【摘要】 钢结构框架类型,按其抗侧力体系可以分为:纯框架(UBF)、中心支撑框架(CBF)和偏心支撑框架(EBF)。纯框架具有较好的延性,刚度较小,往往满足了抗震变形要求;支撑框架刚度较大,具有两道纯抗震防线,适应于抗震设防较高的地区。通过有限元软件ANSYS对6层框架进行动力分析,比较这三种框架的抗震性能。由分析可知,支撑框架能较好地控制结构变形。更多还原

【Abstract】 According to the system of resist lateral force,steel structure can divide into unbraced frames,centrically braced frames and eccentrically braced frames.Unbraced frames own good ductility and low stiffness,bur can not satisfy the demand of seismic-resistant’displacement generally.Braced frames own high stiffness and two lines of seismic-resistant defence,and adopted in high seismic-resistant area,then analyzed the dynamical properties of 6-story frame by finite element software ANSYS,compared the seismic-resistant properties of these three types of frames.As a result of analysis,the braced frames can control the displacement of structure.更多还原