Abstract
Fire resistance tests were conducted for the developed braces restrained and protected by a pair of steel channels filled with mortal, namely, steel mortal planks. Four isolated braces, which were subjected to an axial compressive load simulating long-term-load effects, were tested as specimens during fire. A set of round steel bars was provided along with both edges of core brace member so that the position of the steel channels was fixed in the standard type of specimens. Measured steel temperature histories of specimens show that filling thicker mortal, instead of round steel bars, as well as further protection covering steel channels is effective at developing higher fire-resistant performance. A static loading test in the normal temperature was also carried out for one of the standard type of specimens. The test results are compared with those of buckling-restrained braces in previous papers.
