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2009, Volume 3, Issue 1

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Frontiers of Structural and Civil Engineering >> 2009, Volume 3, Issue 1 doi: 10.1007/s11709-009-0006-5

Calculation of prestressed anchor segment by 3D infinite element

1. Bridge Science Research Institute, Major Bridge Engineering Bureau, Ministry of Railway, Wuhan 430034, China; 2. School of Civil Engineering and Mechanics, Huazhong University of Science & Technology, Wuhan 430074, China

Available online: 2009-03-05
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Abstract

Based on 1D infinite element theory, the coordinate transformation and shape function of 3D point-radiation 4-node infinite elements were derived. They were coupled with 8-node finite elements to compute the compressive deformation of the prestressed anchor segment. The results indicate that when the prestressed force acts on the anchor segment, the stresses and displacements in the rock around the anchor segment are concentrated in the zone center with the anchor axis and are subjected to exponential decay. Therefore, the stresses and the displacement spindles are formed. The calculation results of the infinite element are close to the theoretical results.

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