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๊ฒ€์ฆ๋œ ํŒŒํŠธ๋„ˆ ์ œํœด์‚ฌ ์ž๋ฃŒ

Vibration-Based Monitoring of Prestress-Loss in PSC Girder Bridges

๋ฐฉ๋Œ€ํ•œ 850๋งŒ๊ฑด์˜ ์ž๋ฃŒ ์ค‘ ์ฃผ์ œ๋ณ„๋กœ ๋งŒ๋“ค์ˆ˜ ์žˆ๋Š” ์ตœ์ ์˜ ์‚ฐ์ถœ๋ฌผ์„ ํ•ดํ”ผ ์บ ํผ์Šค์—์„œ ์ฒดํ—˜ ํ•˜์„ธ์š” ์ „๋ฌธ๊ฐ€์˜ ์ง€์‹๊ณผ ์ธ์‚ฌ์ดํŠธ๋ฅผ ํ™œ์šฉํ•˜์—ฌ ์‰ฝ๊ณ  ํญ๋„“๊ฒŒ ์ดํ•ดํ•˜๊ณ  ์ ์šฉํ• ์ˆ˜ ์žˆ๋Š” ๊ธฐํšŒ๋ฅผ ๋†“์น˜์ง€ ๋งˆ์„ธ์š”
8 ํŽ˜์ด์งฟ’
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์ตœ์ดˆ๋“ฑ๋ก์ผ 2023.04.05 ์ตœ์ข…์ ฟ’์ž‘์ผ 2008.02
8P ๋ฏธ๋้ฉ๋ณด๊ธฐ
Vibration-Based Monitoring of Prestress-Loss in PSC Girder Bridges
  • * ๋ณธ ๋ฌธ์„œ๋Š” ๋ฐฐํฌ์šฉ์œผ๋กœ ๋ณต์‚ฌ ๋ฐ ํŽธ์ง‘์ด ๋ถˆ๊ฐ€ํ•ฉ๋‹ˆ๋‹ค.

    ๋ฏธ๋้ฉ๋ณด๊ธฐ

    ์„œ์่ง์ •๋ต–

    ยท ๋ฐœํ–‰๊ธฐ๊ด€ : ํ•œ๊ตญ์ „์‚ฐ๊ตฌ์กฐ๊ณตํ•™ํšŒ
    ยท ์ˆ˜๋ก์ง€ ์ •๋ณด : ํ•œ๊ตญ์ „์‚ฐ๊ตฌ์กฐ๊ณตํ•™ํšŒ ๋…ผ๋ๅฉ์ง‘ / 21๊ถŒ / 1ํ˜ธ
    ยท ์ €์ž๋ช… : ๊น€์ •ํƒœ, ํ™๋™์ˆ˜, ๋ฐ•์žฌํ˜•, ์กฐํ˜„๋งŒ

    ์ดˆ๋ก

    ๋ณธ ๋…ผ๋ๅฉ์—์„œ๋Š” ํ”„๋ฆฌ์ŠคํŠธ๋ ˆ์Šค ์ฝ˜ํฌ๋ฆฌํŠธ(PSC) ๊ฑฐ๋”๊ต์˜ ๊ธด์žฅ๋ ฅ ์†์‹ค์„ ์˜ˆ์ธกํ•˜๊ธฐ ์œ„ํ•œ ์ง„๋™๊ธฐ๋ฐ˜ ๋ชจ๋‹ˆํ„ฐ๋ง ์ฒด๊ณ„๋ฅผ ์ œ์•ˆํ•˜์˜€๋‹ค. ์ œ์•ˆํ•œ ์ฒด๊ณ„๋Š” ๊ธด์žฅ๋ ฅ ์†์‹ค ๊ฒฝ๋ณด ๋‹จ๊ณ„์™ฟ’ ๊ธด์žฅ๋ ฅ ์†์‹ค ์ •๋„๋ฅผ ํ‰๊ฐ€ํ•˜๋Š” ๋‹จ๊ณ„๋กœ ๊ตฌ์„ฑํ•˜์˜€๋‹ค. ๋จผ์ €, ๊ธด์žฅ๋ ฅ ์†์‹ค ๊ฒฝ๋ณด๋ฅผ ์œ„ํ•ด ๋‘ ์œ„์น˜์—์„œ ์ทจ๋“๋œ ์ฃผํŒŒ์ˆ˜ ์‘๋‹ต์˜ ๋ณ€ํ™”๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๊ธด์žฅ๋ ฅ ์†์‹ค์˜ ๋ฐœ์ƒ์„ ๋ชจ๋‹ˆํ„ฐ๋งํ•˜๋Š” ์ƒˆ๋กœ์šด ์ „์—ญ์  ์†์ƒ๊ฒฝ๋ณด๊ธฐ๋ฒ•์„ ์ œ์•ˆํ•˜์˜€๋‹ค. ์ œ์•ˆ๋œ ๊ธฐ๋ฒ•์€ ์‘๋‹ต์‹ ํ˜ธ์˜ ํŒŒ์›Œ์ŠคํŽ™ํŠธ๋Ÿผ๋งŒ์„ ์ด์šฉํ•˜๊ธฐ ๋•Œ๋ฌธ์— ๋ณ„๋„์˜ ๋ชจ๋“œํ•ด์„๊ณผ์ • ์—†์ด ์‹ค์‹œ๊ฐ„์œผ๋กœ ์†์ƒ๊ฒฝ๋ณด๊ฐ€ ๊ฐ€๋Šฅํ•˜๋‹ค. ๋‹ค์Œ์œผ๋กœ, ๊ธด์žฅ๋ ฅ ์†์‹ค ์ •๋„๋ฅผ ํ‰๊ฐ€ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ๊ณ ์œ ์ง„๋™์ˆ˜์˜ ๋ณ€ํ™”๋กœ๋ถ€ํ„ฐ ๊ธด์žฅ๋ ฅ์˜ ์ƒ๋Œ€์ ์ธ ์†์‹ค ์ •๋„๋ฅผ ํ‰๊ฐ€ํ•  ์ˆ˜ ์žˆ๋Š” ๊ธด์žฅ๋ ฅ ์†์‹ค ์˜ˆ์ธก ๊ธฐ๋ฒ•์„ ์„ ์ •ํ•˜์˜€๋‹ค. ์ œ์•ˆ๋œ ์ฒด๊ณ„์˜ ์œ ์šฉ์„ฑ์„ ์ถ•์†Œ ๋ชจํ˜• PSC ๊ฑฐ๋”์— ๋Œ€ํ•œ ์‹คํ—˜์„ ํ†ตํ•ด ํ‰๊ฐ€ํ•˜์˜€๋‹ค.

    ์˜์–ด์ดˆ๋ก

    A vibration-based monitoring system is newly proposed to predict the loss of prestress forces in prestressed concrete (PSC) girder bridges. Firstly, a global damage alarming algorithm is newly proposed to monitor the occurrence of prestress-loss by using the change in frequency responses. Secondly, a prestress-loss prediction algorithm is selected to estimate the extent of prestress-loss by using the change in natural frequencies. Finally, the feasibility of the proposed system is experimentally evaluated on a scaled PSC girder model for which acceleration responses were measured for several damage scenarios of prestress-loss.

    ์ฐธ๊ณ ์ž๋ฃŒ

    ยท ์—†์Œ
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    • ์ž์ฃผ๋ฌป๋Š”์งˆ๋ๅฉ์˜ ๋‹ต๋ณ€์„ ํ™•์ธํ•ด ์ฃผ์„ธ์š”

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      ๊ผญ ์•Œ์•„์ฃผ์„ธ์š”

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      • ํ•ดํ”ผ์บ ํผ์Šค๋Š” ๊ตฌ๋งค์ž์™ฟ’ ํŒ๋งค์ž ๋ชจ๋‘๊ฐ€ ๋งŒ์กฑํ•˜๋Š” ์„œ๋น„์Šค๊ฐ€ ๋˜๋„๋ก ๋…ธ๋ ฅํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์•„๋ž˜์˜ 4๊ฐ€์ง€ ์ž๋ฃŒํ™˜๋ถˆ ์กฐ๊ฑด์„ ๊ผญ ํ™•์ธํ•ด์ฃผ์‹œ๊ธฐ ๋ฐ”๋ž๋‹ˆ๋‹ค.
        ํŒŒ์ผ์˜ค๋ฅ˜ ์ค‘๋ณต์ž๋ฃŒ ์ €์ž‘๊ถŒ ์—†์Œ ์„ค๋ช…๊ณผ ์‹ค์ œ ๋‚ด์šฉ ๋ถˆ์ผ์น˜
        ํŒŒ์ผ์˜ ๋‹ค์šด๋กœ๋“œ๊ฐ€ ์ œ๋Œ€๋กœ ๋˜์ง€ ์•Š๊ฑฐ๋‚˜ ํŒŒ์ผํ˜•์‹์— ๋งž๋Š” ํ”„๋กœ๊ทธ๋žจ์œผ๋กœ ์ •์ƒ ์ž‘๋™ํ•˜์ง€ ์•Š๋Š” ๊ฒฝ์šฐ ๋‹ค๋ฅธ ์ž๋ฃŒ์™ฟ’ 70% ์ด์ƒ ๋‚ด์šฉ์ด ์ผ์น˜ํ•˜๋Š” ๊ฒฝ์šฐ (์ค‘๋ณต์ž„์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋Š” ๊ทผ๊ฑฐ ํ•„์š”ํ•จ) ์ธํ„ฐ๋„ท์˜ ๋‹ค๋ฅธ ์‚ฌ์ดํŠธ, ์—ฐ๊ตฌ๊ธฐ๊ด€, ํ•™๊ป“, ์„œ์  ๋“ฑ์˜ ์ž๋ฃŒ๋ฅผ ๋„์šฉํ•œ ๊ฒฝ์šฐ ์ž๋ฃŒ์˜ ์„ค๋ช…๊ณผ ์‹ค์ œ ์ž๋ฃŒ์˜ ๋‚ด์šฉ์ด ์ผ์น˜ํ•˜์ง€ ์•Š๋Š” ๊ฒฝ์šฐ

    โ€œํ•œ๊ตญ์ „์‚ฐ๊ตฌ์กฐ๊ณตํ•™ํšŒ ๋…ผ๋ๅฉ์ง‘โ€์˜ ๋‹ค๋ฅธ ๋…ผ๋ๅฉ๋„ ํ™•์ธํ•ด ๋ณด์„ธ์š”!

    ์ฐพ์œผ์‹œ๋˜ ์ž๋ฃŒ๊ฐ€ ์•„๋‹Œ๊ฐ€์š”?

    ์ง€๊ธˆ ๋ณด๋Š” ์ž๋ฃŒ์™ฟ’ ์—ฐ๊ด€๋˜์–ด ์žˆ์–ด์š”!
    ์™ผ์ชฝ ํ™”์‚ดํ‘œ
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    ๋ฌธ์„œ ์ดˆ์•ˆ์„ ์ƒ์„ฑํ•ด์ฃผ๋Š” EasyAI
    ์•ˆ๋…•ํ•˜์„ธ์š”. ํ•ดํ”ผ์บ ํผ์Šค์˜ ๋ฐฉ๋Œ€ํ•œ ์ž๋ฃŒ ์ค‘์—์„œ ์„ ๋ณ„ํ•˜์—ฌ ๋‹น์‹ ๋งŒ์˜ ์ดˆ์•ˆ์„ ๋งŒ๋“ค์–ด์ฃผ๋Š” EasyAI ์ž…๋‹ˆ๋‹ค.
    ์ €๋Š” ์•„๋ž˜์™ฟ’ ๊ฐ™์ด ์ž‘์—…์„ ๋„์™ฟ’๋“œ๋ฆฝ๋‹ˆ๋‹ค.
    - ์ฃผ์ œ๋งŒ ์ž…๋ ฅํ•˜๋ฉด ๋ชฉ์ฐจ๋ถ€ํ„ฐ ๋ณธ๋ฌธ๋‚ด์šฉ๊นŒ์ง€ ์ž๋™ ์ƒ์„ฑํ•ด ๋“œ๋ฆฝ๋‹ˆ๋‹ค.
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    - ์Šคํ† ์–ด์—์„œ ๋ฌด๋ฃŒ ์บ์‹œ๋ฅผ ๊ณ„์ •๋ณ„๋กœ 1ํšŒ ๋ฐœ๊ธ‰ ๋ฐ›์„ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ง€๊ธˆ ๋ฐ”๋กœ ์ฒดํ—˜ํ•ด ๋ณด์„ธ์š”!
    ์ด๋Ÿฐ ์ฃผ์ œ๋“ค์„ ์ž…๋ ฅํ•ด ๋ณด์„ธ์š”.
    - ์œ ์•„์—๊ฒŒ ์ ํ•ฉํ•œ ๋ฌธํ•™์ž‘ํ’ˆ์˜ ๊ธฐ์ค€๊ณผ ํŠน์„ฑ
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