钢框架结构新型耗能梁柱节点的抗震性能和设计方法-结构工程专业论文.docxVIP

钢框架结构新型耗能梁柱节点的抗震性能和设计方法Seismic 钢框架结构新型耗能梁柱节点的抗震性能和设计方法 Seismic Behavior and Design Method Of The New Connections For Steel Frames Abstract After Nortiridge and Kobe earthquake．it was found that the traditional beam—column jionts in steel frame happened brittle failure largely．Scholars at home and abroad had done many researchs about improving the beam·to-column connections after the earthquake．At present，the method of improving the jionts have reduced section beam connections and reinfored connections．111is solution．despite being able to successfully concentrate plasticity and avioding brittle failure in jionts，presented difficulties in terms of the reparability of damaged parts of the structure．In order to achieve more efficient earthquake resisitant structures，all innovative fuse device for dissipative beam—to-column connections in seismic resistant steel frames WaS developed．nle device consists on steel plates welded to the web and lower flange of the steel beam and steel cover．Damage was concentrated only within the devices，which proved to be easy to replace，with the remaining parts of the structure lying under the elastic range．Through the finite element analysis and theoretical analysis，the performance of the new j ionts and structural forms are discussed，and putting forward the designed method of the new connections in this paper．What is more，theoretical formula were calibrated based on the the numerical models results，and to the discussion of the factors that influence its seismic performance．The detailed research contents are as fllows： (1)In view ofthe dissipative plates yielding ahead ofthe beam—to—columnjoints and the beam and column lying under the elastic range，the size of the dissipative plate was derived in the paper．To ensure the global stability of the fuse device，the inertia moment requires for the device Was obtained based on the strength required for the steel cover．The contact force between the dissipative plate and the rectangular—shape cover