Prestressed concrete-corrugated web steel box connecting beam hybrid beam structural system

Abstract

The invention discloses a novel hybrid beam structural system. The novel hybrid beam structural system comprises a corrugated web steel box connecting beam segment and prestressed concrete box beam segments. The prestressed concrete box beam segments are located on the two sides of the corrugated web steel box connecting beam segment. The novel hybrid beam structural system is mainly used for a continuous beam bridge or a rigid frame bridge. The midspan part of a main span is the corrugated web steel box connecting beam, the rest part of the main span and sidespans are prestressed concrete box beams, and steel-concrete composite segments are used for connection transition between the prestressed concrete box beams and the corrugated web steel box connecting beam. The novel hybrid beam structural system overcomes the defects of a traditional prestressed concrete box beam unitary system and defects of a traditional steel box beam unitary system, and has the beneficial effects of being good in stress performance and economical efficiency, high in span capacity and the like. According to the structural system, the dead load is effectively reduced, the span capacity is improved, the midspan deflection can be reduced, and the defects that the continuous downwarping and crazing of the midspan of the prestressed concrete box beam, poor stability of an ordinary steel box beam web and poor durability of bridge deck pavement are avoided.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a prestressed concrete-corrugated web steel box combined beam composite beam structure system. Background technique [0002] The bridge structure has developed rapidly since the 1950s. In recent years, due to the continuous development of material science, prestressed concrete girder bridges with a span of less than 200m have become a popular choice for engineers and technicians because of their low cost and high rigidity. first choice. However, engineering practice has found that when the span is large, the prestressed concrete girder bridge has the problem of continuous downward deflection in the span of the girder body, resulting in uneven driving and severe web cracking. Many bridges fail when they have not reached their design service life. In need of major repairs or outright demolition and rebuilding. Using steel box girder bridges can solve the above-mentio...

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Problems solved by technology

[0006] Purpose of the invention: the purpose of the present invention is to provide a prestressed concrete-corrugated web steel box combined girder hybrid beam structure system, which can make full use of the respective advantages of steel and concrete materials, while avoiding their shortcomings in terms of stress, and improve In the case of the spanning capacity of the bridge, it solves the problem of the connection of the mixed beam, the difficulty of the bridge deck pavement, the problem of the temperature affecting the next internal force, etc., which greatly simplifies the mechanical requirements of the pavement work, and for the prestressed concrete beam section Improvements have been made to the shortcomings of the connection with steel beams that lead to uneven stiffness transition and reduced driving comfort

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