大跨度混凝土桥梁预应力摩擦损失的理论研究*

刘鹏飞; 赵启林; 江克斌; 高和生

doi:10.13204/j.gyjz201110016

大跨度混凝土桥梁预应力摩擦损失的理论研究*

doi: 10.13204/j.gyjz201110016

1.
1. 解放军理工大学工程兵工程学院,南京 210007;
2.
2. 7188部队,山东烟台 265801

基金项目:

江苏省自然科学基金资助项目(BK209467)

详细信息

作者简介:
刘鹏飞，男，1984年出生，博士研究生。E－mail:286423515@qq.com

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- 文章访问数: 68
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- 被引次数: 0
出版历程
- 收稿日期: 2010-11-08
- 刊出日期: 2011-10-20

THEORETIC RESEARCH ON FRICTION LOSS OF PRE-STRESS IN LARGE-SPAN CONCRETE BRIDGE

1.
1. Engineering Institute of Corps of Engineering,PLA Univ．of Sci. ＆ Tech. ,Nanjing 210007,China;
2.
2. 71887 Troops of PLA,Yantai 265801,China)

摘要

摘要: 许多大跨度桥梁在预应力张拉过程中发现结构实际效应难以达到理论预期效果。通过对大量桥梁摩擦损失的实测结果的统计分析，指出摩擦损失过大可能是导致以上现象发生的主要原因。随后从现有的摩擦损失计算模型出发，通过理论与实测数据的分析，指出：现有摩擦损失与索长的非线性关系、计算中忽略平弯角以及应力状态影响等是导致长索摩擦损失理论值经常小于实测值的主要原因。最后，提出了摩擦损失计算的改进建议。
- 大跨度 /
- 桥梁 /
- 预应力 /
- 摩擦损失 /
- 理论研究
Abstract: It has been found that the actual pre-stress effect is hard to reach its expected theoretic value during thetension process in many large-span bridges. It can be explained in a large part by the excess friction loss of pre-stressby the statistical analysis of the measured results of the friction loss of numerous bridges． Based on current calculationmodel for friction loss, the analysis of the theoretic value and the measured results shows that the non-linearrelationship between friction loss and cable length, the ignorance of plane-bending angle in calculation and the effectof stress state are the main reasons for the smaller theoretic value regularly as compared with the measured results．Finally some suggestions are made to improve the calculation of friction loss．
- large-span /
- bridge /
- pre-stress /
- friction loss /
- theoretic research