Before revision: Most investigations on the earthquake rotational loading, by considering the effects of point rotation on the behavior of structures have shown that the rotational components based on their frequency content can severely change dynamic behavior of structures, which are sensitive to high-frequency motions, such as secondary systems, historical monuments, nuclear reactors, tall asymmetric buildings or irregular frames, slender tower shape structures, bridges, vertically irregular structures, and even ordinary multi-story buildings.M.
After revision: Most investigations on the earthquake rotational loading, by considering the effect of point rotation on the behavior of structures have shown that the rotational components based on their frequency content can severely change dynamic behavior of structures, which are sensitive to high-frequency motions, such as secondary systems, historical monuments, nuclear reactors, tall asymmetric buildings or irregular frames, slender tower shape structures, bridges, vertically irregular structures, and even ordinary multi-story buildings.M.