The Comparative Analysis On Different Energy Dissipation Structures In Highly Seismic Region

Seismic research of the high-rise buildings in highly seismic region is one of the direction which need to be resolved in the disaster prevention and mitigation field.At present,the seismic design method of traditional structure is enable the structure have enough strength,stiffness and ductility to achieves the aseismatic fortify goals.This design methods of strengthen structure can't reduce the earthquake responses effectively, and cost is high.In order to solve the problem of the high-rise building hard to reach the requirements of seismic performance in the highly seismic region.Combined with technical characteristics of isolation and energy dissipation technology.The mian works and conclusions are as follow:1. A frame shear wall structure in the seismic fortification intensity of nine is analyzed.Design problems of structure in highly seismic region should be paid attention to. Due to the ductility and seismic performance of the composite structures.It meet the performance index under the frequent earthquake.The axial force of part of the columns are from compressed into tensile condition under the middle earthquake.Internal force of structure are increased under the earthquake effect.The force of the component in the structure design of highly seismic region should be attention.2.Based on the disadvantages of ordinary anti-seismic design in the highly seismic region.Such as the big section size and bearing capacity of seismic requirements can't be satisfied.Mixed isolation design is used to design a frame shear wall structure in these area.The analysis results show that the seismic fortification intensity of the the superstructure can be reduced by one degree. The isolation bearing stress of the high-rise building in rare earthquake is limited by the code. Viscous dampers can reduce the earthquake response of the upper structure.And the isolation layer displacement is limited by the code effectively.3.A frame shear wall structure with viscous dampers, lead-viscoelastic dampers, buckling-restrained braces and frame-braces are analyzed. The analysis results show that structure interlayer displacement angle, floor stress, shear wall stress, the bending moment and shear of the column are reduced on different degree when used the damper. A lot of energy is dissipationed under the rare earthquake when used the dampers.These effect of reduce earthquake is remarkable. In addition, the control effect of viscous dampers is best. Viscous dampers should be preferred used in the aseismic design of such structure in high intensity area.4. The different structure schemes are used in a specific project .Through the different structure schemes for economic analysis. The strength and rigidity are improved by increasing the structure of section in ordinary anti-seismic structure. The cost of materials is high.The section and reinforcement of base-isolated and energy dissipation structure is decreased.All the initial cost of base isolation and energy dissipation structures are lower than anti-seismic structure. Therefore, these two technology are economical technology reduced the earthquake.