Abstract
Generally, confinement models of the steel-fiber concrete were very ductile because the fiber has a significant influence on the increase of the concrete deformability. Nevertheless, the existing steel fibrous confined models now have significant differences between each other, especially the peak stress value and post peak behavior. It is some of the different reviewed design parameters that affect the stress-strain equation of developed confined steel-fiber concrete. This paper investigated the existing confinement models to evaluate pre- and post-peak behavior of experimental results of confined steel fiber concrete for square sections. This paper has discussed models of existing steel fibrous concrete restraints compared to the results of experiments. In general, it can be concluded that the Hsu model is able to predict the best K value and ascending branch curve toward the experiment results. However, in the unfettered concrete ductility of the descending branch curve, the predicted values of ε'<sub> cc</sub> and ε<sub>50cc</sub>, it can be said that all the models reviewed are still not able to model properly. The difference is mainly due to the parameters reviewed to lower the restraints of each model are not the same. The comparison results presented in this paper recommend the need for more complete experimental research with broader parameters such as cross-sectional shape, fiber ratio, and restraint bone characteristics, in order to lower the model of restraint more generally.
Highlights
Steel fibrous concrete technology has grown rapidly and popularly in the last decade
When viewed the experimental results (Table 2), the K value based on the Ganesan model differs by at least 4 percent and a maximum of 13 percent
This paper has discussed the models of existing steel fibrous concrete restraints compared to the results of experiments
Summary
Steel fibrous concrete technology has grown rapidly and popularly in the last decade. Steel fibrous concrete is known to have excellent matrix bonding, high cracking firmness, good attachment property and ductile [1,2]. Steel fibrous concrete is very useful to be used in earthquake-resistant structures, especially in column structure components. In earthquake-resistant building structure column structure should have adequate ductility. The model of restraint continues to be developed but until now there is no model that is generally widely accepted as a reference for planning. These restraint models need to be evaluated in depth in order to find out the sensitivity of each model in modeling voltage-strain behavior before and after peak
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