The Analysis Of Bundled-tube Structures Under Bending And Torsion Moments By Precise Integration Method

Structurally, beam tube structure of the lateral stiffness, strong carrying capacity,and have good ductility and seismic performance; Look from the building, bundle tubestructure can provide larger use of space, make the building layout flexibility. It is theseadvantages, beam tube structural system is often used by high-rise buildings and sofurther study of cone beam structure under the action of lateral force on the mechanicalperformance has high practical value. Specific research contents are as follows:1. This paper, on the basis of the principle of continuous beam tube structureequivalent orthotropic plate and Angle of thin-wall real stomach tube, the tube structuremechanics analysis of equivalent continuous model.2. This paper mainly studies the beam tube structure considering the shear lageffect of the two calculation methods of analysis:(1) The beam tube structure under the effect of bending and torsion of semidiscrete precise integration method.After equivalent to a solid web bundle tube wall from floor to is divided into anumber of finite width strip of units, unit bar adjacent to each other together, all throughthe floor bar unit beam tube structure. Take as the basic generalized displacement, theaxial direction of the displacement along the cross section of the warping displacementusing basic about generalized displacement interpolation function to indicate, that thewarping displacement of displacement is close to the real, it reflects the structure underthe effect of bending and torsion shear lag phenomenon in real.(2) The beam tube structure simplified calculation method of bending problem.Beam tube structure will be equivalent to as a spatial structure system, select threegeneralized displacement: lateral u (z), section Angle (z)and maximum longitudinaldisplacement function w(z)to describe the deformation of the tube bundle. Namely thewarping displacement of beam tube structure makes assumptions.3. Application system solution of the above are applied to solve the preciseintegration method, solving process is programmed by MATLAB language to realize.Analyzes the beam tube bending of lateral structure, warping stress and shear lag effect,compared with other methods, the results are in good agreement, indicates the validity, rationality and feasibility of this method; Comparison and analysis the influence of floorlongitudinal buckling of structure.4. The interpolation precise integration method is proposed in this paper, to expandthe application scope of the precise integration method to two-dimensional problem, towiden the application range and on to solve similar problem provides a new train ofthought and ways.This paper this paper proposes a new approach for the analysis of shell structure,compiled the program is suitable for symmetric cross section and is suitable for theasymmetric cross section, and a variety of load loading forms to choose from, cancalculate the common forms of tube structure. Application this topic the research resultshave certain guiding significance for engineering design.