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Structural Engineering and Mechanics Volume 6, Number 3, April 1998 , pages 259-274 DOI: https://doi.org/10.12989/sem.1998.6.3.259 |
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Finite element modeling of a deteriorated RC slab bridge: lessons learned and recommendations |
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Ho IK, Shahrooz BM
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| Abstract | ||
| The test results from non-destructive and destructive field testing of a three-span deteriorated reinforced concrete slab bridge are used as a vehicle to examine the reliability of available tools for finite-element analysis of in-situ structures. Issues related to geometric modeling of members and connections, material models, and failure criteria are discussed. The results indicate that current material models and failure criteria are adequate, although lack of inelastic out-of-plane shear response in most nonlinear shell elements is a major shortcoming that needs to be resolved. With proper geometric modeling, it is possible to adequately correlate the measured global, regional, and local responses at all limit states. However, modeling of less understood mechanisms, such as slab-abutment connections, may need to be finalized through a system identification technique. In absence of the experimental data necessary for this purpose, upper and lower bounds of only global responses can be computed reliably. The studies reaffirm that success of finite-element models has to be assessed collectively with reference to all responses and not just a few global measurements. | ||
| Key Words | ||
| abutment, actual structures, analytical modeling, bridge, correlation study, destructive testing, deteriorated bridges, field testing, finite element analysis, geometric modeling, linear analysis, non-destructuctive testing, nonlinear analysis, piper cap, reinforced concrete slab bridge, slab-abutment connection, slab-pier cap connection, system identification, truck load testing | ||
| Address | ||
| Ho IK, CICI Corp, Taipei, Taiwan CICI Corp, Taipei, Taiwan Univ Cincinnati, Dept Civil & Environm Engn, Cincinnati, OH 45221 USA | ||