The figure below shows the failure at the collector beam flange of a welded brace to collector beam in an eccentrically braced  frame in the February 22, 2011 Christchurch earthquake. Choose all the statements about this failure which are correct多项选择题

The failure shows that the collector beam material was brittle at the time of the earthquake

This failure occurred when the brace was in tension due to earthquake loading

If the brace flange below the beam flange had lined up with the stiffener above the beam flange and the welds had been sufficiently strong, this failure would not have occurred

Because the brace flange was wider than the collector beam flange, this failure would have occurred even if the brace flange below had lined up with the stiffener above

The failure was a ductile tearing failure in the beam web due to overloading