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| 混凝土振弦式应变计测试技术研究 | |
| 引用本文： | 陈常松,颜东煌,陈政清,涂光亚,田仲初.混凝土振弦式应变计测试技术研究[J].中国公路学报,2004,17(1):29-33. |
| 作者姓名： | 陈常松 颜东煌 陈政清 涂光亚 田仲初 |
| 作者单位： | 1. 中南大学,土木建筑学院,湖南,长沙,410075;长沙理工大学,桥梁与结构工程学院,湖南,长沙,410076 2. 长沙理工大学,桥梁与结构工程学院,湖南,长沙,410076 3. 中南大学,土木建筑学院,湖南,长沙,410075 |
| 基金项目： | 国家自然科学基金重大项目(59895410)，交通部“九五”重点科技攻关项目(95-04-05-38) |
| 摘 要： | 基于振弦式混凝土应变计的测试原理,在现场试验的基础上,对桥梁工程中应变测试的温度变化影响作了深入的探讨,分析了振弦式应变计的自由应变的温度影响以及约束温度应变的计算方法;提出了针对振弦式应变计的温度影响修正公式;同时对水化热影响的消除办法进行了分析探讨;提出了用测试应变反映混凝土应力的处理方法,并以荆州长江公路大桥为例介绍了这种消除办法和处理方法的应用效果。 |
| 关 键 词： | 桥梁工程 振弦式应变计 现场试验 混凝土应变 温度影响修正 水化热 应力阈值 |
| 文章编号： | 1001-7372(2004)01-0029-05 |
| 修稿时间： | 2003年2月11日 |
Technique research of vibrational chord strain gauge to concrete |
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| CHEN Chang-song,YAN Dong-huang,CHEN Zheng-qing,TU Guang-ya,TIAN Zhong-chu.Technique research of vibrational chord strain gauge to concrete[J].China Journal of Highway and Transport,2004,17(1):29-33. | |
| Authors: | CHEN Chang-song YAN Dong-huang CHEN Zheng-qing TU Guang-ya TIAN Zhong-chu |
| Abstract: | Based on the principle of vibrational chord strain gauge to concrete, the temperature effect to concrete strain gauge is discussed in depth with the test on the building site. The free strain and restricted strain are analysed firstly. A method is developed to correct the temperature effect in the means of formula. The elimination measurement with regard to effect of concrete hydrate heat is also analyzed. The means which is to reveal the stress level according to strain value is presented. All those methods have been verified by the example of Jingzhou Yangtze River Bridge. |
| Keywords: | bridge engineering vibrational chord strain gauge site test concrete strain correction of temperature effect hydrate heat stress threshold |
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