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Development of Reliability-Based Load and Resistance Factor Design (LRFD) Methods for Piping

By
ASME Research Task Force on Development of Reliability-Based Load and Resistance Factor Design
ASME Research Task Force on Development of Reliability-Based Load and Resistance Factor Design
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ISBN-10:
0791802620
ISBN:
9780791802625
No. of Pages:
180
Publisher:
ASME Press
Publication date:
2007

This chapter analyzes the modeling uncertainty associated with prediction models used to obtain nominal values in the design of pipes compared to experimental results. The objective herein is to evaluate the bias, which is the ratio of the true (mean) value of a variable based on experimental results to its nominal value calculated according to a model. First the bias (Experimental Value ∕ Nominal Value) of models used for the prediction of the hoop stress and in consequence of the pipe's thickness is presented and then the bias in the prediction of pipes bending moments. This bias can be used...

6.1. Background
6.2. Hoop Stress
6.2.1. Lamé or Thick-Wall Theory
6.2.2. Thin-Wall Theory
6.2.2.1. The Barlow Formula
6.2.2.2. The Boardman Equation or Modified Lamé
6.2.3. Other Models
6.2.4. Experimental Results
6.2.5. Observations and Recommendations
6.3. Bending Moments
6.3.1. Pure Bending
6.3.2. Bending with Internal Pressure
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