Title: Cyclic Loading Test for Interior Precast Beam-Column Joints using Slag-Based Concrete

Author(s): Han-Se Moon, Hyeon-Jong Hwang, Chang-Soo Kim, Kwang-Won Jo, Jae-Hong Jeong, Chan-Kyu Park, Hong-Gun Park

Publication: Structural Journal

Volume:

Issue:

Appears on pages(s):

Keywords: beam-column joint; cyclic loading test; hook anchorage; precast concrete; seismic performance; slag-based concrete; zero-cement concrete

DOI: 10.14359/51742139

Date: 7/30/2024

Abstract:
To reduce CO₂ emissions of concrete, a slag-based zero-cement concrete (ZC) of high strength (60 MPa [8.70 ksi]) was developed. In the present study, cyclic loading tests were conducted to investigate the seismic performance of full-scale interior precast beam-column joints using the new ZC. One monolithic Portland cement-based normal concrete (NC) beam-column joint and two precast ZC beam-column joints were tested. The test parameters included concrete type, fabrication method, and beam bottom bar anchorage detail. The structural performance, including the strength, deformation capacity, damage mode, and energy dissipation, was evaluated. The test results showed that the structural performance of the precast ZC beam-column joints can be equivalent, or superior, to that of the monolithic NC beam-column joint. Although the reinforcement details of the ZC joints do not satisfy the seismic design requirements of special moment frames in ACI 318-19, the seismic performance of the ZC joints satisfied the requirements of ACI 374.1-05 and AIJ 2002 Guidelines.