...M. Utsumi This paper investigates the use of dynamic vibration absorbers as a means to reduce the vibration of a floating roof due to sloshing caused by long-period earthquakes. It is shown that the damping ratio of the primary system caused by the dynamic vibration absorbers increases with rising...

...-of-plane bending may reduce significantly. 25 12 2007 27 05 2009 28 04 2010 28 04 2010 ageing bending earthquake engineering earthquakes failure (mechanical) pipelines vibrations wall thinning piping system shake table test failure modes seismic load...

...Keisuke Minagawa; Satoshi Fujita Background: Since the Hanshin-Awaji Earthquake Disaster, the number of isolated structures has been greatly increased. The natural period of the isolation system is designed around 3 s , because the predominate period of observed seismic waves is usually 0.1 to 1 s...

...Heki Shibata 20 10 2005 24 10 2005 nuclear power stations earthquakes nuclear reactor maintenance failure analysis fission reactor design fission reactor safety seismology nuclear facility regulation This papers deals with the importance of input ground motions...

...Spyros A. Karamanos; Lazaros A. Patkas; Manolis A. Platyrrachos The present paper investigates sloshing effects on the earthquake design of horizontal-cylindrical and spherical industrial vessels. Assuming small-amplitude free-surface elevation, a linearized sloshing problem is obtained, and its...

... ( a ) Elastoplastic damper and ( b ) EPD schematic diagram damping dynamic testing shock absorbers cantilevers pipes finite element analysis earthquakes elastoplasticity The integrity of piping systems in nuclear power plants under earthquake excitation is very essential. In nuclear power...

... of the concrete has been varied from 28 to 43 MPa in the present case study. 24 05 2004 24 06 2005 containers seismology water storage damping shapes (structures) stress analysis earthquakes The safety of a structure is dependant on number of factors, both...

.... BIS , 2000 , “ IS: 456, Indian Standard Code of Practice for Plain and Reinforced Concrete ,” Fourth Revision, Bureau of Indian Standards, New Delhi, India. ducts fission reactor design fission reactor materials fission reactor safety seismology earthquakes stress analysis design...

... values, the proposed procedure can explain the mechanics of the rocking motion of the model tanks used herein. 29 10 2004 02 06 2005 shells (structures) plates (structures) tanks (containers) earthquakes The rocking motion of the unanchored tank has been the subject of both...

...Gerry Slagis 26 02 2004 pressure vessels fission reactor design fission reactor safety earthquakes seismology fission reactor materials nuclear engineering computing This special issue of the ASME Journal of Pressure Vessel Technology is focused on various technical...

...Heki Shibata, Professor Emeritus; Kohei Suzuki, Professor; Masatoshi Ikeda The Seismic Design Code for High Pressure Gas Facilities was established in 1982 in advance of those in other industrial fields, the only exception being that for nuclear power plants. In 1995, Hyogoken Nanbu earthquake...

...Budy D. Notohardjono; James Wilcoski; James B. Gambill This paper presents the design features of an electrical equipment frame structure that can withstand a severe earthquake test profile. Original designs of these structures were optimized to survive shock and shipping vibrations only, since...

...Shigeki Okamura; Satoshi Fujita; Masayoshi Ikenaga After the Hanshin-Awaji Earthquake Disaster, the number of earthquake isolated buildings is increasing. Most of the base isolated buildings or structures are built on laminated rubber bearings in order to give them certain natural periods...

...Makoto Inaba; Masatoshi Ikeda; Nobuyuki Shimizu After the Great Hyogoken-nanbu Earthquake (1995), the Seismic Design Code for High-Pressure Gas Facilities of Japan was amended. This amended code requires two-step seismic assessments, that is, the evaluation of the Level 1 Required Seismic...

... isolated buildings against major earthquake motions newly introduced to the Building Code of Japan in October, 2000. The evaluation procedures apply the equivalent single-degree-of-freedom (ESDOF) system, equivalent linearization and response spectrum analysis. The basic concept of seismic design spectra...

...) systems with non-classical damping. In this program, four benchmark models of coupled building-piping/equipment systems with different damping characteristics were developed and analyzed by BNL for a suite of earthquakes. The BNL analysis was carried out by the Wilson-θ time domain integration method...

... a large-scale shake table which verified that the ties acted as energy-absorbing devices against severe earthquakes. Since recent boiler structures are designed based on dynamic response analysis considering the boiler-structure interaction and the effect of energy dissipation of the ties, it is necessary...

... conditions even under destructive earthquakes, it is important to predict the dynamic behavior and failure modes of degraded piping systems. However, there are very few studies on dynamic behavior of degraded piping systems under seismic events 1 2 , though a lot of experimental or analytical studies have...

... of the structures during severe earthquake by using conventional methods and equipment, because the three-dimensional measurement of larger dynamic displacement in excess of elastic region of the structure will be the key to a solution and cannot be obtained by any of the vibration pick-ups such as displacement...

...B. Chatterjee; S. K. Gupta; H. S. Kushwaha; V. Venkat Raj In nuclear power plants, the primary heat transport system (PHTS) is designed according to ASME Section 3 Division 1. The PHTS together with Primary Coolant Pumps (PCPs) is designed so that the integrity under safe shutdown earthquake (SSE...