3Choi,shimis,IBEom,C Het Alan.experimental study on the strength and stiffness of concrete filled steel column connections with external stiffener rings[C].Proceeding of 4th Pacific Structure Steel Conference,Vol.2,Pergamon,U.K.,2010a:1-8.
6Choi,Shimis,IBEom,C Het Alen.Elastic-plastic behavior of the beam to concrete filled circular steel column connections with external stiffener rings[C].Building for the 21st Century,Y.C.Loo(Editor),Griffith University Gold Coast Campus,Australia,2010b:451-456.
7Chang-Koon Chol,Gi-Taek Chung.Refined three-dimensional finite element model for end-plate connection.Journal of Structural Engineering,2011,122(11):341-352[Z].