Research On Complex Selection Design Connected High-rise Structure

Tall building connected structure as the new structural system, with itsuniqueappearance and function, it is gradually known and loved. Tall buildingstructure is different from the general high-rise buildings, one is its multi towerjointly arranged on a chassis, on the other hand, the tower by the overhead connectedto be a whole, which makes the design and analysis of tall building structure moredifficult.Based on the background of a tall building structure the actual, the structure typeof the modified design, the concrete filled steel tube columns, steel beams, concretecore tube steel-concrete compositestructure, steel frame design of concrete filledsteel tubular column can not only ensure the requirements of building large spaceflexible layout,characteristics, also ensure that the bearing capacity, avoid using alarge sectional area; Concrete core tube can improve the lateral stiffness of thestructure, bear the horizontal shear key, improve the capacity and seismic behavior ofthe whole structure. Modeling and analysis of the finite element software, to explorethe effects of mixed structure in tall building force in morphology. Application ofsteel concrete mixed structure of single tower structure, curve shift base-vertex sideanalysis of the floor can be seen, between curves between shear and bending type,which belongs to the shear bending. On the part of the selection analysis, contrast,open deck, deck and cable-stayed type four truss layout, the effect of four kinds ofstructure forms on stiffness and vertical rules connecting structure is vertical, and fourkinds of truss arrangement under the inner force distribution and stress in thefloor.Analysis shows that the vierendeel truss members of the axial force is small, butthe moment value is larger, internal connecting body is the main component ofbending mechanism to transfer, the efficiency is low; deck and deck slab stress isabout2times the cable-stayed type floor stress, a comprehensive analysis of thecable-stayed truss layout is an integrated scheme is the best. In cable-stayed flooroblique rod and the vertical bar at the intersection of truss is the main force of floor, the need for thickening on the floor, in order to ensure the normal use. Through theanalysis of the single tower base-displacement curve, we can see the deformationcurve of single tower structure is mixed cut curved. The results show that the overallstructure, because the connection settings, resulting in the floors connected stiffnessmutation, mutation points to form the displacement curve; the wind load and seismicloads of X, Y direction of the shear force, overturning moment, the interlayerdisplacement angle analysis, seismic effects play a major role. The overall structureof the erection of steel truss in the twenty layer, resulting in integrated floor stiffnessmutation, the integrated floor next layer forms a weak layer, so the lateral structure inX direction stiffness, shear capacity are mutations.Tower in X, Y direction stiffness toweight ratio greater than2.7, therefore does not need to consider the influence of twoorder effect. Through the analysis of the floor displacement curve of wind load andseismic load, can see the tapping displacement responses of concrete mixed structurepresent in the bending deformation, the concrete core tube hybrid structure is still themain anti lateral force component. Comparison of the dynamic characteristics ofsingle tower and Twin Towers, we can see that both the period ratio and the first, twoorder cycle is basically the same, because Twin Towers structure hypothesisconjoined, the integrated structure of order third and above modal form changed,cycle becomes smaller, the third order translational and torsional coupling vibration isobvious.