Archive: Fragility function fitting using maximum likelihood estimation

Note: this material has been superceded by comparable content at this link. The material below is provided purely for archival purposes.


by Jack Baker, 2011


Working paper that documents fragilty function fitting using maximum likelihood estimation. The tools provided below implement the mathematics explained in this document.


Available downloads

All of the following tools will produce the same results. They are simply provided to facilltate use of varying software packages.

Excel optimization tool. This Excel file fits fragility functions using the built-in solver function to find a maximum likelihood fit.

Matlab optimization tool. This Matlab script fits fragility functions using an optimization routine. This set of files also includes commands for fragility function calibration using the alternate sum of squared errors approach, to facilitate comparison of the results.

Matlab regression tool. This Matlab script fits fragility functions using Probit regression.




This work was supported by the NEHRP Consultants Joint Venture (a partnership of the Consortium of Universities for Research in Earthquake Engineering and Applied Technology Council), under Contract SB134107CQ0019, Earthquake Structural and Engineering Research, issued by the National Institute of Standards and Technology, for project ATC-82. Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the NEHRP Consultants Joint Venture.


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