Experiment of behavior of Hsteel columns strengthened
with partially encased concrete
1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
Abstract：The ordinary Hsteel frame columns were partially encased with concrete for strengthening to prepare Partially Encased Composite Columns (PEC Column). The uniaxial compression tests of six specimens of PEC Column with two difference cross sections were conducted, the text analysis and summarize the mechanical characteristics of loaddisplacement curve, bearing capacity, stiffness, ductility and damage mode were analyzed for PEC Column with three different kinds of structures. The results show that the PEC column has high load bearing capacity and stiffness. According to the test results of three different structure forms of frame column, the specimens with tension bar have higher bearing capacity and larger stiffness. The tension bar can wall limit the relative drift between concrete and steel, which improves the bearing capacity of concrete. Setting tension bar in frame columns, the concrete is subjected to larger limitation to obtain better binding power between concrete and steel plate. The yield displacement is increased, and the ultimate displacement of frame column is decreased with reduced ductility.
2017, Vol. 38 
