| A Combined-Power Model for the Distribution of Axial Force in Shaft Anchor along Its Length |
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| 作者姓名： | 卫军 周锡武 朱玉 罗昕 |
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| 作者单位： | Civil Engineering Department Huazhong University of Science and Technology Wuhan430074 China，Civil Engineering Department Huazhong University of Science and Technology Wuhan430074 China，Civil Engineering Department Huazhong University of Science and Technology Wuhan430074 China，China Communications Second Highway Survey Design and Research Institute Wuhan430052 China，Civil Engineering Department Huazhong University of Science and Technology Wuhan430074 China |
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| 基金项目： | This paper is supported by the Foundation for Research Project of ChinaCommunications Second Highway Survey Design and ResearchInstitute . |
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| 摘 要： | INTRODUCTIONThe anchorage of geomaterial , including shaftanchors and prestressed tendons ,is usually used ingeotechnical engineering. Owing to various advanta-ges ,these two anchorage types are widely used instructures in China ( Cao et al ., 2003 ; Fu et al .,1999 ;Lu et al .,1998 ; Li et al .,1995) . Shaft an-chors can be classifiedinto three kinds by the forceinthe shaft and cement grout :tensile ,press ,and sheartype (Lu et al .,1998) . The tensile type is the mostpopular in China…
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| 关 键 词： | 竖井 锚 轴力 预应力 地质工程 |
| 收稿时间： | 2005-09-22 |
| 修稿时间： | 2005-12-30 |
A Combined-Power Model for the Distribution of Axial Force in Shaft Anchor along Its Length |
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| Wei Jun,Zhou Xiwu,Zhu Yu,Luo Xin.A Combined-Power Model for the Distribution of Axial Force in Shaft Anchor along Its Length[J].Journal of China University of Geosciences,2006,17(1):89-94. |
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| Authors: | Wei Jun Zhou Xiwu Zhu Yu Luo Xin |
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| Institution: | 1. Civil Engineering Department, Huazhong University of Science and Technology, Wuhan 430074, China;2. Civil Engineering Department, Huazhong University of Science and Technology, Wuhan 430074, China; China Communications Second Highway Survey Design and Research Institute, Wuhan 430052, China;3. Civil Engineering Department, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | The theoretical results of axial force distribution models differ greatly from tests because of the complication of the rock type material. A three-parameter combined-power model is proposed by curves fitting the test data recorded from the pull tests on anchoring bars used in different engineering projects. Based on the comparison of the mechanical characteristics of shaft anchors and prestressed tendons, a two-parameter combined-power function model for prestressed tendons is proposed. The bounded length derived from the model and the suggested values of the parameters are also proposed. Compared with the Gaussian model, the three-parameter combined-power model is more precise and simple in expression. Results also suggest that the bounded length calculated from the average stress method is not safe enough. |
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| Keywords: | axial force prestress tendon bounded length combined-power model Gaussian model |
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