| 预应力混凝土梁实际刚度的测试及分析 |
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| 引用本文： | 赵冲久,王小明,徐满意. 预应力混凝土梁实际刚度的测试及分析[J]. 水道港口, 2007, 28(1): 44-47 |
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| 作者姓名： | 赵冲久 王小明 徐满意 |
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| 作者单位： | 交通部天津水运工程科学研究所水工构造物检测、诊断与加固技术实验室,天津,300456;哈尔滨工程大学,哈尔滨,150001;哈尔滨工程大学,哈尔滨,150001;交通部天津水运工程科学研究所水工构造物检测、诊断与加固技术实验室,天津,300456;交通部天津水运工程科学研究所水工构造物检测、诊断与加固技术实验室,天津,300456 |
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| 基金项目： | 交通部天津水运工程科研所技术开发基金 |
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| 摘 要： | 用挠度法计算预应力梁的残余预应力时,预应力梁的实际刚度是一个难以确定的参数,要测试刚度就必须借助于可直接测量的挠度来推算。测试的结果表明预应力梁的实际刚度总是小于规范中的计算刚度。依据这种试验方法,可以测试在役的预应力混凝土梁的当前实际刚度,这就为计算在役梁的残余预应力提供了可能。
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| 关 键 词： | 实际刚度 反拱度 残余预应力 |
| 文章编号： | 1005-8443(2007)01-0044-04 |
| 修稿时间： | 2006-11-28 |
Test and analysis of practical stiffness of prestressed concrete beam |
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| ZHAO Chong-jiu,WANG Xiao-ming,XU Man-yi. Test and analysis of practical stiffness of prestressed concrete beam[J]. Journal of Waterway and Harbour, 2007, 28(1): 44-47 |
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| Authors: | ZHAO Chong-jiu WANG Xiao-ming XU Man-yi |
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| Abstract: | Practical stiffness of prestressed beam has been a difficulty parameter to determine in calculating residual prestressing of the beam by deflection method.The deflection of measurment directly is needed to test stiffness.The result shows that the practical stiffness of prestressed beam is always less than the calculated stiffness in the standard.According to this method,the present stiffness of the prestressed beam which is being used can be tested.Therefore,it is possible to calculate the residual prestressing of the using beam. |
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| Keywords: | practical stiffness camber residual prestressing |
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