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Mirzabozorg, Hasan,Ghaemian, Mohsen,Roohezamin, Amirhossein Techno-Press 2019 Structural monitoring and maintenance Vol.6 No.2
Present study concerns the safety evaluation of SefidRud dam's block No. 18 regarding probable crack propagation in the foundation gallery under a MCE record. Accordingly, a 3D finite element model of the block in companion with the reservoir and the foundation is modeled. All the associated thermal and structural parameters are derived via calibration with the records of thermometers and pendulums installed inside the dam body. The origination of the cracks and their whereabouts are determined by primary thermal and static analyses and through a linear dynamic analysis the potential failure zone and their extent and level are studied. The foundation gallery is the most probable zone among the other intensive tensile stress area to compromise the dam stability. Therefore, the nonlinear analysis of this risky region is inevitable. The results depict the permissible expansion of the cracks inside the gallery even under another future earthquake in MCE level. As a consequence, the general dam performance is assessed safe in spite of the seepage flow rate growth from the gallery fractures.
Infective Left Atrial Dissecting Flap after Cardiac Surgery
Maryam Nabati,Sasan Tabiban,Ali Ghaemian,Babak Bagheri,Mojtaba Shokri 한국심초음파학회 2014 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.22 No.3
Left atrial dissection (LatD), defined as the forced separation of the left atrial (LA) wall layers by blood, is a rare and severe complicationof cardiac surgery. It is most frequently associated with atrioventricular junction injuries. We report a case of infected LatDafter coronary artery bypass graft, mitral valve replacement, aortic valve replacement and ascending aortic root replacement. Thepatient was presented with septicemia and disseminated intravascular coagulation. To the best of our knowledge, this is the firstcase report of LA dissecting flap concomitant with attached infective vegetations identified by transesophageal echocardiography.