Method for evaluating safety of service bridge structure

Abstract

The invention provides a method for evaluating the safety of a service bridge structure, which comprises the following steps: periodically acquiring images of the cross section of the bridge structure, converting the images, processing the converted images by binarization, and computing a zero-dimensional Betti number and a one-dimensional Betti number of the images processed by binarization. In the invention, according to the algebraic topology, for the two-dimensional space (namely the cross section of the bridge), the zero-dimensional Betti number describes the amount of blocks existing in the region of the cross section of the bridge, wherein when the number of the blocks obviously increases or decreases, the condition explains that the bridge structure is changed by extrusion or external environment corrosion and is in a dangerous state, and when the number slightly changes or does not change, the condition explains that the bridge structure is normal; and the one-dimensional Betti number describes the number of holes existing in the region of the cross section of the bridge, wherein when the number of the holes obviously increases, the condition explains that the number of the holes (namely bubbles) in the bridge structure increases and the bridge structure is in a dangerous state, and when the number slightly changes or does not change, the condition explains that the bridge structure is normal. Thus, the invention can quantitatively make an evaluation on the safety of the service bridge structure to effectively prevent accidents from occurring.

Description

technical field [0001] The invention relates to a method for evaluating the safety of in-service bridge structures, which is suitable for the safety detection of all in-service reinforced concrete bridge structures and belongs to the technical field of civil engineering. Background technique [0002] Bridge engineering is a major project related to people's livelihood. Because of its complex structure, difficult design and construction, and large investment, it has attracted much attention. After the bridge is completed and put into use, its reinforced concrete structure will gradually deteriorate and corrode under the influence of the natural environment, service environment and internal factors of the material as time goes by, and the structural performance will also decline and damage will occur. Even damage, thus endangering the safety of the bridge. Since the 1980s, many countries and regions in North America, Europe and Asia have successively experienced several large...

AI Technical Summary

Problems solved by technology

However, there is still very little work done on the durability testing and evaluation of prestressed concrete bridges in my country. Obviously insufficient or even blank

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