Interaction diagrams for concrete-filled tubular sections under fire

摘要：

Strength interaction diagrams are useful tools for composite steel and concrete cross section analysis and design. They relate ultimate values of bending moments and axial force, allowing quick assessment of a cross section strength. Under fire action, the behavior of the cross section changes considerably, and these diagrams become dependent on the temperature field. The fire action introduces thermal strains and modi-fies the stress-strain relationships. The purpose of this paper is to present an algorithm for the construction of strength interaction diagrams for concrete-filled hollow sections subjected to fire. The diagrams are obtained by a stepwise variation of the deformed configuration, under assumptions of conventional ultimate strain values for concrete and steel. The procedure is illustrated by the construction of interaction diagrams for circular and square concrete-filled hollow sections.

作者: J.B.M.Sousa Jr. R.B.Caldas R.H.Fakury

作者单位: DECIV,Escola de Minas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil DEES, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil

会议类型: 国际会议

会议名称: 第12届钢管结构国际学术会议(The 12th International Symposium on Tubular Structures)

会议地点: 上海

会议语种:英文

页码: 635-640

在线出版日期: 2008-10-08（万方平台首次上网日期，不代表论文的发表时间）