Study On Simplified Calculation Method For Frame—Corewall—Outrigger Structure

By use of simplify analysis of building structure, it is essy to get the structure’s internal forces and deformation without building a complex computational model. Frame-corewall-outrigger structure as a new structural system. Few simplified model can be used at present, some model overlooks influence of corewall width and outrigger shearing deformation, there is big deviation for structural analysis.In the simplified calculation model, the corewall model as cantilever beam with the fixed bottom and free top, and the outrigger’s restriction effect to the corewall as a torsional spring. Considering the influence of the bend, shear deformation and the corewall width, then, the model is derived. Establishing lagrange equation for the structure, then deriving the hamilton dual system for the structure, the corewall’s internal force and deformation under the lateral load and the second-order effect are obtained by use of precise integration method. The model’s accuracy and feasibility are verified by a example in other paper.Study on outrigger optimizing, with the minimum vertex sway as the standard, outrigger’s position at 0.6H has the best effect. With the maximum outrigger constraint bending moment value as the objective function, outrigger’s position at 0.3H has the best effect. In the condition of outrigger’s position at 0.6H, set the outside frame column stiffness to be 0.1-0.2 times of the frame column stiffness, structure can get minimum vertex, maximum outrigger constraint bending moment, and minimum corewall constraint bending moment.This paper presents a new method for analysis of Frame-corewall-outrigger structure, it has logical calculation model, simple theoretical derivation, accurate numerical calculation, simple practical application etc. It can verify the validity and feasibility of this method by a actual example.