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- W2390876416 abstract "Three welded beam-column connection substructures of steel frame with two kinds of weld access holes( fan-shaped and enlarged weld access hole) were designed based on the Chinese seismic code and relevant references. The impact tests using drop-hammer were carried out to simulate the dynamic behavior of structural progressive collapse. The failure modes and time histories of impact load and deformation were obtained,and the response regularity of the impact load and deformation time histories were analyzed as well as the dynamic rotation and energy dissipation of the substructure. Test results show that the structural detailing of weld access hole has a significant effect on bearing capacity and deformation performance of the connections under impact loading. The reinforced weld can effectively improve the local buckling behavior of upper flange of the welded connections with enlarged weld access hole. Compared with the specimen with fan-shaped weld access hole,the specimen with enlarged weld access hole has better rotation capacity to resist impact loading,while its ultimate rotation reaches the seismic design limit( θ = 0. 064 rad) of FEMA 350. The internal force development of specimens during the impact loading was analyzed and it demonstrates that the premature failure of the welded beam-column connection degrades the formation of catenary action. Therefore,the steel frame with welded connection can not give full play to catenary action due to the deficiency in connection rotation." @default.
- W2390876416 created "2016-06-24" @default.
- W2390876416 creator A5047261391 @default.
- W2390876416 date "2014-01-01" @default.
- W2390876416 modified "2023-09-23" @default.
- W2390876416 title "Experimental study on collapse resistance of welded beam-column connection substructure of steel frame based on seismic design" @default.
- W2390876416 hasPublicationYear "2014" @default.
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