The Behavior of Special Structures During the Bam Earthquake of 26 December 2003

Document Type : Structural Earthquake Engineering




On 26 December 2003 an earthquake of magnitude Ms= 6.5 with a focal depth of about 8km occurred in southeastern Iran. The earthquake caused intense ground shaking throughout the affected area. Special structures such as on-grade steel oil tanks, elevated tanks, and industrial equipment were damaged during the earthquake. This paper presents the results of an investigation of the behavior of these special structures in Bam. Strong motion characteristics as recorded by accelerograms are discussed, as well as the failure modes of structures and components located within the affected area. An investigation into the response of an electrical transformer was carried out as a case study of a simple system.