The method of strengthening the structure is adopted to change the load distribution, the way of force transmission, the nature of the node and the boundary conditions, the addition of additional members and supports, the application of prestress, and the consideration of space coordination. The general method of changing the structure calculation graph is:
(1) Increase the support to form a space structure and check the calculation according to the space structure, add support to increase the structural rigidity or adjust the natural vibration frequency of the structure, etc., to increase the structural bearing capacity and improve the dynamic characteristics of the structure;
(2) Add support or auxiliary rods to reduce the slenderness ratio of the structure to improve its stability;
(3) In the bent frame structure, focus on strengthening the rigidity of a column to make it bear most of the horizontal force to reduce the load of other columns.
Additional fulcrum reinforcement method
After the beams and slabs are added with fulcrums in the middle of the span, the span is reduced, which can greatly increase the bearing capacity, and can reduce and limit the deflection and deformation of the beams and slabs. It is suitable for the reinforcement of horizontal structures such as beams, slabs, trusses, and grids in large-span structures with unrestricted house clearance. The advantage is that it is simple and reliable, but the disadvantage is that the use space will be affected to a certain extent.