This paper is to investigate the micro-behavior of the double-span beams with WUF-W seismic connection under combined axial tension and moment and to propose the rational rotational capacity of it for progressive collapse-resistant analysis and design addressing the stress and strain transfer mechanism. To this end, the behavior of the double-span beams under the column missing event is first investigated using the advanced nonlinear finite element analysis. The characteristics of fracture indices of double-span beams with WUF-W connection under combined axial tension and flexural moment are addressed and then proposed the rational rotational capacity as the basic datum for the progressive collapse-resistant design and analysis. The distribution of fracture indices related to stress and strain for the double-span beams is investigated based on a material and geometric nonlinear finite element analysis. Furthermore, the micro-behavior for earthquake and progressive collapse is explicitly different.

A B S T R A C T
 1. 서 론
 2. 수치해석 모델링 및 파괴지수
  2.1 수치해석 모델링
  2.2 파괴지수의 정의
 3. 기중제거 시나리오하에서 축인장력과 휨모멘트조합력을 받는 WUF-W 접합부의 거동
  3.1 접합부의 응력 및 변형도 양상
  3.2 파괴지수 분석
 4. 결 론
 REFERENCES

• 김선웅(영산대학교 스마트시티공학부 부교수) | Kim Seonwoong (Associate Professor, Department of Smart City Engineering, Youngsan University) Corresponding author