CES合成構造平面架構の構造性能

抄録

A static loading test was carried out on a two-bay two-story concrete encased steel (CES) frame in which the beams and columns consisted of only steel and fiber reinforced concrete (FRC). In this test, the structural behavior of the frame such as the failure modes, hysteresis characteristics and deformation capacity was examined. Although the frame designed to be a weak beam-strong column system with the flexural yielding at the both ends of beams and the bottom of the first story columns, the shear yielding in the joint panel of the interior beam-column joints also occurred. The results showed that the use of FRC in the CES frame controlled the damage of the concrete. In addition, the frame had stable hysteresis loops with almost no degradation in load carrying capacity until the average story drift angle of 0.05 rad. Static inelastic analysis with reversal loading was also conducted to simulate the story shear versus story drift response of the frame. It is shown that the analytical results agree well with the test results in this paper.