Study On The Application Of Local Steel Strength Weakening Technique In Energy Dissipation Device

The buckling-restrained brace and shear panel damper are the two most widely used energy dissipators.Traditional buckling-restrained brace and shear panel damper's energy dissipation general inner core with low yield point steel,but because of low yield steel imports are expensive,so how to make use of the domestic steel preparation of low yield point steel will become the development trend in the field of structure seismic.This article will to interdisciplinary adopt heat treatment system technology research and development of steel local strength weakening,and applied to structural seismic areas develop a novel locally weakened buckling-restrained brace and partial shear steel panel damper,the energy consumption can realize constant area inner core strength weakened,specific content as follows:Firstly,the technology of local strength of steel is used to treat the inner core steel with high temperature and heat treatment.Based on the results of this study,a new kind of locally weakened buckling-restrained brace is designed and the new type of locally weakened buckling-restrained brace and the normal buckling-restrained brace are carried out in a cyclic cyclic loading test.Through the in-depth analysis of the hysteresis curve of the specimen,the increase coefficient of the compressive bearing capacity and the supporting energy consumption index,the energy dissipation performance of the new type of locally weakened buckling-restrained brace is investigated.Next from looking at the domestic and foreign scholars to the in-plane stability of buckling-restrained brace overhanging inner core and the research of design method,combined with new locally weakened buckling-restrained brace test results,the specimen overhanging section in-plane buckling of the inner core failure mechanism was analyzed.On the basis of the new locally weakened buckling-restrained brace overhanging section within the plane of inner core stability design method for a certain degree of exploration,strong for the future new locally weakened buckling-restrained brace deepening design provide effective reference.Based on the good application of local strength weakening technology in the new locally weakened buckling-restrained brace,the technology of local strength weakening of steel is introduced in the shear panel damper.The finite elementsoftware ABAQUS is used to establish a locally weakened shear panel damper model with local low strength steel.By analyzing the finite element results of the panel for locally weakened steel and ordinary steel,the advantage of the damper of locally weakened shear panel damper was investigated.Then,the energy dissipation performance of the damper of the double locally weakened shear panel damper and the four locally weakened shear panel damper are further explored from the angle of hysteresis curve,skeleton curve and equivalent viscous damping ratio.A damper is selected from the double,four locally weakened shear panel damper and the numerical analysis is carried out.Study web ultra-high temperature processing area of thinning layout affect the performance of energy dissipation damper,surveying the hysteresis curves,skeleton curves,the equivalent viscous damping ratio,stiffness degradation,and degradation coefficient of bearing capacity,the resulting web optimal treatment scheme.At the same time,the influence of the thickness of different abdominal plates on the energy dissipation performance of the damper is also studied.