Research On High-rise Assembled Orthogonal Slanting Space Steel Grid Box-tube-in-tube Hybrid Structure

The mixed structure of the box tube-in-tube is one of the new construction series proposed by academician Kejian Ma,which is suitable for high rise and super high rise buildings.The difference between the structure and the traditional tube-in-tube mixing structure is the lateral bearing system and the outer cylinder force transfer system.Meanwhile,the overall mechanical performance is better than that of the tube in tube mixing structure.In order to popularize the mixed structure of cartridge tube,this paper expounds the mechanical properties,economy and assembly.This paper first introduces the development and research status of mixed structure at home and abroad,and leads to the concept,type and research status of the box structure.Then,the basic principles of the transverse hollow sandwich plate and outer cylinder wall part which constitute the box cylinder middle cylinder mixed structure are introduced,which provides a theoretical basis for the research of the box cylinder middle cylinder hybrid structure.Then the proposed high-rise building as an example,consider the structure height and plane size limit,a tube in tube mixed structure and tube in tube hybrid structure are established respectively by the static method,the dynamic elastic-plastic time history analysis method and the method of comparative analysis of the cartridge tube in the mixing cylinder and cylinder structure cylinder structure seismic time history analysis research shows that compared to cassette tube in tube hybrid tube in tube structure and mixed structure,the basic mechanical properties of the structure are similar,but some indicators for cassette tube in tube hybrid structure is slightly better than the tube in tube structure;economic performance of cylinder structure is better than the cassette tube in tube hybrid structure;using seismic time history analysis method can effectively predict the seismic performance of the structure;seismic time history analysis method of the mechanical performance index began to collapse with the traditional tube structure in the past The mixed structure of the middle cylinder is similar.Finally,the connection structure of the cartridge tube and the central tube hybrid structure is emphasized,and some coordination problems that need to be considered between the various parts of the assembled building are discussed.