Evaluation of Design Compatibility for Lightweight Soundproof Tunnels using Pipe Truss Beams

Abstract : In this paper, the structural characteristics of a lightweight soundproof tunnel to reduce the dead load imposed on the bridge are investigated. Subsequently, the design procedure of soundproof tunnel structures is reviewed and a design practice for the lightweight soundproof tunnel is carried out according to the reviewed procedure. Next, design compatibility for the lightweight soundproof tunnel is verified through a detailed finite element analysis. The result for evaluation of design compatibility shows that the lightweight soundproof tunnel has structural safety in structural members, welding zones and foundation parts. It is also confirmed that serviceability and buckling safety is excellent. Key Words: lightweight soundproof tunnel, lateral sound-absorbing panels, pipe truss beam, design compatibility 주요어: 경량방음터널, 직각 흡음체, 파이프 트러스 빔, 설계 적합성 Corresponding author : Noh, Myung-Hyun POSCO Global R&D Center, Songdogwahak-ro, Yeonsu-gu, Incheon 406-840, Republic of Korea. Tel: +82-32-200-2460, E-mail: mnoh@posco.com Received February 5, 2016 / Revised February 29, 2016 / Accepted March 3, 2016