Flexible tied arch bridge structure with adjustable skewback rigidity

Abstract

The invention discloses a flexible tied arch bridge structure with adjustable skewback rigidity. The flexible tied arch bridge structure comprises pier column limbs arranged on a bearing platform and a portal frame cross beam connected between the tops of the two column limbs of the pier column limbs. An arch support is fixedly connected to a cross beam of the door-type frame and fixedly connected with an arch rib, a flexible tie bar penetrates through the cross beam of the door-type frame and then is anchored to the end of the cross beam of the door-type frame, and a through type flexible tied arch bridge system is formed. The flexible tie bars are used for balancing horizontal thrust generated by the arch feet; and an X-shaped supporting frame is arranged between two column limbs of the pier column limbs and used for adjusting the overall anti-pushing rigidity of the pier. The flexible tied arch bridge structure with the adjustable skewback rigidity is high in stress mechanism and bearing efficiency, high in spanning capacity, excellent in economic performance and small in field operation amount and construction difficulty, the bearing efficiency of the bridge structure is improved from the aspects of the structural system and the internal stress mechanism, the flexible tied arch bridge structure is well connected with a traditional construction method, implementation is convenient, and the practical value is great.

Description

technical field [0001] The invention relates to the technical field of bridges in civil engineering, in particular to a flexible tie-bar arch bridge structure with adjustable abutment rigidity. Background technique [0002] A bridge is a structure for crossing various obstacles (such as rivers or other structures) in highways, railways, urban roads, rural roads, and water conservancy construction. According to the mechanical characteristics of the structure, bridges can be divided into combined systems such as beams, arches, rigid frames, and hangers. The arch bridge is a classic bridge structure, which can be divided into upper, middle and lower-supported types according to the position of the bridge deck system. Due to the characteristics of low building height, strong spanning capacity, good economy and low requirements for foundation bearing capacity, mid- and under-through tied arch bridges are widely used in areas with limited bridge deck elevation, clearance under th...

AI Technical Summary

Problems solved by technology

[0005] (1) The bearing efficiency of the structure is low. When the span exceeds 300m, the horizontal thrust of the arch foot is large, the technical risk increases, the safety of the structure deteriorates, and the engineering economy deteriorates;

[0006] (2) Insufficient rigidity of the abutment leads to a significant reduction in driving comfort of the structure

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