4.6 Article

Genetic algorithm-based ground motion selection method matching target distribution of generalized conditional intensity measures

Journal

EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
Volume 50, Issue 6, Pages 1497-1516

Publisher

WILEY
DOI: 10.1002/eqe.3408

Keywords

fitness function; generalized conditional intensity measures; genetic algorithm; ground motion selection

Funding

  1. Science Foundation of the Institute of Engineering Mechanics, CEA [2020C01, 2019B09]
  2. Chinese National Natural Science Fund [51908518, 51778589]
  3. Heilongjiang Provincial Natural Science Foundation of China [LH2020E022]

Ask authors/readers for more resources

This study developed an approach for selecting sets of ground motion recordings that match a target conditional multivariate distribution of ground motion intensity measures using a genetic algorithm. The proposed GA method efficiently searches and finds a desired number of recordings to represent the target conditional IMs' distribution, demonstrating that it is promising for searching pairs of recordings that could simultaneously match the target conditional distribution of various IMs.
This study developed an approach for selecting sets of ground motion recordings that match a target conditional multivariate distribution of ground motion intensity measures (IMs). This was achieved by applying a genetic algorithm (GA) that treats IMs of interest of each recording as a chromosome and the set of the desired number of recordings as a single individual. The fitness function was constructed by measuring the mismatch between the target and the individual's means and variances for all IMs. Then, through Roulette wheel natural parent selection, one-point chromosome crossover, and individual mutation, new generations of ground motion sets were produced and the process was continued until the optimum combination of recordings was obtained. Example application illustrated that the proposed GA method could efficiently search and find a desired number of recordings to represent the target conditional IMs' distribution, including the mean and variance. The IMs considered included response spectrum (range: 0.05-10.0 s), amplitude/intensity-based IMs, cumulative-based IMs, and duration. Comparison with existing GCIM selection method indicated that the standard deviation of the recordings selected using the proposed GA method was closer to the target and more stable among replications. The results demonstrated that the proposed GA method represents a promising approach for searching pairs of recordings that could simultaneously match the target conditional distribution of various IMs.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available