Study of prestressed anchor cable by damage 
softening detailed finite element model

ZHANG Xiong; CHEN Sheng-hong

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Study of prestressed anchor cable by damage softening detailed finite element model

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- Study of prestressed anchor cable by damage softening detailed finite element model
- Vol. 35, Issue 10, (2014)
- 作者机构：
  
  1. 中国水电工程顾问集团有限公司,北京,100120
  2. 武汉大学水资源与水电工程科学国家重点实验室,武汉,430072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU45
- Online First：27 October 2014，
  
  Published：2014
- 稿件说明：
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ZHANG Xiong, CHEN Sheng-hong. Study of prestressed anchor cable by damage softening detailed finite element model[J]. 2014, 35(10).
DOI：

ZHANG Xiong, CHEN Sheng-hong. Study of prestressed anchor cable by damage softening detailed finite element model[J]. 2014, 35(10). DOI：

摘要

预应力锚索作为岩土工程的一种主要加固技术已得到日益广泛的应用，但现有的计算方法难以反映岩体、砂浆、钢绞线相互之间的滑移变形等实际情况，计算结果难以体现实际的加固效果。通过研究接触面的特性引入损伤软化概念，建立了包含钢绞线、砂浆、接触面的损伤软化精细有限元模型，并与现场试验进行了对比分析。该模型优点是精细地描述了钢绞线、砂浆和接触面等结构的力学行为，可以反映接触面力学材料损伤软化的过程，更加精确地反映了锚固段的力学变化过程。试验结果对比显示，两者随着荷载不断加大，锚固段接触面上的剪应力峰值由端口往里转移。当端口处于弹性阶段，峰值在端口，呈指数衰减模式；当端口处出现损伤软化，峰值往里转移。计算分析反映的锚固段应力变化规律与试验基本一致。

Abstract

Prestressed anchor cable has been widely used as a main reinforcement measure in geotechnical engineering．But the existing calculation method is difficult to reflect the actual situation

such as slip deformation among rock

grout

steel stranded wires. Damage softening concept is introduced by studying characteristics of interface. Damage softening constitutive detailed finite element method is presented to simulate prestressed anchor

and a field test result is compared with calculation result. The most remarkable feature of the algorithm is that it can describe stranded wire

grout

interfaces and other detailed structures. It also can simulate the process of damage softening for interface. The new model can exactly reflect the mechanical change process of the anchoring segment. The test and simulation results are both show that with the load continuous increasing

the interface shear stress peak value of the anchoring segment transfers from the port to inside. The peak value appears at the port when the port is in elastic stage

and the peak value transfers from the port to inside when the port is in damage softening stage. The change law of stress for the anchoring segment of calculation results is basically in accordance with test.

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CHEN Sheng-hong

GE Xin-bo

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ZHAO Tong-bin

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MA Hong-ling

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Related Institution

China Renewable Energy Engineering Institute

College of Energy and Mining Engineering, Shandong University of Science and Technology

China Energy New Energy Storage Technology (Shandong) Co., Ltd.

State Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

School of Civil Engineering and Architecture, Zhejiang Sci-Tech University

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