| Steel frame buckling restrained brace structure is an efficient high performance structure with the advantages of good elasto-plasticity,light weight,high energy consumption and high stiffness.As a high-performance building structure,it is likely to be affected by a variety of disasters during its service.In this paper,the dynamic response of steel frame buckling restrained brace structure under the combined action of wind and earthquake is studied.The specific research contents are as follows:(1)In this paper,the natural regression method is used,and the target spectrum is Davenport spectrum of Chinese code.The wind load time history curve is obtained by numerical simulation of fluctuating wind speed.(2)The dynamic time history analysis of buckling restrained brace steel frame structure under the combined action of earthquake and wind is carried out.The analysis shows that the wind load will increase the dynamic response of the steel frame buckling restrained brace structure,and the influence of wind load is relatively large under frequent earthquakes,while the influence of wind load is relatively small under rare earthquakes.(3)The vulnerability curve of steel frame buckling restrained support structure under the action of earthquake and wind load can be found that the greater the wind speed will damage the structure under the same seismic intensity.At the same time,the influence of wind load on vulnerability is also related to the intensity of ground motion.The greater the intensity of ground motion,the smaller the impact of wind load on the damage of steel frame buckling restrained braces. |
