Earthquake always is considered as one of the most terrible disasters and till now it caused so much losses life. So we must secure the buildings and structures as much as possible. Between these, life lines, especially petroleum industry and the related structures to this industry has especial place and needs that such structures be identified and in case of emergency reconstruction or retrofitting be performed. Here we want to study and investigate the steel boiler chimney of water steam unit in one of the Iran refineries which has more than 40 years history by using Abaqus software. In this way the weak points of the chimney will be talked and if need to its reformation according to related regulations, the reformation plan will be suggested and investigated.
