Three dimensional nonlinear finite element analysis of tieback walls and of soil nailed walls under piled bridge abutments /
A three-dimensional nonlinear finite element analysis is used to study the problem of tieback walls and of soil nailed walls constructed under a bridge abutment built on piles. In the simulation of the soil nailed wall under piled bridge abutment, the model treats the piles and nails as beam elemen...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1996.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=739669471&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | A three-dimensional nonlinear finite element analysis is used to study the problem of tieback walls and of soil nailed walls constructed under a bridge abutment built on piles. In the simulation of the soil nailed wall under piled bridge abutment, the model treats the piles and nails as beam elements, the shotcrete facing as shell elements, the abutment and pile cap as solid 3D brick elastic elements, and the soil as solid 3D brick nonlinear elements. To simulate the tieback wall, the model treats the soldier piles and the tendon bond length as beam elements, the wood lagging facing as shell elements, the tendon unbonded length as spring elements, and the soil as solid 3D brick nonlinear elements. The soil model used is a modified hyperbolic model with unloading hysteresis. The complete sequence of excavation of the embankment under the bridge and in front of the abutment and of the construction of the nails is simulated. The full construction sequence of tieback wall including sequential excavation in front of the wall and tieback installation and lock-off is simulated. The model is calibrated against an instrumented case history. Then a parametric study is conducted. The results of the soil nailing simulation under the piled bridge abutments give information on the effect of the excavation and nail placement on the following: axial load and bending moment in the piles, load in the nail, and deflections. The results of the tieback wall simulation provide information on the effect of the excavation and anchor placement on the following: wall deflections and axial load and bending moment in the soldier piles. The results are used to make design recommendations. |
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| Item Description: | Vita. "Major Subject: Civil Engineering". |
| Physical Description: | xvi, 324 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages 316-323. |