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IDENTIFICATION AND DETECTION OF A VOID UNDER HIGHWAY CEMENT CONCRETE PAVEMENT SLABS BASED ON FINITE ELEMENT ANALYSIS ; PREPOZNAVANJE I OPAŽANJE ŠUPLJINA ISPOD PLOČA KOLNIČKOGA CEMENTNOM OJAČANOGA BETONA NA PROMETNICAMA UPORABOM ANALIZE KONAČNIH ELEMENATA
For a city, the construction of a road is related to the development of economy, and the construction of a road includes maintenance of the road. Cement roads have been popularized in road construction due to their low construction cost and high strength, but at the same time, road problems have arisen. In order to solve and prevent the problem of voids under highway cement concrete pavement slabs, the acoustic vibration method was used for the detection of voids under highway cement concrete pavement slabs. This method was briefly introduced and analysed with finite element analysis. Then, excitation equipment and ABAQUS software were used to perform instance analysis on the section from K08-000 to K09-000 of G325 National Road. The results showed that there were three situations, including a mild void, normal void and serious void. The degree of abrupt change of the peak amplitude of the acoustic vibration characteristic curve increased with an increase in the severity of the void under the highway cement concrete pavement slabs. The void area was obtained through calculation of the sound pressure characteristic curve data based on the finite element model, with an error between 17.0 and 21.9%. However, in road maintenance projects, this error is acceptable. In summary, the acoustic vibration method based on finite element analysis can effectively detect the position of a void under highway cement concrete pavement slabs and estimate the area. ; Izgradnja prometnica u gradu povezana je s razvojem ekonomije, a uključuje i njihovo održavanje. Betonske prometnice, ojačane cementom, bile su često u uporabi zbog njihova maloga troška i velike trajnosti. Međutim postoje i problemi takvih konstrukcija. U cilju smanjivanja problema izazvanih šupljinama ispod takvih betonskih ploča ovdje je prikazana uporaba metode zvučnih vibracija. Njome opažene šupljine analizirane su metodom konačnih elemenata. Odgovarajućom opremom i programskim paketom ABAQUS analizirana je dionica nacionalne ceste od sekcije K09-000 do sekcije K09-000. Rezultati su pokazali tri slučaja – one s malim, uobičajenim i velikim šupljinama. Stupanj nagle promjene vršne amplitude zvučne vibracije povećavao se što su šupljine u podlozi ceste bile veće. Karakteristične krivulje odziva zvučnoga vala izračunane su metodom konačnih elemenata, uz pogrješku procjene 17 – 21,9 %. To je prihvatljiv iznos kod projekata održavanja prometnica. Time je metoda zvučnih vibracija te primjena analize konačnih elemenata pokazala svoju uporabivost kod određivanja smještaja šupljina u podini prometnica izgrađenih od cementom ojačanog betona.
IDENTIFICATION AND DETECTION OF A VOID UNDER HIGHWAY CEMENT CONCRETE PAVEMENT SLABS BASED ON FINITE ELEMENT ANALYSIS ; PREPOZNAVANJE I OPAŽANJE ŠUPLJINA ISPOD PLOČA KOLNIČKOGA CEMENTNOM OJAČANOGA BETONA NA PROMETNICAMA UPORABOM ANALIZE KONAČNIH ELEMENATA
For a city, the construction of a road is related to the development of economy, and the construction of a road includes maintenance of the road. Cement roads have been popularized in road construction due to their low construction cost and high strength, but at the same time, road problems have arisen. In order to solve and prevent the problem of voids under highway cement concrete pavement slabs, the acoustic vibration method was used for the detection of voids under highway cement concrete pavement slabs. This method was briefly introduced and analysed with finite element analysis. Then, excitation equipment and ABAQUS software were used to perform instance analysis on the section from K08-000 to K09-000 of G325 National Road. The results showed that there were three situations, including a mild void, normal void and serious void. The degree of abrupt change of the peak amplitude of the acoustic vibration characteristic curve increased with an increase in the severity of the void under the highway cement concrete pavement slabs. The void area was obtained through calculation of the sound pressure characteristic curve data based on the finite element model, with an error between 17.0 and 21.9%. However, in road maintenance projects, this error is acceptable. In summary, the acoustic vibration method based on finite element analysis can effectively detect the position of a void under highway cement concrete pavement slabs and estimate the area. ; Izgradnja prometnica u gradu povezana je s razvojem ekonomije, a uključuje i njihovo održavanje. Betonske prometnice, ojačane cementom, bile su često u uporabi zbog njihova maloga troška i velike trajnosti. Međutim postoje i problemi takvih konstrukcija. U cilju smanjivanja problema izazvanih šupljinama ispod takvih betonskih ploča ovdje je prikazana uporaba metode zvučnih vibracija. Njome opažene šupljine analizirane su metodom konačnih elemenata. Odgovarajućom opremom i programskim paketom ABAQUS analizirana je dionica nacionalne ceste od sekcije K09-000 do sekcije K09-000. Rezultati su pokazali tri slučaja – one s malim, uobičajenim i velikim šupljinama. Stupanj nagle promjene vršne amplitude zvučne vibracije povećavao se što su šupljine u podlozi ceste bile veće. Karakteristične krivulje odziva zvučnoga vala izračunane su metodom konačnih elemenata, uz pogrješku procjene 17 – 21,9 %. To je prihvatljiv iznos kod projekata održavanja prometnica. Time je metoda zvučnih vibracija te primjena analize konačnih elemenata pokazala svoju uporabivost kod određivanja smještaja šupljina u podini prometnica izgrađenih od cementom ojačanog betona.
IDENTIFICATION AND DETECTION OF A VOID UNDER HIGHWAY CEMENT CONCRETE PAVEMENT SLABS BASED ON FINITE ELEMENT ANALYSIS ; PREPOZNAVANJE I OPAŽANJE ŠUPLJINA ISPOD PLOČA KOLNIČKOGA CEMENTNOM OJAČANOGA BETONA NA PROMETNICAMA UPORABOM ANALIZE KONAČNIH ELEMENATA
Zhang, Tao (author) / Ren, Yongming (author)
2019-01-01
Rudarsko-geološko-naftni zbornik ; ISSN 1849-0409 (Online) ; Volume 34 ; Issue 3
Article (Journal)
Electronic Resource
English
DDC:
690
Analysis on Criterion for Void Identifying under Cement Concrete Pavement Corner
| British Library Conference Proceedings | 2009