CORRELATION ANALYSIS BETWEEN FREQUENCY AND BRIDGE SPAN BASED ON DYNAMIC TEST
Article Sidebar
Main Article Content
Abstract
The population of bridges on National Road in 2020 has reached 21,054 units with a total length of 587,309 meters. About 10.5% of bridges have a service life of less than 10 years, 68.1% in the range of 10 - 50 years, and 5.3% more than 50 years. As the service life increases, the condition of the bridge will decrease. This bridge condition is obtained from the results of a detailed inspection using the visual method. The accuracy of this method is highly dependent on the objectivity, ability, and experience of the bridge inspector. The large population of bridges, variations in service life and conditions, and limited experienced inspectors are obstacles in conventional bridge inspections. As an alternative, the dynamic test method can be used to check bridge conditions more quickly and accurately. The natural frequency of the dynamic test can be used to determine the integrity condition and the level of structural damage, by comparing it to the theoretical frequency. So far, the theoretical frequency is determined based on calculations or structural modeling. The limited data of technical specifications, design drawings, and as-built drawings are often an obstacle. Experience and special skills are also needed in calculating or modeling this structure. This study aims to analyze the correlation between frequency and bridge span based on bridge dynamic test data in Indonesia. The results obtained a mathematical formula, where the value of the frequency of the bridge is correlated to the span of the bridge with a correlation coefficient of -0.85. This coefficient shows that the relationship between the variables under consideration is very strong and inverse, where the longer the bridge span, the smaller the vertical frequency value of the bridge.
Keywords: Dynamic Test, Bridge Span, Vertical Frequency, Correlation Analysis, Mathematical Formula
Article Details
Authors who publish in this journal agree to the following terms:
-
Authors retain copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License, which allows others to share the work with acknowledgment of the work's authorship and initial publication in this journal.
-
Authors may enter into additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with acknowledgment of its initial publication in this journal.
-
Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) as it can lead to productive exchanges, as well as earlier and greater citation of the published work.
Each submitted manuscript must be accompanied by a "Manuscript Originality Statement" and a "Copyright Transfer Statement".