Abstract
Recently, the bolt hole tears were occurred at the longitudinal bolted lap joint of some soil steel structures made of corrugated steel plates. Various factors including attachments of the gasket and the washer, surface of the bolt hole, and bolt arrangements gave rise to discussion about how much each one could affect the bolt hole tears. The compression and bending tests are carried out the bolted lap joints to investigate the effect of gasket, washer, detect, and bolt arrangement. The tests showed that correct lap joint didn't show any bolt hole tearing with the considerable flexural ductility regardless of gasket and washer. In the incorrect lap joint, however, tearing of the corrugated plates always occurred shortly after the maximum moment was reached. Therefore, it is highly recommended that only correct joint lap be used. The use of gasket was considered acceptable showing only a little effect on the flexural behavior, but the washer was doubtful about its beneficial effect because it could give a reduced joint compressive strength when the relatively thick corrugated steel plates are used.