Adjustment Method of Cable Internal Force of Bridge with Continuous Deck Structure

Abstract

The invention provides an adjusting method of continuous deck structure bridge inhaul cable internal force. The adjusting method is characterized by including following steps: step 1, after all inhaulcables of a bridge are tensioned for the first time, adopting a frequency method to recognize actual internal force of each inhaul cable; step 2, building a bridge structure finite element model; step 3, in consideration of temperature impact, analyzing and calculating final tension amount of each inhaul cable of the bridge under action of applied and adjusted internal force on the basis of the bridge structure finite element model; step 4, adjusting the bridge inhaul cable internal force according to the final tension amount of each inhaul cable: converting the tension amount of each inhaulcable into rotating angle of an anchor head nut of the inhaul cable, and adjusting the bridge inhaul cable internal force according to the nut rotating angles acquired by calculation. The method can ensure accuracy of inhaul cable internal force adjustment and substantially improve tension efficiency of the inhaul cables, is quite convenient to implement and has great popularization and application value in inhaul cable internal force adjustment of bridge newly-building or old bridge cable replacing projects.

Description

technical field

[0001] The invention belongs to the field of bridge construction and detection, and in particular relates to a method for adjusting the internal force of a bridge cable with a continuous bridge deck structure.

[0002] technical background

[0003] With the rapid development of the national economy, the country's investment in transportation infrastructure is also increasing. The proportion of bridge construction in the railway network and road network is getting higher and higher. Bridges cross rivers, canyons, existing traffic lines and other various fields. When building a specific type of building, it is necessary to adopt a long-span cable system bridge of hundreds of meters or even thousands of meters. For structures such as cable-stayed bridges, suspension bridges or arch bridges, which have both cable-bearing members and continuous decks, in order to ensure that the bridge alignment and internal forces achieve a more ideal design state, the reasonable ...

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