预应力混凝土收缩徐变效应测试与分析

熊学玉; 黄炜一; 张亚东; 王国民

doi:10.13204/j.gyjz201204014

预应力混凝土收缩徐变效应测试与分析

doi: 10.13204/j.gyjz201204014

1.
1. 同济大学建筑工程系上海 200092;
2.
2. 同济大学先进土木工程材料教育部重点实验室上海 200092;
3.
3. 广西华蓝设计(集团)有限公司南宁 530011;
4.
4. 中国建筑设计研究院北京 100044;
5.
5. 上海铁路局苏州站改造工程建设指挥部江苏苏州 215031

基金项目:

国家行业标准《预应力混凝土结构设计规范》研究项目;上海市科委科技支撑计划(09231201102);国家自然科学基金资助项目(51178328);上海市科委《现代预应力成套技术》(0907H194200);教育部高等学校博士学科点专项科研基金(20090072110051);铁道部重点课题(2010G009-K);科技部创新项目(10C26213100691);上海市科技启明星项目(11QB1405500)

详细信息

作者简介:
熊学玉，男，1962年出生，博士，教授，博士生导师。

中图分类号: TU528
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出版历程
- 收稿日期: 2011-07-29
- 刊出日期: 2012-04-20

FIELD MEASUREMENT AND ANALYSIS OF PRESTRESSED CONCRETE FOR SHRINKAGE AND CREEP EFFECTS

1.
1. Department of Building Engineering,Tongji University,Shanghai 200092,China;
2.
2. Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education,Tongji University,Shanghai 200092,China;
3.
3. Guangxi Hualan Design &Consulting Group,Nanning 530011,China;
4.
4. China Architecture Design &Research Group,Beijing 100044,China;
5.
5. Shanghai Railway Bureau Suzhou Station Improvement Project Construction Headquarter,Suzhou 215031,China

摘要

摘要: 对某预应力梁在混凝土收缩徐变效应作用下的真实反应进行测试并分析实测数据。分析结果表明,虽然有一定的起伏出现,混凝土应变与以往收缩徐变资料是一致的,按201 d的混凝土应变总量来看,前100多天内混凝土应变值占到的比例接近75%。通过与JTG D622004《公路钢筋混凝土及预应力混凝土桥涵设计规范》、ACI 209R-1992、中国建科院(1986)三个预测模型的对比,实测值前期接近于ACI 209R-1992模型,后期变化接近JTG D622004规范模型,实测修正值预测模型与两规范模型吻合较好。
- 预应力混凝土 /
- 收缩徐变 /
- 预测模型
Abstract: In this paper,the true response of a prestressed conrete beam for shrinkage and creep effects have been tested. The results of data analysis illustrate that the strain of concrete consistent with the previous data of shrinkage and creep. As compared to the total strain of 201 d,the proportion of concrete strain in 100 d was close to 75%. As compared to the predicting models of JTG D622004 code,ACI 209R-1992 and China Academy of Building Research(1986), the early test results approximated to the model of ACI 209R-1992,whose changes in late period approximated to the model of JTG D622004 code. Revised test results coincided to those of the predicting models.
- prestressed concrete /
- shrinkage and creep /
- predicting model