A H-type Stiffener Structure for Improving the Service Life of Concrete-filled Steel Tube Intersecting Joints

Abstract

The invention discloses an H-shaped stiffening rib structure for prolonging the service life of a steel pipe concrete tubular joint. The H-shaped stiffening rib structure is used for effectively reducing the fatigue stress amplitude of the steel pipe concrete tubular joint so as to prolong the service life of the joint. The H-shaped stiffening rib structure comprises a main chord pipe and web pipes which are welded with the main chord pipe in a penetrating manner at the positions of joints. An H-shaped stiffening rib is arranged at each of the positions, with relatively great penetrating welding seam stress, between the main chord pipe and each of the web pipes, and adjacent web pipes; each H-shaped stiffening rib is adhered and bonded to the surface of each of the corresponding main chord pipe, web pipes or adjacent web pipes.

Description

technical field [0001] The invention relates to a steel tube concrete structure, in particular to an H-shaped stiffener structure for improving the service life of a steel tube concrete intersecting joint, which can effectively reduce the fatigue stress amplitude of the steel tube concrete intersecting joint, thereby prolonging the joint fatigue life. Background technique [0002] Concrete-filled steel tube is one of the important forms of composite structure. It has good mechanical performance and construction performance. It has been widely used in civil engineering in recent years. In particular, it has achieved a number of international original achievements with important influence in the field of bridge engineering in my country. . The geometric shape of the connection structure of the concrete filled steel pipe structure is complex, and the stress distribution of different welding parts is significantly different, resulting in a lower fatigue bearing capacity than that...

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Problems solved by technology

[0003] For the built structure, the scheme of adding internal partitions cannot be realized; the construction of stiffening ring reinforcement is difficult and the space at the joint is limited; although casing reinforcement is beneficial, it can only be used for simple joints such as T-shaped, and for K-shaped and other similar joints. It is quite difficult to strengthen the cutting work with sleeves for the joints with slightly complicated lines; the welded rib reinforcement method is easy to crack or even damage the base metal, so it has basically not been practically applied in engineering

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