Arch bridge suspender state evaluation method considering environment and cable body state

Abstract

The invention provides an arch bridge suspender state evaluation method considering an environment and a cable body state, which comprises the following steps of: firstly, finding out main factors influencing the normal use state of a suspender, listing the found factors as evaluation indexes, determining the index weight of each evaluation index by adopting an analytic hierarchy process, then detecting each evaluation index of the suspender, and determining the state of the suspender according to the index weight of each evaluation index. The method comprises the following steps: detecting the weight of each evaluation index, scoring each evaluation index according to a detection result to obtain an index score value of each evaluation index, calculating an inhaul cable state evaluation index BCEI according to the index weight and the index score value of each evaluation index, and then evaluating the suspender state according to the calculated inhaul cable state evaluation index BCEI. According to the method provided by the invention, the defect of relatively single inhaul cable force evaluation in the prior art is overcome, the inhaul cable force, cable body wire breakage or corrosion, protective layer damage and anchor head corrosion influence factors are comprehensively considered, the inhaul cable is completely evaluated in multiple aspects, and meanwhile, the simplicity and accuracy of suspender evaluation are improved.

Description

technical field [0001] The invention relates to the technical field of bridge evaluation and maintenance, in particular to a method for evaluating the state of an arch bridge hanger rod under consideration of the environment and the state of the cable body. Background technique [0002] As a key component of bridges, the boom plays an important role in various types of bridges. In the tied arch bridge, the boom is an important force-bearing component. Therefore, it can be said that the safety of the boom is related to the whole. bridge safety. However, with the increase of service time, due to the combined action of external environment and fatigue load, the suspension rod often suffers from corrosion and other problems, which seriously affects the life of the bridge. Therefore, in order to clarify the decision-making of bridge maintenance and repair in the next stage, it is necessary to evaluate the status of the suspender, and the evaluation results can provide the basis ...

AI Technical Summary

Problems solved by technology

The existing Chinese invention patent application with the publication number CN111695176A provides a semi-probability and semi-state based method for evaluating the state of cable components of long-span cable-stayed bridges, which uses a probability-based evaluation method for fatigue characteristics of cable-stayed cables. For other characteristics, the state-based evaluation method is used for evaluation, but it focuses more on the probability evaluation of cable fatigue. For the state evaluation of other characteristics, this method needs to collect a large amount of information, and the process is cumbersome, time-consuming, labor-intensive and accurate. insufficient

Another Chinese invention patent application with publication number CN113030240A provides a Beidou mode cable-stayed bridge cable force damage identification method and related equipment, and a data-driven visual long-span slope provided by Chinese invention patent application with publication number CN111553003A. The cable evaluation method of the bridge, neither of which evaluates the damage and corrosion of the protective layer of the cable

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