VULNERABILITY INDEX ASSESSMENT USING NEURAL NETWORKS (VIANN): A CASE STUDY OF NICOSIA, CYPRUS

Dindar H., Dimililer K., ÖZDAĞ Ö. C., Atalar C., Akgun M., Ozyanki A.

4th International Workshop on Geoinformation Science / 4th ISPRS International Workshop on Multi-Dimensional and Multi-Scale Spatial Data Modeling (GeoAdvances), Safranbolu, Türkiye, 14 - 15 Ekim 2017, ss.189-195 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası:
  • Doi Numarası: 10.5194/isprs-annals-iv-4-w4-189-2017
  • Basıldığı Şehir: Safranbolu
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.189-195
  • Anahtar Kelimeler: Vulnerability Index, Microtremor, Back Propagation Neural Networks, Sensitivity Zones, Nakamura Method, MICROTREMOR MEASUREMENTS, HVSR, SOIL, CITY
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Many scholars have used microtremor applications to evaluate the vulnerability index. In order to reach fast and reliable results, microtremor measurement is preferred as it is a cost-effective method. In this paper, the vulnerability index will be reviewed by utilization of microtremor measurement results in Nicosia city. 100 measurement stations have been used to collect microtremor data and the data were analysed by using Nakamura's method. The value of vulnerability index (K-g) has been evaluated by using the fundamental frequency and amplification factor. The results obtained by the artificial neural network (ANN) will be compared with microtremor measurements. Vulnerability Index Assessment using Neural Networks (VIANN) is a backpropagation neural network, which uses the original input microtremor Horizontal Vertical Spectrum Ratio (HVSR) spectrum set. A 3-layer back propagation neural network which contains 4096 input, 28 hidden and 3 output neurons are used in this suggested system. The output neurons are classified according to acceleration sensitivity zone, velocity zones, or displacement zones. The sites are classified by their vulnerability index values using binary coding: [1 0 0] for the acceleration sensitive zone, [0 1 0] for the velocity sensitive zone, and [0 0 1] for the displacement sensitive zone.