Calibrating and validating a FE model for long-term behavior of RC beams
Kalibracija i verifikacija modela konačnih elemenata za dugotrajno ponašanje AB greda
Abstract
This study presents the research carried out in finding an optimal finite element (FE) model for calculating the long-term behavior of reinforced concrete (RC) beams. A multi-purpose finite element software DIANA was used. A benchmark test in the form of a simply supported beam loaded in four point bending was selected for model calibration. The result was the choice of 3-node beam elements, a multi-directional fixed crack model with constant stress cut-off, nonlinear tension softening and constant shear retention and a creep and shrinkage model according to CEB-FIP Model Code 1990. The model was then validated on 14 simply supported beams and 6 continuous beams. Good agreement was found with experimental results (within ±15%).
U ovom radu je predstavljeno istraživanje sprovedeno u svrhu pronalaženja optimalnog modela konačnih elemenata za predviđanje ponašanja armirano-betonskih greda pod dugotrajnim opterećenjem. U istraživanju je korišćen višenamenski komercijalni softver DIANA. Za kalibraciju modela je odabran benčmark test u vidu proste grede opterećene savijanjem u četiri tačke. Kao rezultat kalibracije, odabrani model se sastojao od linijskih konačnih elemenata sa tri čvora. Odabran je model fiksne prsline u više pravaca. Sadejstvo zategnutog betona izmenu prslina opisano je nelinearnom funkcijom. Odabrana je konstantna rezidualna nosivost pri smicanju. Skupljanje i tečenje je modelirano prema CEB-FIP Model Code 1990. Model je dodatno verifikovan na 14 prostih greda i 6 kontinualnih greda sa dva polja. Rezultati su pokazali dobro slaganje sa eksperimentalnim vrednostima (±15%).
Keywords:
creep / shrinkage / reinforced concrete / beams / FE / tečenje / skupljanje / armirani beton / grede / konačni elementiSource:
Tehnika, 2014, 69, 3, 385-392Publisher:
- Savez inženjera i tehničara Srbije, Beograd
Funding / projects:
- Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-MESTD-Technological Development (TD or TR)-36017)
Institution/Community
GraFarTY - JOUR AU - Tošić, Nikola AU - Marinković, Snežana PY - 2014 UR - https://grafar.grf.bg.ac.rs/handle/123456789/565 AB - This study presents the research carried out in finding an optimal finite element (FE) model for calculating the long-term behavior of reinforced concrete (RC) beams. A multi-purpose finite element software DIANA was used. A benchmark test in the form of a simply supported beam loaded in four point bending was selected for model calibration. The result was the choice of 3-node beam elements, a multi-directional fixed crack model with constant stress cut-off, nonlinear tension softening and constant shear retention and a creep and shrinkage model according to CEB-FIP Model Code 1990. The model was then validated on 14 simply supported beams and 6 continuous beams. Good agreement was found with experimental results (within ±15%). AB - U ovom radu je predstavljeno istraživanje sprovedeno u svrhu pronalaženja optimalnog modela konačnih elemenata za predviđanje ponašanja armirano-betonskih greda pod dugotrajnim opterećenjem. U istraživanju je korišćen višenamenski komercijalni softver DIANA. Za kalibraciju modela je odabran benčmark test u vidu proste grede opterećene savijanjem u četiri tačke. Kao rezultat kalibracije, odabrani model se sastojao od linijskih konačnih elemenata sa tri čvora. Odabran je model fiksne prsline u više pravaca. Sadejstvo zategnutog betona izmenu prslina opisano je nelinearnom funkcijom. Odabrana je konstantna rezidualna nosivost pri smicanju. Skupljanje i tečenje je modelirano prema CEB-FIP Model Code 1990. Model je dodatno verifikovan na 14 prostih greda i 6 kontinualnih greda sa dva polja. Rezultati su pokazali dobro slaganje sa eksperimentalnim vrednostima (±15%). PB - Savez inženjera i tehničara Srbije, Beograd T2 - Tehnika T1 - Calibrating and validating a FE model for long-term behavior of RC beams T1 - Kalibracija i verifikacija modela konačnih elemenata za dugotrajno ponašanje AB greda EP - 392 IS - 3 SP - 385 VL - 69 DO - 10.5937/tehnika1403385T ER -
@article{ author = "Tošić, Nikola and Marinković, Snežana", year = "2014", abstract = "This study presents the research carried out in finding an optimal finite element (FE) model for calculating the long-term behavior of reinforced concrete (RC) beams. A multi-purpose finite element software DIANA was used. A benchmark test in the form of a simply supported beam loaded in four point bending was selected for model calibration. The result was the choice of 3-node beam elements, a multi-directional fixed crack model with constant stress cut-off, nonlinear tension softening and constant shear retention and a creep and shrinkage model according to CEB-FIP Model Code 1990. The model was then validated on 14 simply supported beams and 6 continuous beams. Good agreement was found with experimental results (within ±15%)., U ovom radu je predstavljeno istraživanje sprovedeno u svrhu pronalaženja optimalnog modela konačnih elemenata za predviđanje ponašanja armirano-betonskih greda pod dugotrajnim opterećenjem. U istraživanju je korišćen višenamenski komercijalni softver DIANA. Za kalibraciju modela je odabran benčmark test u vidu proste grede opterećene savijanjem u četiri tačke. Kao rezultat kalibracije, odabrani model se sastojao od linijskih konačnih elemenata sa tri čvora. Odabran je model fiksne prsline u više pravaca. Sadejstvo zategnutog betona izmenu prslina opisano je nelinearnom funkcijom. Odabrana je konstantna rezidualna nosivost pri smicanju. Skupljanje i tečenje je modelirano prema CEB-FIP Model Code 1990. Model je dodatno verifikovan na 14 prostih greda i 6 kontinualnih greda sa dva polja. Rezultati su pokazali dobro slaganje sa eksperimentalnim vrednostima (±15%).", publisher = "Savez inženjera i tehničara Srbije, Beograd", journal = "Tehnika", title = "Calibrating and validating a FE model for long-term behavior of RC beams, Kalibracija i verifikacija modela konačnih elemenata za dugotrajno ponašanje AB greda", pages = "392-385", number = "3", volume = "69", doi = "10.5937/tehnika1403385T" }
Tošić, N.,& Marinković, S.. (2014). Calibrating and validating a FE model for long-term behavior of RC beams. in Tehnika Savez inženjera i tehničara Srbije, Beograd., 69(3), 385-392. https://doi.org/10.5937/tehnika1403385T
Tošić N, Marinković S. Calibrating and validating a FE model for long-term behavior of RC beams. in Tehnika. 2014;69(3):385-392. doi:10.5937/tehnika1403385T .
Tošić, Nikola, Marinković, Snežana, "Calibrating and validating a FE model for long-term behavior of RC beams" in Tehnika, 69, no. 3 (2014):385-392, https://doi.org/10.5937/tehnika1403385T . .