Hi,
I have modeled a 3D bridge with 3 bents. Section of bents is a 4*2 m rectangle which has a hollow of 3.2*1.2 correspondingly at the center. 1st period of this structure is about 0.9 sec. The problem is too low curvature of bents in order of 10-4 for max curvature during curvature. For bents sections I have used fiber section and for bent element, dispBeamColumn, 1 meter long and each has 10 integration points. I dont know why I have these too low curvatures. Why is that?
Low curvature
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