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| 预应力锚索的预应力损失机理研究 | |
| 引用本文： | 周永江,何思明,杨雪莲. 预应力锚索的预应力损失机理研究[J]. 岩土力学, 2006, 27(8): 1353-1356 |
| 作者姓名： | 周永江 何思明 杨雪莲 |
| 作者单位： | 1. 四川省交通厅公路规划勘察设计研究院，成都 610000；2. 中国科学院成都山地灾害与环境研究所，成都 610041 |
| 摘 要： | 预应力锚索结构的预应力损失问题是造成锚索失效的关键问题。在具体分析影响预应力损失的各种因素的基础上，给出了各因素导致预应力损失的具体计算方法。特别对长期荷载下预应力损失机理进行了分析，其中钢绞线采用松弛模型；围岩体采用流变模型；灌浆材料采用蠕变模型进行预测。并给出了相应的理论计算公式，为预应力锚索设计、施工以及工后管理等提供了理论依据。 |
| 关 键 词： | 预应力损失 松弛 徐变 蠕变 |
| 文章编号： | 1000-7598-（2006）08-1353-04 |
| 收稿时间： | 2004-11-16 |
| 修稿时间： | 2005-03-02 |
Study on prestress loss of anchor cables under long-term loading |
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| ZHOU Yong-jiang,HE Si-ming,YANG Xue-lian. Study on prestress loss of anchor cables under long-term loading[J]. Rock and Soil Mechanics, 2006, 27(8): 1353-1356 | |
| Authors: | ZHOU Yong-jiang HE Si-ming YANG Xue-lian |
| Affiliation: | 1. Highway Planning Survey, Design and Research Institute, Sichuan Provincial Communications Department, Chengdu 610041, China; 2. Chengdu Research Institute of Environment and Disaster in Mountainous Regions, Chinese Academy of Sciences, Chengdu 610041, China |
| Abstract: | The pretress loss of anchor cable is the key cause induced the anchor structure failure; based on investigating all influencing factors, a method for calculating prestress loss is put forward; the influencing factors of prestress loss of anchor cable under long-term loading are analyzed; the relaxation model of steel strand, rheological model of rock as well as creep damage model of grouted material are put forward respectively; and using these theory to predict the prestress loss of anchor cable. There are the significant- sense to design and manage anchor cables. |
| Keywords: | prestress loss relaxation creep rheology |
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