Research Of Hysteretic Energy Demand Distribution Law Of The Chevron Steel Braced Frames With Buckling Restrained Brace

The strength design theory which can indirect consider the ductility is taken by the the current seismic code.It can not fully consider the plastic performance of structure;Design method based on energy integrated force,displacement,seismic parameters,it can make a fully evaluation about earthquake damage as of the structure.Hysteresis energy is closely related to the structures members,it is the main control parameters of the energy design method.The distribution of the hysteresis energy in the structure is an integral part of the energy design method.Using ABAQUS to analyzes the impact which are far-near conditions,factors of ground motion,structure parameters on the distribution of interlaminar hysteretic energy demand and it's distribution law of the Chevron Steel Braced Frames with BRB,the following work:First of all,the design of six kinds of BRB steel frames.Selecting a certain number of suitable natural and artificial seismic waves for each model.Secondly,Carrying elastic-plastic time history analysis on the six models,the number of floors,peak acceleration(PGA),damping ratio,strong time,structure height,span,span number and material tangent modulus have been considered in the analysis.Studying the impact of these factors on the distribution of interlaminar hysteretic energy demand and it's distribution law of the Chevron Steel Braced Frames with BRB.The results show that PGA and the number of floors under far field earthquake condition have great impact on the distribution law,near field pulse earthquake have a shock effect on the structure,lateral Angle has significantly exceeded the standard specified value between the layers.The formulas for distribution ratio of interlaminar hysteretic energy demand of BRB Frames are analyzed under far-field seismic records and the energy design process of BRB Frames are proposed.