Reinforcement Design for Existing Non- conforming Steel Buildings Using STKR Columns

摘要

In the revision of the Building Standard Law of Japan in 2007, a new provision was added in which the column overdesign factor was set at 1.5 or more for steel buildings using cold-formed square steel tubes as the columns. This study targets existing steel buildings that cannot satisfy the above-mentioned factor and use the STKR-grade square steel tube as the columns.