Seismic behavior experimental study of frame joints with special-shaped column and dispersed steel bar beam  

作　　者：Shuchun LI Bo DIAO Youpo SU 

机构地区：[1]Department of Civil Engineering,Beihang University,Beijing 100083,China [2]University for Science&Technology Beijing,Beijing 102206,China [3]College of Civil Engineering,Hebei Polytechnic University,Tangshan 06300

出　　处：《Frontiers of Structural and Civil Engineering》2009年第4期378-383,共6页结构与土木工程前沿（英文版）

基　　金：This work was partly financial supported by the National Natural Science Foundation of China(Grant No.50678016).

摘　　要：To overcome the problem that steel bars are put too close at a flame joint with special-shaped beam and column,mechanical performance of three groups of six RC flame joints with special-shaped(L,T and+)column and dispersed-steel bars-beam on the top floor under cyclic loads were studied.Experimental comparison was conducted between special-shaped(L,T and+)column and normal beams.The cracking load,yielding load,ultimate bearing capacity,failure patterns,and hysteretic properties at joint core area were investigated.The seismic behaviors of the joints with different proportions of dispersed-steelbar beams were analyzed.The results of experimental analysis indicate that the mechanical and seismic behaviors of frame joints with T-shaped and+-shaped column are nearly not changed when suitable proportion steel bars are dispersed to flange plane.Stiffness degeneration of flame joint with L-shaped column is rather serious due to concrete damage stiffness.Theoretical result indicates that distributing area of the dispersed steel-bar beams in the flange plate should be strictly controlled to avoid anchor destroy.

关 键 词：beam with dispersed steel bar flame joints with special-shaped beam and column seismic behavior scale of dispersed steel bars 

分 类 号：TG1[金属学及工艺—金属学]