| Title |
Evaluation of Progressive Collapse Resistance Performance in Steel Ordinary Moment Frames with Welded Cover Plated Flange Connections |
| Authors |
이상윤(Lee, Sang-Yun) ; 오종화(Wu, Zong-Hua) ; 노삼영(Noh, Sam-Young) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.12.235 |
| Keywords |
WCPF connection; Progressive collapse; 1-D model; Energy-based approximate analysis; Structural robustness; Sensitivity |
| Abstract |
FEMA 351 outlines the use of welded cover plated flange (WCPF) connections to prevent brittle fracture and enable plastic deformation at
the beam's end in WUF-B connections. This study assesses the progressive collapse resistance of WCPF connections by applying the
alternative path method to a target structure previously examined in the evaluation of WUF-B and RBS connections. An energy-based
approximate analysis, considering the dynamic effects of sudden column loss, was used to evaluate the structure's progressive collapse
resistance in terms of structural robustness and sensitivity. Results were compared with structures featuring WUF-B and RBS connections
analyzed in a prior study. The structure incorporating WCPF connections demonstrated a 33% improvement in structural robustness and 11%
less sensitivity to progressive collapse when one column was removed, compared to the WUF-B and RBS connections in the previous study.
In the scenario of removing two columns, only the structure with WCPF connections exhibited progressive collapse resistance capacity. The
WCPF connection displayed superior progressive collapse resistance capacity compared to WUF-B and RBS connections. |