LRFD Calibration of Metallic Reinforced Soil Walls
Publication: Foundation Engineering in the Face of Uncertainty: Honoring Fred H. Kulhawy
Abstract
The paper is focused on key points and lessons learned from LRFD calibration of simple limit state functions for the internal stability of metallic reinforced soil walls. The example used in the paper is the ultimate pullout limit state for ribbed steel strip reinforced mechanical stabilized earth (MSE) walls and a single load due to soil self-weight plus a permanent surcharge load. The paper demonstrates how load and resistance measurements from instrumented walls and physical pullout tests can be used to generate bias values. Bias statistics are then used to a) improve the accuracy of underlying deterministic models used to compute nominal load and resistance values, b) remove hidden dependencies, c) select load factors, and d) calculate resistance factors to meet an acceptable probability of failure. While the paper is focused on the pullout limit state example, the model fitting approach and LRFD calibration methodology is applicable to a wide range of other soil-structure limit state design problems in geotechnical engineering.
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Copyright
© 2013 American Society of Civil Engineers.
History
Published online: Mar 28, 2013
ASCE Technical Topics:
- Calibration
- Dead loads
- Design (by type)
- Engineering fundamentals
- Engineering mechanics
- Geomechanics
- Geotechnical engineering
- Limit states
- Load and resistance factor design
- Load factors
- Measurement (by type)
- Pullout behavior
- Soil dynamics
- Soil mechanics
- Soil stabilization
- Static loads
- Statics (mechanics)
- Structural design
- Structural engineering
- Structural members
- Structural systems
- Ultimate loads
- Uplifting behavior
- Walls
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