| Title |
Vulnerability Curve Assessment of Low/Mid-Rise Buildings Subjected to Debris-Flow Hazards |
| Authors |
최승훈(Choi, Seung Hun) ; 함희정(Ham, Hee Jung) ; 이승수(Lee, Sungsu) |
| DOI |
https://doi.org/10.5659/JAIK.2021.37.11.281 |
| Keywords |
Debris-Flow; Structural System; Building; Vulnerability Curve; FOSM; Log-Normal Cumulative Distribution Function |
| Abstract |
In this study, a methodology is developed to evaluate vulnerability (mean damage probability) curves of debris-flow for low/mid-rise buildings
based on the fragility (exceedance damage probability) curves and mean damage ratio (MDR). In order to evaluate fragility curves, First
Order Second Moment (FOSM) method is applied in this study. In the FOSM method, the maximum horizontal displacement of the building
caused by the static and dynamic loadings of debris-flow is estimated as the effect of the external force, and the median/log-standard
deviation values of spectral displacement of earthquake fragility of buildings developed by National Emergency Management Agency (NEMA)
are used as the resistance statistics. MDR of the building subjected to the load of debris-flow is established based on literatures of the post
investigations of debris-flow and landslide disasters, and is applied to convert the fragility curve to vunerability curve. 32 different types of
vulnerability curves for buildings are databased as the variables of log-normal cumulative distribution function (CDF) after calibration and
correction with the available post-disaster data sets. The vulnerability curves developed in this study may be used for risk and loss
assessment of buildings subjected to debris-flow hazards. The developed methodology can be also applied if information of the fragility is
available and the vulnerability has to be estimated from the fragility. |