| The technique of steel interlayer structure was adopted widely in tall concrete building. In order to extend application of this technique, this paper introduces its usual structural system, seismic design procedures and effect on main building combining with some study cases. Meanwhile this paper provides calculation methods and some structural design suggestion compared with the existed project.The main research contents in this field are as follows:1. Correlative technique:From rational structural scheme perspective, steel frame structural system is pointed. The section types of steel frame beams and columns and connection details between steel interlayer structure and main building are introduced.2. The seismic analysis:According to the code for seismic design of building and combining with some study cases, the dynamic characteristics of tall frame-shearwall concrete structure with steel interlayer structure are analyzed through making three-dimensional finite element models. The results include the changes of mass, stiffness, structural vibration cycle, main modes, force and displacement before and after adding steel frame storey. The results are compared and studied which can be served as the basic of such structure design.Using SATWE software, the analysis is done for interlayer steel structure and further anti-seismic optimized measures are advanced.All the results described above draw a conclusion:The technique of steel interlayer structure has many remarkable aspects on safety, economy and environment protection; Technical specification of main building is affected by steel interlayer structure too small; Some members of steel interlayer structure require anti-seismic design. |
