PC箱梁桥不均匀收缩控制技术研究

doi:10.3969/j.issn.1674-0696.2019.03.01

重庆交通大学学报（自然科学版） ›› 2019, Vol. 38 ›› Issue (03): 1-8.DOI: 10.3969/j.issn.1674-0696.2019.03.01

• 桥梁与隧道工程 • 下一篇

PC箱梁桥不均匀收缩控制技术研究

黄海东1，侯旭2

(1. 重庆交通大学土木建筑学院，重庆400074; 2. 西安瑞通路桥科技有限责任公司，陕西西安 710075)

收稿日期:2018-03-27 修回日期:2018-10-27 出版日期:2019-03-20 发布日期:2019-03-20
作者简介:黄海东(1978—)，男，辽宁清原人，副教授，博士，主要从事桥梁结构理论方面的研究。E-mail:hhdhao@163.com。
基金资助:
高等学校博士学科点专项科研基金项目（20125522120001）

Control Technology of Non-uniform Shrinkage of PC Box-Girder Bridges

HUANG Haidong1, HOU Xu2

(1.School of Civil Enginering & Architecture, Chongqing Jiaotong University, Chongqing 400074, P. R. China; 2. Xian Ruitong Bridge & Road Technology Co., Ltd., Xian 710075, Shaanxi, P. R. China)

Received:2018-03-27 Revised:2018-10-27 Online:2019-03-20 Published:2019-03-20

摘要/Abstract

摘要： 混凝土箱梁截面不均匀收缩对结构长期行为影响显著，但目前尚无有效控制方法。从混凝土干燥收缩变形机理出发，针对大跨度PC箱梁桥长期收缩变形特征，提出一种通过结构表面设置封闭涂层的收缩变形控制新思路，实现PC箱梁桥长期不均匀收缩变形控制。模型试验验证了该方法的合理性及可靠性，试验中综合考虑结构外形尺寸、混凝土水灰比及封闭涂层方式等因素。以江津长江大桥为例，开展了封闭涂层试设计，并进行了环境湿度、涂装时间等参数敏感性分析。分析结果表明：通过在箱梁表面设置封闭涂层可以有效降低结构干燥收缩变形、控制结构收缩挠曲变形方向。

关键词: 梁桥工程, 混凝土箱梁桥, 封闭涂层, 不均匀收缩, 长期结构行为, 收缩变形控制

Abstract: Non-uniform shrinkage of concrete box-girder cross-section has remarkable effect on the long-term structure behavior, which hasnt been solved till now. Based on the mechanism of drying shrinkage deformation of concrete and the characteristics of long-term shrinkage deformation of long-span PC box girder bridges, a new idea to control the long-term non-uniform shrinkage deformation of PC box girder bridges by setting a sealing coating on the surface of the structure was proposed. The rationality and reliability of the proposed method was verified by model test, in which factors such as the shape size of the structure, the water-cement ratio of concrete and the way of sealing coating were considered comprehensively. Taking the Jiangjin Yangtze River Bridge as an example, the test design of sealing coating was carried out, and the sensitivity analysis of environmental humidity, painting time and other parameters was carried out. The analysis results show that the drying shrinkage deformation can be effectively reduced and the direction of structural shrinkage and flexure deformation can be controlled by setting a sealing coating on the surface of box girder.

Key words: bridge enginering, concrete box girder bridges, sealing coating, non-uniform shrinkage, long-term structure behavior, control of shrinkage deformation

中图分类号:

U445.7

黄海东1，侯旭2. PC箱梁桥不均匀收缩控制技术研究[J]. 重庆交通大学学报（自然科学版）, 2019, 38(03): 1-8.

HUANG Haidong1, HOU Xu2. Control Technology of Non-uniform Shrinkage of PC Box-Girder Bridges[J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(03): 1-8.

参考文献

［1］谢峻, 王国亮, 郑晓华.大跨径预应力混凝土箱梁桥长期下挠问题的研究现状［J］. 公路交通科技. 2007,24 (1):47-50.
XIE Jun, WANG Guoliang, ZHENG Xiaohua. State of art of long-term deflection for long span prestressed concrete box-
girder
bridge ［J］. Journal of Highway and Transportation Research and Development, 2007, 24(1): 47-50.
［2］ WENDNER R, HUBLER M H, BAANT Z P. Optimization method, choice of form and uncertainty quantification of model
B4
using laboratory and multi-decade bridge databases ［J］. Materials and Structures, 2015, 48(4): 771-796.
［3］ WENDNER R, TONG T, STRAUSS A, et al. A case study on correlations of axial shortening and deflection with
concrete
creep asymptote in segmentally-erected prestressed box girders ［J］. Structure and Infrastructure Engineering, 2015,
11
(12): 1672-1687.
［4］ CHAI Y H. Service performance of long-span lightweight aggregate concrete box-girder bridges ［J］. Journal of
Performance of Constructed Facilities, 2016, 30(1): 04014196.
［5］ KRˇSTEK V, BAANT Z P, ZICH M, et al. Box girder bridge deflections ［J］. ACI Concrete International, 2006,
28
(1): 55-63.
［6］ TAKCS P F. Deformations in Concrete Cantilever Bridges Obervations
and Theoretical Modeling ［D］. Norway: The Norwegian University of Science and Technology, 2002.
［7］汪剑, 方志. 大跨预应力混凝土箱梁桥收缩徐变效应测试与分析［J］. 土木工程学报, 2008, 41(1):70-81.
WANG Jian, FANG Zhi. Analysis and field measurement of concrete box girder bridges for shrinkage and creep effects ［J
］.
China Civil Engineering Journal, 2008, 41(1): 70-81.
［8］黄海东, 向中富, 郑皆连. 混凝土结构早期非均匀收缩试验［J］. 中国公路学报, 2010, 23(3):64-69.
HUANG Haidong, XIANG Zhongfu, ZHENG Jielian. Test of non-uniform shrinkage in concrete structure at early ages ［J］.
China Journal of Highway and Transport，2010, 23(3): 64-69.
［9］黄海东, 向中富, 郑皆连. PC箱梁桥非均匀收缩变形分析［J］. 土木建筑与环境工程, 2009, 31(4):60-65.
HUANG Haidong, XIANG Zhongfu, ZHENG Jielian. Analysis of differential shrinkage deflection for PC box-girder bridges
［J］
. Journal of Civil, Architectural & Environmental Engineering, 2009, 31(4): 60-65.
［10］黄海东, 王承启. 变湿度环境下的混凝土结构桥梁长期干缩行为［J］. 中国公路学报, 2016, 29(8):77-84.
HUANG Haidong, WANG Chengqi. Long term drying shrinkage behavior of concrete bridges under cyclic humidity conditions
［J
］. China Journal of Highway and Transport，2016, 29 (8): 77-84.
［11］ LI H, LIU J, WANG Y, et al. Deformation and cracking modeling for early-age sidewall concrete based on the
multi-
field coupling mechanism ［J］. Construction and Building Materials, 2015, 88: 84-93.
［12］ KNOPPIK-WRBEL A, KLEMCZAK B. Degree of restraint concept in analysis of early-age stresses in concrete walls
［J
］. Engineering Structures, 2015, 102: 369-386.
［13］ JAFARIFAR N, PILAKOUTAS K, BENNETT T. Moisture transport and drying shrinkage properties of steel-fibre-
reinforced-concrete ［J］. Construction and Building Materials, 2014, 73: 41-50.
［14］张戎令,王起才,马丽,等.复配外加剂体系对高性能混凝土收缩性能的影响［J］.硅酸盐通报,2013,32 (11): 2194 -2199.
ZHANG Rongling, WANG Qicai, MA Li, et al. Compound admixture system effect on high performance concrete shrinkage
performance ［J］. Bulletin of the Chinese Ceramic Society, 2013, 32(11): 2194-2199.
［15］钱觉时,乔墩,石亮，等.减缩剂外涂对混凝土性能的影响及作用机理［J］.硅酸盐学报,2009,37(12):2090-2096.
QIAN Jueshi, QIAO Dun, SHI Liang, et al. Function and mechanism of shrinkage reducing agent coating concrete ［J］.
Journal of the Chinese Ceramic Society, 2009, 37(12): 2090-2096.
［16］ LEE Y, YI S T, KIM M S, et al. Evaluation of a basic creep model with respect to autogenous shrinkage ［J］.
Cement
and Concrete Research, 2006, 36(7): 1268-1278.
［17］ SARASWATHY V, SONG H W. Improving the durability of concrete by using inhibitors ［J］. Building and
Environment,
2007, 42(1): 464-472.

PC箱梁桥不均匀收缩控制技术研究

Control Technology of Non-uniform Shrinkage of PC Box-Girder Bridges

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

编辑推荐

Metrics