SHEAR CAPACITY AND CONFINEMENT REINFORCEMENT REQUIREMENTS ANALYSIS OF HOLLOW REINFORCED CONCRETE SQUARE COLUMNS

• Main Author: Arditama, Fahryan
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/82588
• Institution: Institut Teknologi Bandung

Columns play a crucial role in resisting axial compressive forces in structural systems, exemplified by their use as bridge piers. To mitigate shrinkage, hollow reinforced concrete columns (HRCC) emerge as a promising solution. HRCC effectively reduce self-weight, leading to a diminished seismic responsse. This aligns with sustainable construction principles by minimizing concrete consumption. However, a significant challenge arises from the lack of well-defined references pertaining to the accurate calculation of shear capacity and confinement reinforcement requirements for HRCC. This research addresses this gap by investigating the shear behavior of HRCC and finding the key parameters for calculating their shear capacity. The research methodology involves defining key parameters including cross-sectional width, effective height, transverse reinforcement area, and effective confinement area. These parameters are evaluated using analytical models from SNI 2847:2019, ACI 318-19, Ascheim et al. (1992), Shin et al. (2013), AASHTO LRFD 2020, UCSD modified (2017), and CALTRANS 2003. The calculated values are then compared with experimental data obtained from literature. The findings demonstrate that employing an effective concrete area definition that accounts for the hollow section (i.e., reduced area) yields more accurate results. The Effective depth is the distance from the outermost compressive concrete to the center of the tensile reinforcement.