Effect Of Arrangement And Connection Of Strengthened Story On Vertical Deformation Of Super High-rise Building

With the continuous development of economic and construction technology, high-rise buildings in China have mushroomed all over the massive emerge. High-rise building is the product of contemporary socio-economic development and technological progress, on the one hand to solve the problem of the shortage of urban land, on the other hand it is becoming a symbol of the city’s landmark and social prosperity. In order to cope with too large lateral deformation in high-rise building, the outer frame with reinforcing layer- the core tube structure emerges gradually. But at the same time, the additional stress will appear. It allways be solved by articulated connection and delayed closure. Based on previous research results to further improve the level of super-tall reinforcing layer reducing vertical deformation, and its purpose is to strengthen the layer selected areas of engineering practice when providing advice and information.By Shenyang Bao Neng T2 tower construction simulation analysis of super high-rise projects, as cited cases, followed by the finite element software MIDAS/GEN verifying high-rise buildings contrast enhancement layer’s role, we obtained preliminary conclusion that reinforcing layer has obvious influence on vertical deformation.Reinforcing layer’s impact analysis of super-tall vertical deformation, firstly we think of the impact of the different arrangement of reinforcement layers. Its layout includes both vertical and flat. In the vertical layout, the strengthening layers can be set at different levels and multiple floors. Flat layout, including arrangement only outriggers, furnished only waist truss while the truss layout outriggers and waist; arranged a jib arm or road; arrangement of one or more layers arm and waist truss; outriggers in the middle or on the corners; outriggers when transverse and longitudinal reinforcement layer accounted for two-arranged alternately or simultaneously arranged in a two-way. Using the control variable method, a more comprehensive study about the influence of individual factors reinforcing layer effects and influence extent of vertical deformation.It will obtain reinforcing layer’s impact analysis on the buildings of different heights, on their difference of vertical deformation analysis. Establish the three super-tall models of 100 m, 200 m, 300 m. Each building of different hights compares through a detailed analysis of vertical deformation, get the answers about characteristics of different hights and the sensitivity about setting the reinforcing.In order to reduce the additional stress of outriggers, articulated connection and delayed closure can be chosen. Rules say it must be reliable in cantilever truss rigid connection with core tube, but connection with the outer frame is not mandatory. Based on the three different connection modes of rigid connection, semi-rigid connection, articulated were calculated and outrigger truss vertical deformation, we get the influence of connection mode cantilever truss and frame on the difference of vertical deformation and internal force of outrigger truss. Delayed closure means: segmented assembly, the lower truss can be closed in the upper truss construction time; while only a jib, in the main after construction is completed closed. Through the construction of simulations in T2 tower model, we use construction delays or not to compare the degree of prejudice to draw different construction methods on vertical deformation.