桥梁短期实测数据修正高强混凝土收缩徐变模型与长期挠度预测

doi:10.3969/j.issn.1002-0268.2014.11.012

Abstract
Figure/Table
References (0)
Related Citation (15)

Abstract To investigate the laws of creep and shrinkage in high-strength concrete for long-span pre-stressed continuous box girder bridge and predict long-term deflection, strain sensors were embedded in the midspan of a box girder bridge. The shrinkage strain of concrete was then directly measured, and the creep strain was obtained using the incremental algorithm of measured data. The measured data show that if the creep and shrinkage model in the existing specification is used, then the shrinkage effect is underestimated as a whole and the creep effect is overrated for the C55 high-strength concrete of the bridge. The long-term deflection is predicted using the modified prediction models of creep and shrinkage that are based on short-term measured data when the bridge is under dead load. The deflection prediction values of two modified prediction models were compared with the measured deflection. Results of the comparison indicate that the integrality of the short-term measured strain data in concrete, measurement accuracy, and modified prediction model that is based on the measured data influence the prediction accuracy of the modified prediction models.

Key words： bridge engineering correction of creep and shrinkage strain identification concrete box girder bridge deflection prediction

Received: 03 January 2015

Fund:Supported by the Traffic Technology Project of Zhejiang Province (No.2011H17)

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZENG Ding
	XIE Jun
	ZHENG Xiao-hua
	REN Hong-wei
	WANG Guo-liang

Cite this article:

ZENG Ding,XIE Jun,ZHENG Xiao-hua, et al. Long-term Deflection Prediction and Correction of Creep and Shrinkage Model of High-strength Concrete Based on Short-term Measured Data for Bridge[J]. Journal of Highway and Transportation Research and Development, 2015, 9(3): 48-54.

URL:

http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/10.3969/j.issn.1002-0268.2014.11.012 OR http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/Y2015/V9/I3/48

[1] CHEN Can-ming, HUANG Wei-lan, LU Cai-rong et al. Creep of High-performance Concrete for Bridges and Its Application[J]. Hydro-science and Engineering, 2007(2):1-9(in Chinese).
[2] BROOKS J J, NEVILLE A M. Estimating Long-term Creep and Shrinkage from Short-term Test[J]. Magazine of Concrete Research, 1975, 27(90):3-12.
[3] SIRIVIVATNANON V. Predicting Long-term Creep from Short-term Test[J]. ACI Special Publication, 2005, 229:49-62.
[4] BAZANT Z P, PANULA L, KIM J K,et al. Improved Prediction Model for Time-dependent Deformations of Concrete:Part 6-Simplified Code-type Formulation[J]. Materials and Structures, 1992, 25:219-223.
[5] BAZANT Z P, XI Yun-ping, BAWEJA S. Improved Prediction Model for Time-dependent Deformations of Concrete:Part 7-Short Form of BP-KX Model Statistics and Extrapolation of Short Time Data[J]. Materials and Structures, 1993, 26:567-574.
[6] XU Hang, PENG Xiao-ming, ZOU Li-qun. Prediction Research of Long-term Creep for Bridge Concrete Based on Short-term Test[J]. Journal of Chongqing Jiaotong University:Natural Science Edition, 2010, 29(4):518-520. (in Chinese).
[7] OJDROVIC R P, ZARGHAMEE M S. Concrete Creep and Shrinkage Prediction from Short-term Tests[J]. ACI Materials Journal, 1996, 93(2):169-177.
[8] WANG Hui, QIAN Chun-xiang. Modification of Creep Prediction Models Based on Short-term Concrete Test Data of Sutong Bridge[J]. Bridge Construction, 2010(2):32-36(in Chinese).
[9] MENG Shao-ping, PAN Zuan-feng, WANG Hui, et al. Creep and Shrinkage Experiments and Analysis on High-performance Concrete of Sutong Bridge[J]. Modern Transportation Technology, 2009, 6(5):15-20. (in Chinese).
[10] ZHANG Yun-tao, MENG Shao-ping, HUI Zhuo, et al. Experimental Research on Concrete Creep for Main Girder of Continuous Rigid Frame Bridge of Sutong Bridge[J]. Journal of Highway and Transportation Research and Development, 2010, 27(4):101-104. (in Chinese).
[11] ZHANG Yun-tao, MENG Shao-ping, HUI Zhuo. Experimental Study on Creep and Shrinkage of High-performance Reinforced Concrete[J]. Building Science, 2010, 26(3):1-5. (in Chinese).
[12] ZHAO Qi-lin, CHEN li, ZHAI Ke-wei,et al. Creep and Shrinkage of High Strength Concrete for Bridges under Complex Condition[J]. Journal of PLA University of Science and Technology:Natural Science Edition, 2011, 12(5):459-465. (in Chinese).
[13] PAN Zuan-feng, LÜ Zhi-tao, LIU Zhao et al. Uncertainty Analysis of Creep and Shrinkage Effect in Continuous Rigid Frame of Sutong Bridge[J]. Engineering Mechanics, 2009, 26(9):67-73. (in Chinese).
[14] RILEM Technical Committees. Guidelines for Characterizing Concrete Creep and Shrinkage in Structural Design Codes or Recommendations[J]. Materials and Structures, 1995, 28:52-55.
[15] XIE Jun, ZENG Ding, ZHENG Xiao-hua. Long-term Deflection Prediction of Long-span Beam Bridge Based on Shrinkage Creep Self-identification[J]. Journal of Highway and Transportation Research and Development, 2013, 30(8):88-91. (in Chinese).
[16] KE Min-yong, LIU Hai-xiang, CHEN Can-ming et al. Prediction Model of Index Type Shrinkage and Creep for High-strength Concrete and Its Engineering Application[J]. Bridge Construction, 2011(4):49-52. (in Chinese).