Precast Concrete (Structural aspect)Ⅱ/Highstrength concrete (structural)

[2110] NUMERICAL MODELING OF SQUARE STEEL-TUBED REINFORCED ULTRA-HIGH-STRENGTH CONCRETE COLUMNS UNDER AXIAL COMPRESSION

Xuechun HUANG¹, Naresh SUBEDI¹, Nobuaki HIRATA², Susumu KONO¹ (1.Tokyo Institute of Technology 2.Haseko Corporation)

Keywords:steel-tubed reinforced concrete column、ultra-high-strength concrete、finite element method

Due to the limitation of experimental data for steel-tubed reinforced ultra-high-strength concrete columns (STR-UHSC) with a square section, a valid numerical model is necessary to gain a better understanding of the compressive behavior of STR-UHSC. Finite-element models are developed in this study and the validity of the models is confirmed by axial load-axial strain relationships, strain in the steel tube, and failure modes. Significant features such as the rupture of the transverse reinforcement, buckling of the longitudinal reinforcement, and more were reproduced in the simulation.