摘要
将隅撑支撑与半刚接钢框架结合形成的新型支撑钢框架称为隅撑支撑半刚接钢框架。为了研究其在地震作用下的破坏过程,采用有限元软件SAP2000进行了Pushover分析。研究结果表明,罕遇地震作用下,框架中的隅撑和斜支撑率先屈服,耗散大部分地震能量,从而保护了结构的主体构件框架梁和框架柱;梁柱节点的初始转动刚度对结构的抗震性能有很大影响,随着初始转动刚度的降低,结构的极限承载力也在降低,并且过低的初始转动刚度会改变结构塑性铰的发展顺序和结果,因此选择合适的初始转动刚度是隅撑支撑半刚接钢框架抗震设计的关键。
The combination of knee brace and steel frame with semi- rigid connections is a new type of the braced- steel frame system,which can be called ＂knee braced semi- rigid steel frames＂. In this paper,the finite element software SAP2000 is adopted to do the Pushover analysis on the destruction process of the knee braced semi- rigid steel frames under an earthquake action. The results show that knee brace and sway brace components are first to yield under rare earthquake action. In this process,most of the earthquake’s energy is dissipated to protect the main structural component of the structure frame beam and frame column. And the initial rotational stiffness of beam- column joints has a great effect on the seismic performance of knee braced semi- rigid steel frames. With the reduction of its initial rotational stiffness,its ultimate bearing capacity is also reduced. As the low initial rotational stiffness will change the development sequence of plastic hinge and results,so the right initial rotational stiffness is key to the aseismatic design of the knee braced semi- rigid steel frames.
出处
《西南科技大学学报》
CAS
2016年第4期38-44,共7页
Journal of Southwest University of Science and Technology
基金
西南科技大学研究生创新基金资助项目(16ycx071)
