| 内埋CFRC材料的混凝土梁的应变主动调节 |
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| 引用本文： | 姚武,王瑞卿.内埋CFRC材料的混凝土梁的应变主动调节[J].同济大学学报(自然科学版),2007,35(3):377-380. |
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| 作者姓名： | 姚武 王瑞卿 |
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| 作者单位： | 同济大学,先进土木工程材料教育部重点实验室,上海,200092 |
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| 摘 要： | 利用碳纤维水泥基（CFRC）材料的电热效应，通过对埋置于普通混凝土梁中的CFRC材料通电加热后产生的热膨胀可以实现对混凝土梁应变或挠度变形的主动调节和控制．实验验证了这个方案的可行性．根据弹性力学推导的理论值与混凝土梁挠度变形实测值非常吻合．通过改变内埋CFRC材料的输入功率和通电时间可以控制CFRC材料的升温速率和终点温度，继而控制混凝土梁的变形速率和最大变形值．
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| 关 键 词： | 混凝土梁 碳纤维水泥基材料 电热效应 热膨胀 应变 主动调节 |
| 文章编号： | 0253-374X（2007）03-0377-04 |
| 修稿时间： | 2005-08-03 |
Active Strain Adjustment of Concrete Beam Embedded with Carbon Fiber-Reinforced Cement Material |
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| YAO Wu,WANG Ruiqing.Active Strain Adjustment of Concrete Beam Embedded with Carbon Fiber-Reinforced Cement Material[J].Journal of Tongji University(Natural Science),2007,35(3):377-380. |
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| Authors: | YAO Wu WANG Ruiqing |
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| Institution: | Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, Tongji University, Shanghai 200092, China |
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| Abstract: | Based on the Joule heating effect of carbon fiber-reinforced cement(CFRC) based materials,the strain or deflections of normal concrete beams can be actively adjusted and controlled by heating up the CFRC to thermal expansion,which is validated by an experimental study.The theoretical values of deformation of concrete beams calculated according to elastic mechanics agree well with the experimental data.By changing the input power and conduction time,the temperature increasing ratio and the terminal temperature of CFRC can be controlled.Therefore,the deformation ratio and the maximum deformation of concrete beam can also be controlled and adjusted. |
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| Keywords: | concrete beam carbon fiber-reinforced cement Joule heating effect thermal expansion strain active adjustment |
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