Resistance factor calibration for cold-formed steel compression members

Rem: Revista Escola de Minas

Marcilio S. R. Freitas²  André L. R. Brandão¹  Arlene M. S. Freitas¹ 

[1] ,Universidade Federal de Ouro Preto Escola de Minas Departamento de Engenharia Civil

关键词: Cold-formed steel;    compression members;    calibration;    reliability index;    Structural Reliability;    Perfis formados a frio;    membros comprimidos;    calibração;    índice de confiabilidade;    confiabilidade estrutural;   

DOI  :  10.1590/S0370-44672013000200015

来源: SciELO

【 摘 要 】

The objective of this paper is to provide a review of the calibration procedure of the resistance factor for a target reliability index. Resistance factors for cold-formed steel columns are calculated with a first order second moment reliability approach. A test database of 323 cold-formed steel columns concentrically loaded with plain and lipped C-section was assembled, and test-to-predicted statistics were obtained for the three design methods available in Brazilian cold-formed steel code: the Effective Width Method (EWM), the Effective Section Method (ESM) and the Direct Strength Method (DSM). For the normal load combination, dead-to-live load ratio of 1/3, and target reliability index or =2.5, the calculated resistance factors, g, for the three methods are consistent with current value specified by Brazilian code. For all methods, with target reliability index or =3.0, the calculated resistance factors, g, are higher than the current value used in Brazilian code.

【 授权许可】

CC BY   
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