The design composition elements and the mechanical behavior of trusses have been investigated for Pratt trusses. As a result, it was determined that the design composition elements of the trusses consist of the composition of webs, the distance between joints, the chords profile, the depth of the truss, and the double chord composition. In addition, by analyzing models with a variation of elements, comprehensive features of structural behavior have been presented for variations of design of Pratt trusses. This is to provide more effective and useful design information on truss structure in the architectural and structural planning stage.

 Abstract  1. 서 론  2. 트러스의 구조원리 및 유형  3. 트러스구조의 디자인 구성요소   3.1 웨브재 구성 변화(Composition of Webs)   3.2 절점간 거리(Distance of Joints)   3.3 상하현재 입면형(Chords Profile)   3.4 깊이변화(Depth)   3.5 현재의 2중 배열(Double Chords)  4. 구성요소 변화에 따른 프랫트러스의 역학적 거동   4.1 절점간 거리 변화 분석

• 박찬수(공학박사, 충북대학교 건축공학과 교수) | Park, Chan-Soo
• 이주나( 서울시립대학교 건축학부 객원교수) | 이주나