Safety verification of steel open type Sabo dams against large scale debris flow

Abstract

There have been recent damaged examples of steel open type Sabo dams against large scale debris flow. This was caused due to large rocks carried in the debris flow resulted from torrential rainfall of abnormal weather. This paper presents a safety verification method of steel open type Sabo dams against large scale debris flow (hereafter, called as load level II). First, the load level II should be considered from the topographical point of view at the dam construction point. Then, the load level II is determined by examining the field survey or past large debris flow disasters. Second, a safety verification method of steel open type Sabo dams is proposed against the load level II form the viewpoint of performance-based design. Finally, a safety verification of steel open type Sabo dams is numerically illustrated against fluid force and large rock impact corresponding to the load level II by using a software of ANSYS AUTODYN.