预应力混凝土连续梁桥施工过程中徐变效应分析

周雁玲; 曹大富; 王琨; 葛文杰; 刘嘉琪

doi:10.13204/j.gyjzg21060914

预应力混凝土连续梁桥施工过程中徐变效应分析

doi: 10.13204/j.gyjzg21060914

1. 扬州大学建筑科学与工程学院, 江苏扬州 225127;
2. 江苏邗建集团有限公司, 江苏扬州 225127

基金项目:

2019年江苏省“双创计划”资助项目

国家自然科学基金项目(51878589,51578478)

2016年扬州大学优秀青年骨干教师资助项目

扬州市科技局科技计划资助项目(YZ2018068)

2019年扬州市“绿杨金凤”资助项目

江苏省人力资源和社会保障厅“六大人才高峰”资助项目(2017-JZ-038)

详细信息

作者简介:
周雁玲,女,1997年出生,硕士研究生

通讯作者:
王琨,wangkun@yzu.edu.cn。

计量
- 文章访问数: 100
- HTML全文浏览量: 21
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2021-06-09
- 网络出版日期: 2023-02-06

Analysis of Creep Effect of Prestressed Concrete Continuous Beam Bridge in Construction Process

1. College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China;
2. Jiangsu Hanjian Group Co., Ltd., Yangzhou 225127, China

摘要

摘要: 为了研究预应力混凝土连续梁桥在采用悬臂施工方法进行施工过程中的徐变效应,对海安新通扬大运河施工过程进行了监控。推出任意时刻桥梁徐变效应的近似计算公式,提出影响系数概念,并线性回归出徐变系数公式。研究表明,回归获得的单一加载龄期徐变系数,可以利用老化理论扩展到任意加载龄期,且与我国现行桥梁规范和美国规范相比,其计算所得结果与实测结果仅存在15%范围内的误差,吻合度好,而我国现行桥梁规范和美国规范计算所得结果应变偏差均超过15%,挠度偏差均整体偏大,因而得到的计算方式具有良好的计算精度。
- 预应力 /
- 混凝土 /
- 连续梁桥 /
- 施工过程 /
- 徐变效应
Abstract: In order to study the creep effect of prestressed concrete continuous beam bridge in the construction process based on cantilever construction method, the construction process of Hai’an Xintongyang Grand Canal was monitored. The approximate calculation formula of bridge creep effect at any time was deduced. The concept of influence coefficient was proposed. The creep coefficient formula was obtained by linear regression. The results showed that the creep coefficient of single loading age obtained by regression could be extended to any loading age by aging theory. Compared with the current bridge codes in China and America, the calculated results and the measured results only had errors within 15 percent of the range, and the agreement was good. However, the strain deviation calculated by the current bridge code in China and the American code was more than 15%, and the deflection deviation was larger on the whole. Therefore, the calculation method obtained in this paper showed a good accuracy.
- prestress /
- concrete /
- continuous beam bridge /
- construction process /
- creep effect

HTML全文

参考文献(16)

[1]	李宁.基于有限元的预应力混凝土桥梁徐变效应研究[J].公路工程, 2017, 42(3):58-63.
[2]	李建慧, 李爱群.混凝土结构收缩徐变效应随机分析[J].工业建筑, 2016, 46(9):76-80 , 55.
[3]	王志民.预应力混凝土徐变问题对大跨度连续梁结构影响的研究与实践[D].天津:天津大学, 2004.
[4]	胡狄, 陈政清.预应力混凝土桥梁收缩与徐变变形试验研究[J].土木工程学报, 2003(8):79-85.
[5]	杜学冬.预应力混凝土连续梁桥施工过程中的徐变效应分析[D].扬州:扬州大学, 2009.
[6]	李文江.大跨度预应力混凝土连续梁桥施工控制[D].大连:大连理工大学, 2013.
[7]	TADROS M K, AL-OMAISHI N, SEGUIRANT S J, et al.Prestress losses in pretensioned high-strength concrete bridge girders[R].Washington:Transportation Research Board, 2003.
[8]	陈永春.混凝土徐变问题的中值系数法[J].建筑科学, 1991, 7(2):3-8.
[9]	宋闯.大跨连续刚构桥收缩徐变效应与计算方法研究[D].西安:长安大学, 2018.
[10]	CHUL H S.Advanced environmental monitoring and modeling (AEMM) 2014[J].Chemosphere, 2016, 143:1-2.
[11]	BROOKS J J, NEVILLE A M.Relaxation of stress in concrete and its relation to creep[J].Material Science, 1976, 73(4):227-232.
[12]	MOKHTAR A-SA, GHALI A.Computer analysis and design of concrete beams and grids[J].Journal of Structural Engineering, 1988, 114(12):2669-2691.
[13]	胡狄.预应力混凝土桥梁时变效应分析的钢筋约束影响系数法[J].工程力学, 2006(6):120-126.
[14]	袁鹏飞.高强混凝土箱梁桥收缩徐变效应分析[D].重庆:重庆大学, 2013.
[15]	中华人民共和国交通运输部.公路钢筋混凝土及预应力混凝土桥涵设计规范:JTG 3362-2018[S].北京:人民交通出版社, 2018.
[16]	American Concrete Institute.Building code requirements for structural concrete (ACI 318-11) and commentary:ACI 318 ERTA-2012[S].Farmington Hills:American Concrete Institute, 2012.