Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions
The temperature change caused by hydration leads to early-age cracking in concrete box girder. The early-age cracking risk is further improved with low air temperature and large daily temperature difference, especially in Northwest China. To fill this gap, a temperature experiment and numerical simu...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2023-08-01
|
| Series: | Journal of Traffic and Transportation Engineering (English ed. Online) |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S209575642300082X |
| _version_ | 1797739008670826496 |
|---|---|
| author | Shi Han Yongjian Liu Yi Lyu Jiang Liu Ning Zhang |
| author_facet | Shi Han Yongjian Liu Yi Lyu Jiang Liu Ning Zhang |
| author_sort | Shi Han |
| collection | DOAJ |
| description | The temperature change caused by hydration leads to early-age cracking in concrete box girder. The early-age cracking risk is further improved with low air temperature and large daily temperature difference, especially in Northwest China. To fill this gap, a temperature experiment and numerical simulation were performed on an actual concrete box girder segment in Northwest China. The temperature field, thermal stress and cracking risk were analyzed using evolution curves, distribution curves and contours. The key parameters that influence the hydration heat temperature, including the cement hydration heat release, cement content, height-width ratio of web, initial temperature, convective coefficient of top plate surface, were analyzed. An anti-cracking case based on parameters analysis was put forward. The results indicated that the temperature evolution can be divided into three stages: warming, cooling and environment significantly impacting. Along the thickness of each plate, temperature distributed is single peak in the center. Along the width or height, temperature distributed is double peaks at axillary position for the top and bottom plates, and single peak in center for the web. The axillary position and web have high thermal stress and significant cracking risks. The temperature difference of each plate, and the early-age cracking risk can be reduced by effectively adjusting the key parameters. Among these, the former two parameters are the most significant factors. The maximum cracking risk can be decreased by 15.7% for every 50 kJ/kg hydration heat reduction. The maximum cracking risk can be decreased by 13.1% for every 50 kg/m3 cement content reduction. |
| first_indexed | 2024-03-12T13:51:09Z |
| format | Article |
| id | doaj.art-95e7de662c8e4d2a9966b184546d8b61 |
| institution | Directory Open Access Journal |
| issn | 2095-7564 |
| language | English |
| last_indexed | 2024-03-12T13:51:09Z |
| publishDate | 2023-08-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Traffic and Transportation Engineering (English ed. Online) |
| spelling | doaj.art-95e7de662c8e4d2a9966b184546d8b612023-08-23T04:33:02ZengKeAi Communications Co., Ltd.Journal of Traffic and Transportation Engineering (English ed. Online)2095-75642023-08-01104697720Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regionsShi Han0Yongjian Liu1Yi Lyu2Jiang Liu3Ning Zhang4School of Highway, Chang'an University, Xi'an 710064, China; Qinghai Transportation Engineering Technical Service Center, Xining 810008, ChinaSchool of Highway, Chang'an University, Xi'an 710064, China; School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Highway, Chang'an University, Xi'an 710064, ChinaSchool of Highway, Chang'an University, Xi'an 710064, China; Corresponding author.College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling 712100, ChinaThe temperature change caused by hydration leads to early-age cracking in concrete box girder. The early-age cracking risk is further improved with low air temperature and large daily temperature difference, especially in Northwest China. To fill this gap, a temperature experiment and numerical simulation were performed on an actual concrete box girder segment in Northwest China. The temperature field, thermal stress and cracking risk were analyzed using evolution curves, distribution curves and contours. The key parameters that influence the hydration heat temperature, including the cement hydration heat release, cement content, height-width ratio of web, initial temperature, convective coefficient of top plate surface, were analyzed. An anti-cracking case based on parameters analysis was put forward. The results indicated that the temperature evolution can be divided into three stages: warming, cooling and environment significantly impacting. Along the thickness of each plate, temperature distributed is single peak in the center. Along the width or height, temperature distributed is double peaks at axillary position for the top and bottom plates, and single peak in center for the web. The axillary position and web have high thermal stress and significant cracking risks. The temperature difference of each plate, and the early-age cracking risk can be reduced by effectively adjusting the key parameters. Among these, the former two parameters are the most significant factors. The maximum cracking risk can be decreased by 15.7% for every 50 kJ/kg hydration heat reduction. The maximum cracking risk can be decreased by 13.1% for every 50 kg/m3 cement content reduction.http://www.sciencedirect.com/science/article/pii/S209575642300082XBridge engineeringConcrete box girderHydration heatCold regionTemperature actionThermal stress |
| spellingShingle | Shi Han Yongjian Liu Yi Lyu Jiang Liu Ning Zhang Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions Journal of Traffic and Transportation Engineering (English ed. Online) Bridge engineering Concrete box girder Hydration heat Cold region Temperature action Thermal stress |
| title | Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions |
| title_full | Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions |
| title_fullStr | Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions |
| title_full_unstemmed | Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions |
| title_short | Numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions |
| title_sort | numerical simulation investigation on hydration heat temperature and early cracking risk of concrete box girder in cold regions |
| topic | Bridge engineering Concrete box girder Hydration heat Cold region Temperature action Thermal stress |
| url | http://www.sciencedirect.com/science/article/pii/S209575642300082X |
| work_keys_str_mv | AT shihan numericalsimulationinvestigationonhydrationheattemperatureandearlycrackingriskofconcreteboxgirderincoldregions AT yongjianliu numericalsimulationinvestigationonhydrationheattemperatureandearlycrackingriskofconcreteboxgirderincoldregions AT yilyu numericalsimulationinvestigationonhydrationheattemperatureandearlycrackingriskofconcreteboxgirderincoldregions AT jiangliu numericalsimulationinvestigationonhydrationheattemperatureandearlycrackingriskofconcreteboxgirderincoldregions AT ningzhang numericalsimulationinvestigationonhydrationheattemperatureandearlycrackingriskofconcreteboxgirderincoldregions |