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What are the control sections of frame beams and columns? What are the most unfavorable internal force combinations of each control section?
Let's start with the frame beam: the control section is 1, the midspan section is positive Mmax and Vmax, and the load-bearing section is negative Mmax and Vmax.
Frame column: the control section is 1, and the column bottom section is Mmax and its corresponding N, V, Nmax and its corresponding M, V, Vmax；; ;
2. Column top section: Mmax and corresponding n, v, Nmax and corresponding m, v, Vmax；; ;