Fig. 2 Thermomechanical curve of epoxy specimen: experimental and numerical results.
The 'I' shaped plan part of the specimen was first tested and the effective rotational stiffness of the joints with steel plates was estimated by comparing roof displacements of the test specimen and a numerical model.
Percentage reduction in bond stress for different levels of corrosion, i.e., 2.5, 5, 7.5 and 10 % with respect to control beam specimen was 6.59, 13.17, 21.56 and 29.34 %, respectively, for experimental concrete beam specimens and for numerical analysis it varies as 7.6, 15.82, 24 and 30.4 %, respectively.
Percentage reduction in bond stress for different levels of corrosion, i.e., 2.5, 5, 7.5 and 10 % with respect to control beam specimen is 6.6, 13.2, 21.6 and 29.4 %, respectively, for experimental concrete beam specimens and for numerical model it varies as 7.6, 15.8, 24.1 and 30.4 %, respectively.
Both the conventional J2 flow theory and the Gurson Tvergaard porous plasticity model are used in simulations of smooth and notched tensile specimens, and the numerical results are compared with experimental data.
The strengths and failure modes of specimens obtained from experimental and numerical results were compared with design strengths predicted using the direct strength method specified in the North American Specification for cold-formed steel structures.
For every percentage increase in corrosion level, there is about 1.6 and 1.8 % decrease in load-carrying capacity for experimental and numerical model beam specimen, respectively.
Load strain behavior for experimental beam and numerical model beam specimens is shown in Figs. 12 and 13, respectively.
The thermal and mechanical responses of the insulating specimens are also evaluated by experiments and numerical methods.
