This paper describes a novel zero-stress member selecting method for sizing optimization of truss structures. When a sizing optimization method with static constraints is implemented, the member stresses are affected sensitively with changing the variables. However, because some truss members are unaffected by specific loading cases, zero-stress states are experienced by the elements. The zero-stress members could affect the computational cost and time of sizing optimization processes. Feature selection approaches can be then used to eliminate the zero-stress member from the whole variables prior to the process of optimization. Several numerical truss examples are tested using the proposed methods.

Abstract
1. 서론
2. 데이터세트
    2.1 10-bar truss
    2.2 데이터 획득
3. 데이터 정규화
    3.1 입력 및 출력 데이터의 분석 분포
    3.2 정규화
4. 특성선택
    4.1 특성선택 기법
    4.2 랜덤포레스트
    4.3 특성 중요도
    4.4 특성선택 개수
5. 수치해석 예제
6. 결론
References

• 이승혜(세종대학교 건축공학과) | Lee Seunghye (Dept. of Architectural Engineering, Sejong Univ.)
• 이종현(세종대학교 건축공학과) | Lee Jonghyun (Dept. of Architectural Engineering, Sejong Univ.)
• 이기학(세종대학교 건축공학과) | Lee Kihak (Dept. of Architectural Engineering, Sejong Univ.)
• 이재홍(세종대학교 건축공학과) | Lee Jaehong (Dept. of Architectural Engineering, Sejong Univ.) 교신저자