Hamiltonian Dual System For Simplified Analysis Of Multi-outrigger Frame Core-tube Structures

In practical engineering applications,the setting of outrigger components can coordinate the structural deformation.Making the structural force more uniform,and effectively reduce the structural deformation of out-of-limit buildings.But there are many problems in the setting of outrigger components.Therefore,it is of great practical significance to study the internal force characteristics and deformation characteristics of this type of structural system under external loads.This paper intends to establish a simplified computational mechanics model of the core tube structure of the multi-outrigger frame.Consider the rigidity of the core tube and the outrigger and the tensile and compression rigidity of the frame column.Simplify the core tube into a Timoshenko cantilever beam with a fixed bottom end and a free top end.The outrigger reinforcement layer is regarded as an elastic constraint acting on the core tube.And based on the establishment of a simplified computational mechanics model,the stiffness matrix of the constraint of the outrigger on the core tube is derived.Establish a Hamiltonian solution system for the mechanical analysis of the core tube structure of the multi-reach frame.Precise integration algorithm with the introduction of zone mixed energy matrix.Using the idea of displacement-based finite element method.Integrate the element stiffness matrix obtained from the section mixing energy into the overall stiffness matrix.And insert the relationship matrix between the constraint bending moment and the rotation angle of the boom into the overall stiffness matrix.Compile a computer program.By numerical calculation.Establish a numerical solution for the lateral displacement and internal force of the core tube structure of the multi-extendable frame.Taking structural apex displacement and cylinder bottom bending moment as control targets.Perform collaborative analysis of the core tube of the multi-reach frame and the second-order analysis considering the influence of its own weight.And a comparative analysis of the core tube structure of the multi-reach frame.The result shows.Based on the method in this paper,the calculated values of lateral displacement and internal force of the multi-extend frame core tube structure system are basically consistent with the existing calculation results in the literature.Verify the rationality and accuracy of the method in this article.Using the idea of displacement-based finite element method to integrate the element stiffness matrix obtained from the mixed energy of the section into the overall stiffness matrix.Through the comparative analysis of outrigger design schemes.Investigate the influence of the number and position of the outriggers on the bottom bending moment and top side shift of the structure.The result shows.The setting position of the outrigger should be evenly arranged along the height of the structure.When the number of outriggers is between 4 and 6.The best outreach effect.The calculation method proposed in this article is of great significance to the structure and analysis of the core tube of the multi-extend frame frame...