Stairs adopt slab stairs, which are all fire-fighting stairs. The foundation is an independent foundation, with columns under it, and high-strength PHC prestressed pipe piles.
Six horizontal axes of the frame are selected as the frame calculation unit, and the section size is estimated. The calculation thumb determines the lateral displacement nodes that can be ignored under the vertical load. The lateral displacement nodes that cannot be ignored under the horizontal load are calculated according to the rigid scheme and the elastic scheme. Recalculate the standard value of dead load, dead load and live load, draw the internal force diagram by using the torque of quadratic distribution, then calculate the wind load by using D value method, draw the internal force diagram and check whether it meets the displacement requirements, then calculate the representative load values of gravity at all levels, and calculate the internal force at the bottom under earthquake action by using shear force and draw the internal force diagram. Then, the internal forces of columns and beams are combined, and the safest results are selected to calculate the reinforcement quantity of beams, columns and foundations and check whether they are qualified or not, and check whether the beams and cracks on them are qualified or not. The stairs are recalculated, and the internal forces of platform beams and stairs are calculated and reinforced.
Key words: internal force combination of frame structure reinforcement of teaching building.