| This paper mainly on the research on the conditions with rational ascertainingthe partial fixing of high-rise building by using the finite element software andcombining with related regulations, separately from the lateral stiffness ratio, rigidand basement roof with large area basement of high-rise building three aspects suchas the research and analysis to embedded fixed end of rational selection decisioncondition. The main work content as follows:First, set up two kinds of different structure forms of high-rise building modelto study the lateral stiffness of the different dynamic characteristics of the bottomof the level structure mounted, deformation characteristics and the internal forcecharacteristics of the performance.Second, analyzed the roof as high-rise structure in the basement of the bottompart of the roof of the embedded solid rigid request, separately from the basementthickness, roof open hole rate to the basement two study of high-rise structurebottom roof rigid embedded solid effect.Third, discussed the high-rise building with a larger area of the basement of thebasement of the lateral stiffness ratio calculation, and analysis of the basement partof the structure outside the main structure of the role of the high-level structure ofthe bottom of the embedded solid.Through the analysis of this research, can reach the following conclusion:First, for top reinforced concrete frame structure and shear wall structure, whenthe basement and adjacent the upper floor structure than lateral greater than2, butwill the basement roof as the upper structure embed the fixed end, the upperstructure can be separately modeling analysis and calculation, the calculationresults and the overall modeling results compared with little error.Second, when the basement roof as the upper structure embed the fixed end, itwas thought the economy of the engineering, suggested that the basement thicknesstake180mm to200mm advisable; When the basement roof open hole rate is lessthan30%, but will the basement roof as the upper structure embed the fixed end,the upper structure can be separately modeling analysis and calculation, thecalculation results and the overall modeling results compared with little error.Third, as to the high-rise building with a large basement and some small towers, in the judgment embedded structure of fixed end lateral stiffness ratio ofcalculation, the main structure outside the scope of the basement can take only themain structure to extension for2across the lateral stiffness ratio of computation.By increasing the subject structure outside the scope, the basement beams andcolumns of the stiffness and affiliated basement line across several, within thescope of the main structure basement side force component internal force reducegradually, this to the basement roof as high-rise structure embedded fixed end, thebasement itself to withstand the upper structure yield super and their own by theearthquake action ability is obviously improved. |
