|
Applies to the height of the building structure and high aspect ratio is the basic provisions of the structural design is an important part of the conceptual design. The correct calculation of the height of the building and the high aspect ratio, reasonable provisions maximum applicable height and aspect ratio, is conducive to a reasonable selection of the building, is conducive to the overall grasp of the structure and properties conducive to the economic aspects of structural design control. Concept design at this stage, to the height of the building and high aspect ratio calculation method and the maximum applicable value of the main research content, focus on the the irregular building high aspect ratio calculation method, fortification intensity of 6,7 degrees building structure applicable aspect ratio of the height of the calculation method, and mountain building. The main conclusions of the study was: (1) irregular construction of high aspect ratio calculation method of 1) vertical incorporated into the structure of high aspect ratio calculated as follows: incorporated into the first-order:; second-order revenue: where B 1 < / sub> / B 2 = n, B 1 / B 3 = n 1 , H 2 / H = r, H 3 / H = r 1 ; B 1 , B 2 , B 3 for the width of the structure at the bottom of the first order incorporated into the part of the width of the second-order incorporated into the part of the width of the the H H 2 H , respectively, the total height, the height of the order received into the height of the order received into. 2) vertical cantilever structure aspect ratio is calculated as follows: unilateral cantilever:; symmetrical cantilever: B 1 / B 2 = n H 2 / H = r; B 1 , B 2 for the bottom width of the structure, the cantilevered portion of the width, H, H , respectively, the total height of the structure, the height of the cantilevered portion. 3) plane irregular structure of high aspect ratio formula: B 0 = 2 - (3i) 1/2 ≈ 3.5i, i is the minimum radius of gyration. ② building the largest applicable aspect ratio) in the design structural rigidity, the overall stability of the carrying capacity can be controlled through the economy, and in the case of the economic conditions permit, you can consider the relaxation of the structure of the high aspect ratio. 2) seismic intensity the 6,7 degrees under the framework structure: the aspect ratio increases, the overall stiffness of the structure weakened gradually becomes soft, not particularly obvious indicators of changes in the overall stability of the structure, the internal force does not appear to increase sharply trend, economic increase in the amount of construction steel per square meter large aspect ratio the greater, the greater the amount of steel incremental ability to relax the maximum applicable to high aspect ratio must be carefully considered. 3) seismic intensity of 6 degrees, 7 degrees frame shear wall structure: in the high aspect ratio of 5 6 In addition to the change in stiffness obvious indicators of overall stability, internal forces change The flat economy, per square meter, the amount of steel close to economic changes are not large, it is recommended to the high aspect ratio appropriate to relax. 4) seismic intensity of 6 degrees, 7 degrees under shear wall structure: the current specifications for the aspect ratio of the maximum applicable limit in 6 or more reasonable, the aspect ratio from 6-7, the overall structure stiffness significantly weaker ; economy, the structure of the average amount of steel increased significantly. (3) mountain building height Calculation Method 1) structure, based on existing examples of calculations, the preliminary view that: little structure with different outdoor floor elevation and floor height difference, the height of the building can be considered from the outdoor Ping The highest point of starting; The conclusion is reasonable, and further research is needed. 2) starting point to determine the ground outside of the building on fire, fire fighting, evacuation, fire road should be combined as we consider the starting point of the complex buildings architectural outdoor ground.
|