The Impact Of Link On Seismic Performance Of A Two-tower Connecting Buildings

The overall structure by two or more independent towers connected to form a structure generally known as two-tower connecting buildings through the link,this structure is due to the facade and unique shape and get a very wide range of applications,at the same time has a very broad prospects,Siamese twin towers structure is one of them.Siamese structure according to the facade forms can generally be divided uniaxial symmetry,symmetry or asymmetry entirely.Because of the complex structure system caused link,the forces are far more complex than is generally the single tower structure, there will be more serious Torsional,the need for coordination corridor originally an independent force and deformation vibrations and two single-tower, single tower between the force and the formation of the overall structure of the system through the interaction and impact deformation link,the "high-level technical specification for concrete structures".such a structure will be defined as a complex high-rise building structure.A two-tower connecting buildings in area of Xian,14 floor on the ground,first floor storey 5.1m,the remaining layers of 3.9m, the structure of the total height 55.8m,building area 38,400m2, single tower frame cut force wall structure,the structure around the stairs and elevator shafts arranged at the appropriate structure to meet the weak parts of shear force and torsional requirements,structure from the 11 th floor of 24 m span steel truss structure link formation of Siamese,the finite element software SAP2000 finite element model of this structure points to obtain the dynamic characteristics, understand the structure of seismic performance.Firstly, the use of finite element modeling software engineering example,get 36 bands before structural vibration period and mode characteristics through the modal analysis results show that the X and Y direction modal mass participation factor of more than 90%, in line with regulatory requirements structure translational and torsional period ratio is also compliant to the complex structure of less than 0.85 level Siamese requirements; also discussed the impact of the different layers under the link,the location and connection of the structure and other engineering parameters and modes of the cycle.Secondly response spectrum analysis of structure internal force and deformation analysis obtained by calculating overall structure to meet specification requirements for seismic resistance and comparative analysis of different layers in the corridor,the location and connection of the structure by modal decomposition floor displacement, inter-layer displacement angle,the floor and the base shear shear influence to obtain top-level displacement.When the last of the power structure analysis process,select the two natural wave and an artificial wave,taking the structure represented by the top and get away Siamese layer structure displacement and acceleration curves,curve analysis of the effects of different floor acceleration and displacement;while three seismic shift under different connection, acceleration and base shear analysis and comparison and discussion.