Structural steel-UHPC (Ultra High Performance Concrete) composition board longitudinal rib staggered arrangement construction and construction method thereof

Abstract

The invention discloses a structural steel-UHPC (Ultra High Performance Concrete) composition board longitudinal rib staggered arrangement construction and a construction method of the structural steel-UHPC composition board longitudinal rib staggered arrangement construction, the structural steel-UHPC composition board longitudinal rib staggered arrangement construction comprises a structural steel-UHPC composition board at the upper part and a steel beam, the structural steel-UHPC composition board is mainly combined from a UHPC board and a structural steel, the structural steel is arrangedas a longitudinal rib along a longitudinal bridge; the longitudinal rib of the structural steel-UHPC composition board adopts a staggered arrangement mode, a web overhanging section is arranged at theend part of the structural steel on a transverse joint and extends into the transverse joint along a web of the structural steel, and the web overhanging sections on the two sides of the joint interpenetrate in a staggering way. The longitudinal ribs on the joint adopt the staggered arrangement mode, part of the UHPC is at the pressed state, the crack risk is reduced, the cross section of the joint has a better mechanical property, the longitudinal and transverse rigidity of a bridge panel is also conveniently matched, therefore, the problem of too large axial force of the bridge panel at theupper part of an inner support point of a main beam and a continuous beam near a cable bent tower is well solved, the material is also made full use, and the construction cost of the bridge is low.

Description

technical field [0001] The invention belongs to the technical field of bridge components and their construction, in particular to a longitudinal rib staggered arrangement structure of a section steel-UHPC composite plate suitable for large-span bridges and a construction method thereof. Background technique [0002] In the traditional composite beam cable-stayed bridge, the concrete deck has to bear the horizontal component force from the stay cables, so its average thickness is thicker, generally greater than 26cm, resulting in a large ratio of the deck to the total weight of the main beam, often 70% Above, the overweight main girder is the main factor limiting the upper limit of the bridge span, making it uneconomical when the span of the steel-concrete continuous system girder bridge exceeds 110m, and the upper limit of the economic span of the composite beam cable-stayed bridge is 600m. At the same time, due to the force characteristics of the cable-stayed bridge, the ax...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the above background technology, to provide a staggered arrangement structure of section steel-UHPC composite plate longitudinal ribs suitable for long-span bridges, and to solve the negative bending moment at the transverse joints The bridge deck is easy to crack and the axial force of the beam section near the cable tower is too large

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