Multifunctional comprehensive restraint device for whole construction and operation process of long-span hybrid-beam cable-stayed bridge

Abstract

The invention discloses a multifunctional comprehensive restraint device for whole construction and operation process of a long-span hybrid-beam cable-stayed bridge and relates to a bridge engineering technique. The multifunctional comprehensive restraint device comprises longitudinal dampers, multidirectional slideable supports and retractable devices. Longitudinal damping devices, longitudinal comprehensive multifunctional devices and transverse windproof supports with independent functions are arranged between a main beam and bridge towers. A damping function is independently realized at the operation period of the bridge. The longitudinal comprehensive multifunctional devices realize solidifying, pushing and limiting functions in the whole construction and operation process of the bridge. The multifunctional comprehensive restraint device provides effective rigidity and damping for the operation period of the long-span hybrid-beam cable-stayed bridge and guarantees that the static and dynamic response of the bridge is within an acceptable range. At the same time, the longitudinal comprehensive multifunctional devices are used for taking a temporary solidifying function in the splicing process of the upper structural cantilever of the bridge and are also used as main beam pushing force-bearing structures under the condition of full-bridge closure, a no-stress geometrical linear bridge construction control method is realized, the functions are clear, the force is born reasonably, the economic and practical performance is high and the multifunctional comprehensive restraint device is suitable for all kinds of long-span hybrid-beam cable-stayed bridges.

Description

Technical field: [0001] The invention relates to the technical field of bridge engineering, and relates to a restraining device for the whole process of construction and operation of a long-span mixed girder cable-stayed bridge. Background technique: [0002] With the development of bridge engineering technology, the span of modern cable-stayed bridges has exceeded one kilometer. Since the hybrid girder cable-stayed bridge came out in the former Federal Republic of Germany in the 1970s, it has been favored by European countries, Japan and other countries. After the 1990s, it has gradually attracted the attention of the bridge engineering industry in my country, and has developed rapidly in recent years. The main span of this bridge type uses steel girders to reduce its own weight and increase the spanning capacity, and the side spans use concrete girders for counterweight and increase the stiffness of the side spans, giving full play to the advantages of both steel and concr...

AI Technical Summary

Problems solved by technology

Under the action of the transverse gradient temperature effect of the main girder, different transverse restraint devices have different effects; if the transverse restraint device is not properly set, it will affect the safety and durability of the bridge structure

Research in this area is still rare in China

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