Three span continuous rigid structure steel arched bridge

Abstract

This invention relates to a kind of three strides serial rigid steel arched bridge. It includes the medium bear main arch rib, the main arch deck which connects with the main arch rib through suspender and the medium bear side arch rib which is on both sides of main arch rib, the side arch deck which connects with the side arch rib and fixes it through the suspender. The main arch rib connects with the side arch rib's inner side arch springing through the triangular rigid structure on main frusta. The side arch rib's outer side arch springing connects with side frusta through support abutment. On both sides of side arch deck there is flexible tie bar, the side arch rib's outer side arch springing and the side frusta's connecting support abutment are portrait glide support abutments. The main arch deck is steel structure or steel mixture combination structure. The side arch deck is the concrete structure. This invention improves the whole bridge's rigidness by optimizing the structure. It makes the main frusta's imbalance flexural torque and level force become small. It lowers the base design difficulty and saves the bridge's steel usage. It also saves the investing cost. Its three strides serial rigid steel arch becomes more beautiful and harmony on appearance.

Description

technical field [0001] The invention relates to a long-span arch bridge, in particular to a three-span continuous rigid-frame steel arch bridge with a large span, relatively high structural rigidity and a good stress state. Background technique [0002] With the development of transportation construction, the technology of long-span bridges has been greatly improved. Because of its curvilinear shape and aesthetic feeling unmatched by other bridge types, arch bridges are easier for designers to play in bridge aesthetics, so they have a greater possibility of popularization and application in bridge construction. [0003] Thrustless arch bridges require strong reaction force from the foundation, and it is difficult for arch bridges built in plain areas to have such good geological conditions to meet the structural force requirements. Therefore, current arch bridges are generally designed as three-span self-anchored arch bridges. Figure 4 It is a schematic diagram of the struc...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a three-span continuous rigid steel arch bridge, which effectively solves the problems of the prior art three-span self-anchored arch bridge with complex local stress, large investment when the span is large, and side arch structures that cannot meet the needs of long-span use. defect

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