This research investigates the effects of trench installation methods with expanded polystyrene (EPS) geofoam on the behavior of buried corrugated steel arch structure. A universal finite element analysis program, ABAQUS, was used to model and analyze the structure. For this study, the S275 corrugated steel with a profile of 152x51mm and the arch has fixed boundary condition. The structure was analyzed for three different configurations, namely; without EPS geofoam, imperfect trench installation (ITI), and embedded trench installation (ETI). ITI and ETI cases were further divided depending on the width and height of EPS geofoam. The width of EPS geofoam varies from the span of the arch up to a 30% increase of the span of the arch while its height varies from the rise of the arch upto 100% increase of the rise of the arch. The results from the finite element analysis revealed that the ETI reduced the wall stresses by at least 53.95%. It is recommended to conduct further study regarding ETI to validate the results and to further improved the design criteria of buried corrugated steel arch as it is expected to bring about cost reduction and stability for buried structures.

ABSTRACT
 1. Introduction
 2. Finite Element Model
 3. Data and Results
 4. Conclusion and Recommendations
 References

• 랄프(Dept. of Civil Engineering ․ Sangmyung University) | Santos Ralph Raymond
• 세인(Dept. of Civil Engineering ․ Sangmyung University) | Alolod Shane
• 마벨(Dept. of Civil Engineering ․ Sangmyung University) | Catuira Mabel
• 강준석(Dept. of Landscape Architecture and Rural Systems Engineering ․ Seoul National University) | Kang Jun-S
• 박종섭(Dept. of Civil Engineering ․ Sangmyung University) | Park Jong-Sup