|
|
|
| Comprehensive Simulation Method on Shrinkage and Creep Effects of Concrete in Structures of Bridge during Whole Time-varying Process |
| WANG Long-fei |
1. Gansu Provincial Transportation Planning, Survey & Design Institute Co., Ltd., Lanzhou Gansu 730030, China;
2. School of Highway, Chang'an University, Xi'an Shaanxi 710064, China |
|
|
|
|
Abstract A comprehensive simulation method on shrinkage and creep effects of concrete during time-varying process which is relatively precise, simple and practical is studied, considering that the effects vary and interact each other during time, in order to analyze shrinkage and creep effects of concrete structures in continuous and composite bridges with complex construction stages to ensure their safety. The finite element incremental method is applied as theoretical basis, which works through calculating and accumulating the results in every incremental load step. By setting time steps according to incremental loads, the finite element incremental method can simulate well shrinkage and creep effects on concrete structures during whole time-varying process. Secondary development is carried out with APDL to improve the calculating approach of temperature effects and the metal creep criteria in the finite element software ANSYS, so a finite element comprehensive simulation method is formed for calculating simultaneously shrinkage and creep effects of concrete in structures of bridge during whole time-varying process. Using standard shrinkage and creep models in specifications, shrinkage and creep effects of a concrete column with multiple loading cases are analyzed simulatedly and theoretically during time-varying process. Appling an experimental creep model, creep effects are computed on experimental non-glued prestressed beams of high performance fly ash concrete. The results are studied by comparing them between simulation and theory and between simulation and experiment. The result shows that shrinkage and creep effects obtained by the comprehensive simulation method display obvious characters of loading stages and time-varying process, the simulation results are in good agreement with the theoretical calculation results during the whole time-varying process. The result also shows that the comprehensive simulation method can easily be combined with experiment, and can make full use of findings of experimental researches, and the calculated results from this method are in good agreement with those measured values of modal beams in the experiment. Therefore, the comprehensive simulation method is completely feasible and easy to connect with specifications and experimental researches, and the whole calculation can be conducted automatically with the finite element software, so the method is very convenient and easy for wide application.
|
|
Received: 17 December 2021
|
| Fund:Supported by the Scientific Research Project of Gansu Provincial Department Transportation (No. 2016-34), Gansu Provincial Science and Technology Major Project (No. 19ZD2GA002) |
|
Corresponding Authors:
WANG Long-fei
E-mail: wanglongfei76@126.com
|
|
|
|
[1] NIE Jian-guo,TAO Mu-xuan,WU Li-li,et al. Advances of Research on Steel-concrete Composite Bridges[J].China Civil Engineering Journal,2012,45(6):110-122. (in Chinese)
[2] JTG/T D64-01-2015, Specifications for Design and Construction of Highway Steel-concrete Composite Bridge[S]. (in Chinese)
[3] XUE Wei-chen,HU Yu-ming,WANG Wei. Experiment on Creep Behaviors of Prestressed Concrete Beams[J].China Journal of Highway and Transport,2008,21(4):61-66. (in Chinese)
[4] MASOVIC S R, STOVIC S R, PECIC N P. Research of Long-term Behaviour of Non-prestressed Precast Concrete Beams Made Continuous[J]. Engineering Structures,2014,70:11-22.
[5] LIU Mu-yu, LU Zhi-fang. Shrinkage and Creep Analysis of Concrete Bridges with Time Variation and Uncertainty Considered[J]. Journal of Huanzhong University of Science and Technology:Natural Science Edition,2011,39(10):116-120. (in Chinese)
[6] HUANG Hai-dong, XIANG Zhong-fu. Nonlinear Creep Analysis Method for Concrete Structures[J]. Engineering Mechanics, 2014,31(2):69-102. (in Chinese)
[7] XIANG Yi-qiang, HE Xiao-yang. Time-dependent Behavior of PC Box Girder Bridges Considering Non-uniform Shrinkage and Creep[J]. Journal of HARBIN Institute of Technology, 2015,47(12):117-122. (in Chinese)
[8] CHEN Tai-cong,SU Cheng,HAN Da-jian. Simulation Calculation of Creep and Shrinkage Effects of Concrete during Segmental Construction of Bridges[J]. China Journal of Highway and Transport, 2003,16(4):55-58. (in Chinese)
[9] ZENG Ding,XIE Jun,ZHENG Xiao-hua,et al. Prediction of Long-term Deflection and Correction of Shrinkage and Creep Model of High-strength Concrete of Bridge Based on Measured Short-term Data[J]. Journal of Highway and Transportation Research and Development, 2014,31(11):72-77. (in Chinese)
[10] WANG Chun-shen,ZHU Jing-wei,ZHAI Xiao-liang, et al. Flexural Behavior Experiment of Steel and Concrete Composite Girder with Double Tubular Flanges[J].China Journal of Highway and Transport,2017,30(3):147-158. (in Chinese)
[11] LI Li-feng, WANG Fang, LIU Zhi-cai. Study on the Creep Behavior of Externally Prestressed Composite Beam with Corrugated Steel Webs[J]. Journal of Hunan University:Natural Science Edition, 2008,35(5):1-5. (in Chinese)
[12] LIU Xiao-gang,FAN Jian-sheng,NIE Jian-guo. Research on Flexual Capacity and Deflection of Prestressed Concrete Beams with Corrugated Steel Webs[J]. Journal of Building Structures,2013,34(S1):28-32. (in Chinese)
[13] FAN Jian-sheng,NIE Jian-guo, WANG Hao. Long-term Behavior of Composite Beams with Shrinkage, Creep and Cracking (I):Experiment and Calculation[J]. China Civil Engineering Journal, 2009,42(3):8-15. (in Chinese)
[14] FAN Jian-sheng, NIE Xin, LI Quan-wang. Long-term Behavior of Composite Beams with Shrinkage, Creep and Cracking(Ⅱ):Theoretical Analysis[J]. China Civil Engineering Journal, 2009,42(3):16-22. (in Chinese)
[15] AL-DEEN S, RANZI G, VRCELJ Z. Full-scale Long-term Experiments of Simply Supported Composite Beams with Solid Slabs[J].Journal of Constructional Steel Research,2011,67(3):308-321.
[16] AMADIO C, FRAGIACOMO M, MACORINI L. Evaluation of the Deflection of Steel-concrete Composite Beams at Serviceability Limit State[J]. Journal of Constructional Steel Research,2012,73:95-104.
[17] LIU Ya-ru, LIU Xiao-jie. Long-term Deflection of Steel-concrete Composite Box-beam due to Creep[J]. Journal of Railway Science and Engineering,2015,12(2):317-322. (in Chinese)
[18] YANG Fei,TAN Shao-hua,LIU Dian-yuan,et al. Analysis on Influence of Shrinkage Creep and Slip Effect on Composite Continuous Beam Bridge[J]. Journal of Highway and Transportation Research and Development, 2017,34(s1):1-14. (in Chinese)
[19] XIANG HAI-fan. Advanced Theory of Bridge Structure[M]. Beijing:China Communications Press,2001. (in Chinese)
[20] WANG Xu-cheng. Finite Element Method[M]. Beijing:Tsinghua University Press,2003. (in Chinese)
[21] JTG 3362-2018, Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts[S]. (in Chinese)
[22] LUO Xu-guo, ZHONG Xin-gu, DAI Gong-lian. Experimental Study on the Deformations for Shrinkage and Creep of Beams in Non-glued Prestressed High Performance Fly Ash Concrete Bridges[J]. Engineering Mechanics, 2006,23(7):136-141. (in Chinese) |
|
|
|
2021, Vol. 15 
