A parametric study on the interaction curves for steel beam-columns in fire conditions is performed. The study is based on a trilinear idealization of the uniaxial stress-strain relation for steel at elevated temperature and aims at assessing the influence of the slope of the hardening branch, on which results are strongly dependent. A refined and numerically efficient elastic-plastic beam element model is employed to analyse different load conditions and temperature distributions. Results for uniform temperature are systematic enough to permit fairly general analytical approximations, which might be useful also in the presence of temperature variations along the element length only. Thermal gradients through the cross-section are also considered.
Interaction domains for steel beam-columns in fire conditions
POGGI, CARLO;SETTI, PAOLO PIETRO
1990-01-01
Abstract
A parametric study on the interaction curves for steel beam-columns in fire conditions is performed. The study is based on a trilinear idealization of the uniaxial stress-strain relation for steel at elevated temperature and aims at assessing the influence of the slope of the hardening branch, on which results are strongly dependent. A refined and numerically efficient elastic-plastic beam element model is employed to analyse different load conditions and temperature distributions. Results for uniform temperature are systematic enough to permit fairly general analytical approximations, which might be useful also in the presence of temperature variations along the element length only. Thermal gradients through the cross-section are also considered.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
