Self-stress bridge continuous construction structure based on simply supported steel beams and construction method thereof

Abstract

The invention relates to a self-stress bridge continuous construction structure based on simply supported steel beams and a construction method thereof, and belongs to the field of bridge engineering structures and civil engineering materials, the self-stress bridge continuous construction structure comprises a self-stress connecting plate, an elastic deformation layer, a bridge deck pavement layer, a buffer energy absorption layer and a connecting structure; the self-stress connecting plate is made of a self-stress concrete material; the elastic deformation layers are arranged at the two ends of the self-stress connecting plate and are made of elastic concrete materials. An interface binder is smeared between the H-shaped steel beam and the bridge deck pavement layer, and the buffer energy absorption layer is a polytetrafluoroethylene rubber gasket; the connecting structure comprises inverted-U-shaped steel bars, shear nails, longitudinal steel bars and constructional steel bars, and the longitudinal parts of the inverted-U-shaped steel bars transversely penetrate through the self-stress connecting plates, are bent downwards in an arc shape in the elastic deformation layer and penetrate through the bridge deck pavement layer to be welded to the H-shaped steel beams. The connecting plate is made of a self-stress concrete material, and the self-stress bridge continuous construction structure is reasonable, so that the self-stress concrete connecting plate is better applied to the bridge connection construction structure.

Description

technical field [0001] The invention relates to a self-stressed bridge continuous structure structure based on simply supported steel beams and a construction method thereof, belonging to the fields of bridge engineering structures and civil engineering materials. Background technique [0002] In order to solve a series of problems caused by expansion joints, simply supported girder bridges mostly adopt the structural form of continuous simply supported girder bridges. The bridge deck is continuous, making it a continuous bridge with a seamless middle and a seamless mid-span. However, the existing ordinary concrete bridge connecting plates are prone to cracks in the tensile area under the actual load. With the further development of cracks, the durability of concrete down, eventually causing the bridge deck connecting plate to fail. [0003] In order to solve the above problems, the post-tensioning method is usually used to apply pre-compression stress to the continuous mem...

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Problems solved by technology

[0005] However, the self-stress value produced by using different expansion agent materials to make bridge deck connection plates varies greatly, and there is no formula suitable for the stress value required by the connection plate. At the same time, there is no relevant application of self-stress connection plates in bridge continuous construction. Literature, lack of corresponding continuous construction structures and construction methods

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