Kajian Analitik Pengaruh Beban Termal Terhadap Stabilitas Tiang Pipa Baja

Abstract

. Steel pipes are found at almost industrial structures, especially in refinery plant. More and more often, steel pipes have to be designed to operate at higher temperature. Design temperature until 8000C which we find at refinery plant is not uncommon. This paper deals with particular case of pillar of steel pipe which is simply supported and operates at elevated and distributed temperature until 8000C. When the design of temperature is very high, it becomes increasingly difficult to meet the current design criterion. Initial imperfection like residual stress and out-of-straightness is covered in this simulation. In this simulation, initial imperfect column condition such as residual stress, out-of-straightness are considerated as well. Stability becomes to be an important consideration. Numerical method based on finite element is used to simulate this case. The result of the analysis shows that the stability of steel pipe indicated by first yield temperature and collapse temperature are determined especially by dimension of steel pipe, out-of-straightness, residual stress, as well as thermal load distribution. The minimum antibuckle axial force increases with the thermal load, but the opposite condition for the maximum antibuckle axial force