Updating uncertainties in friction angles of clean sands

25-Apr-2016 16:32 by 2 Comments

Updating uncertainties in friction angles of clean sands - Naughtychat xxx

Response surfaces obtained from finite element analyses are adopted to efficiently evaluate the wall responses.Deflection data for 49 wall sections from 11 case histories are collected to characterize the model error of the finite element method for evaluating the deflections at various points.

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The results indicate that the soil parameters could be updated more significantly for the updating that uses the deflection data at multiple points than that only uses the maximum deflection data.

MYRG081(Y1-L2)-FST13-YKV and the Science and Technology Development Fund of the Macau SAR government under Grant No.

It is essential to characterize the uncertainties of soil shear strengths, including friction angles of sands.

A database of strong ground motion records in the Tangshan region of China is obtained from the China Earthquake Data Center for the analysis.

The optimal predictive formula is proposed based on this database.

Test databases are used to demonstrate the consistency of the proposed simplified equations.

ABSTRACT: This paper presents an efficient Bayesian back-analysis procedure for braced excavations using wall deflection data at multiple points.

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Peak ground acceleration (PGA) estimation is an important task in earthquake engineering practice.

One of the most well-known models is the Boore-Joyner-Fumal formula, which estimates the PGA using the moment magnitude, the site-to-fault distance and the site foundation properties.

In the present study, the complexity for this formula and the homogeneity assumption for the prediction-error variance are investigated and an efficiency-robustness balanced formula is proposed.

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