Partially encased composite steel and concrete columns: a systematic approach to the literature

Partially encased composite columns emerge as a promising solution in structural engineering, combining the versatility of steel with the durability of concrete. This article explores their characteristics and advantages, highlighting the construction efficiency and resource savings they offer compared to traditional reinforced concrete structures. While steel provides strength and speed in construction, concrete offers protection against fire and compression. The study consisted of two stages: the systematic literature review, in which the most relevant bibliography for the objective of the article was selected, and the meta-analysis stage. The studies indicated a decrease in the initial stiffness, maximum load and ultimate strength of the columns, with an increase in eccentricity, as well as an increase in the peak axial load and final moment of resistance in high-strength concrete, especially in slender columns which present reduced peak axial load due to the increase in the slenderness index. Furthermore, partially encased columns demonstrated superior compressive strength to steel at high temperatures. Therefore, these columns represent a promising option, subject to additional considerations and specific studies.