Not All Buried Basement Roof As High-rise Buildings Built In The Study

High-rise buildings built in the selection is an important part of high-rise structure calculation analysis,the result of selection directly influence the accuracy of the structural model analysis and the safety of the structure,and with all the high-level structure of the buried basement fixed end selection problem is in the daily work of embedded a difficulty in structural designers.Currently,about all buried in the basement of research on the effects of structure built-in function a lot,but the study of all buried basement is relatively small,hence the blind design,often buried safe hidden trouble of structure design.Based on the above situation,this article through the theoretical research and case analysis,for not all buried basement roof as the upper structure built in the conditions and related problems are studied,the main research contents and achievements include:(1)from the contrast of mechanical characteristics of buried basement out all buried mechanical characteristics,summarizes the existing at the present stage of structure to the built-in norms,points out the basement in all buried structure design deficiencies and disadvantages,comparing the specific design for structure design personnel and provide a reference.(2)according to the specification in the floor under the action of the equivalent lateral stiffness and earthquake shear force and displacement between layers(Angle)stiffness ratio and the lateral stiffness of bending stiffness of three kinds of different requirements,from the aspects of definition,usage,advantages and disadvantages of several summary,it is concluded that the equivalent lateral stiffness ratio is the best choice for calculating the lateral stiffness ratio.(3)in the tower of the buried basement roof roof relevant range,the adjacent upper and lower layer of the lateral stiffness ratio meet the specification in the built-in end side just than for 2 requirements,is the built-in end can be used as the upper structure.(4)using PKPM software,the jinshuihupan project all buried basement structure finite element analysis,through the basement of high-rise towers on both sides of the airport,the embedded structure of different fixed end position from the dynamic characteristics,the comparison between the displacement and internal force characteristics,and points out that the basement buried in all cases,combined with the building function,by increasing the basement shear wall,meet the requirements of side just for 2,build-in parts can be located in the basement on the roof.(5)when all buried basement roof is regarded as the built-in end of the upper structure,the basement roof have build-in nots allow to ignore,as well as the basement roof itself up and down the vertical stiffness mutation,in response to the basement roof according to the specification requirements of build-in side,a layer of the vertical component of reinforcement design the ground,dealing with the basement floor also for reinforcement of the built-in end adopt envelope design method of design.