field】 [0001] The invention relates to a steel concrete composite beam. 【Background technique】 [0002] There are many kinds of steel-concrete composite beams in the past, but they are not widely used because of their own shortcomings. [0003] Registered Patent No. 10-0511216 of the Republic of Korea discloses "composite beams formed of arched concrete-filled steel bar composite beams and tensile members". The space is filled with concrete and is an arched composite beam with tensile members at the lower end of the beam. The structure of this technology utilizes the strengths of concrete in the compression region and utilizes the tension member in the tension region. Although this can increase the structural performance, it is very difficult to maintain and manage the inside of the steel box girder because the concrete poured inside the steel box girder and the inside of the steel box girder cannot be observed. Moreover, the tensile parts are exposed outside, ...

AI Technical Summary

Problems solved by technology

The upper part of this technology is an arched PSC concrete U-beam, and the lower part is a composite beam composed of arched structure I-shaped steel beams. Although the economic benefits are greatly increased, it is very difficult to manufacture the upper arched concrete U-beam

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