PBL (perfobond leiste) shear connector stiffened steel pipe concrete arch

Abstract

The invention discloses a PBL (perfobond leiste) shear connector stiffened steel pipe concrete arch which comprises a main arch constituted by continuously assembling a plurality of steel pipe concrete arch segments, and the steel pipe concrete arch segments are divided into two types, namely stiffened steel pipe concrete arch segments provided with PBL shear connectors and ordinary steel pipe concrete arch segments which are not provided with the PBL shear connectors according to the stress situations in the positions where the steel pipe concrete arch segments are located in the main arch; and each ordinary steel pipe concrete arch segment comprises an arch-shaped steel pipe II and a concrete-filled structure II poured in the arch-shaped steel pipe II, and each stiffened steel pipe concrete arch segment comprises an arch-shaped steel pipe I, a plurality of the PBL shear connectors distributed on the inner side wall of the arch-shaped steel pipe I along the direction of the axial line and a concrete-filled structure I poured in the arch-shaped steel pipe I. The PBL (perfobond leiste) shear connector stiffened steel pipe concrete arch has simple structure, is reasonable in design, convenient to construct, excellent in mechanical properties and easy to control construction quality, and can solve the problems of void disease between steel pipes and concrete, shorter service life and the like in the existing steel pipe concrete arch structure.

Description

PBL Shear Key Stiffened Steel Tube Concrete Arch technical field The invention relates to a main arch structure of a steel pipe concrete arch bridge, in particular to a PBL shear key reinforced steel pipe concrete arch. Background technique In the past 20 years, although the application of CFST arch bridges in China has made great achievements, due to the fact that no corresponding technical standards have been published so far, the design and construction mainly refer to relevant research results in the field of building structures, and its theoretical research is relatively lagging behind. At the same time, due to the large differences between the arch ribs of the CFST arch bridge and the CFST frame columns in the building structure, such as construction methods, loads and functions, nodes and structures, there are still gaps between steel tubes and concrete in the actual engineering of CFST arch bridges. The gap between the gaps makes the internal force transmission of ...

AI Technical Summary

Problems solved by technology

In the past 20 years, although the application of CFST arch bridges in China has made great achievements, due to the fact that no corresponding technical standards have been published so far, the design and construction mainly refer to relevant research results in the field of building structures, and its theoretical research is relatively lagging behind.

At the same time, due to the large differences between the arch ribs of the CFST arch bridge and the CFST frame columns in the building structure, such as construction methods, loads and functions, nodes and structures, there are still gaps between steel tubes and concrete in the actual engineering of CFST arch bridges. The phenomenon of voids in the space makes the internal force transmission of the CFST arch structure unclear.

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