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JNC TN9400 2000-060, 168 Pages, 2000/05
JNC-TN9400-2000-060.pdf:4.09MB
Optimal vertical isolation characteristics were studied for the structural concept of vertical seismic isolation system, which uses a common deck and a set of large coned dish springs. Four kinds of earthquake wave and three kinds of artificial seismic wave were used. The earthquake response analysis of a base isolated building was carried out considering some ground conditions and some vertical vibration characteristics of the building isolator. Floor response and acceleration time history at the vertical isolation level were arranged. Using the acceleration time history as a seismic input, the earthquake response analysis of the vertical isolation system according to single degree of freedom model was carried out. Linear analysis and non-linear analysis were made. ln the linear analysis, vertical isolation frequency was examined within 0.8 to 2.5 Hz, and damping ratio was examined within 2 to 60%. ln the non-linear analysis, it was examined within vertical isolation frequency 0.5 to 5Hz, which depended only on the rigidity of the coned disk spring, rigidity ratio of the damping devise 1 to 20 and yield seismic intensity of the damping devise 0.01 to 0.2. As the optimal vertical isolation characteristics of the system, the criterion of largest relative displacement, maximum acceleration and maximum value of the floor response acceleration between 5 to 12Hz was set, the combination region of the appropriate parameter were examined. ln case of largest relative displacement 50mm, acceleration response magnification of 0.75, floor response magnification of 0.33 were used as a criterion, from the result of the linear analysis, vertical frequency was set at 0.8 to l.2 Hz, and by combining the damping ratio over 20 %, it was proven that appropriate vertical isolation characteristics were obtained. The result of the non-linear analysis showed that the combination of the coned disk spring of vertical frequency 0.8 to 1.0 Hz and the damping element of rigidity ...
Tsukimori, Kazuyuki;
PNC TN9460 95-004, 211 Pages, 1995/12
This report describes the explanation on the new options and extensions of "FINAS" (FInite Element Nonlinear Structural Analysis System) updated version 13.0 (developed from April 1993 to July 1995). The items are as follows. (1)3 kinds of spring-supported base elements (2)4-node quadrilateral plane strain element (3)Off-set function utilized with 3-dimensional beam element (4)Definition of centrifugal force by angular velocity and pivot (5)2-node heat flow element for thermal hydraulic analysis (6)Addition of CQC method and ABS method as mode superposition method for spectrum response analysis (7)Addition of logarithmic interpolation as spectrum data interpolation method for spectrum response analysis (8)*Multi-point input function of spectrum data in spectrum response analysis (9)Output function of maximum reaction force in spectrum response analysis (10)Output function of member forces for shell element and bar element (11)Plotting function of normal stresses and shear stresses in the vectorial plot charts (12)Plotting function of user-defined state variables in the analysis by an arbitrary constitutive equation (13)**Scaling function in X-Y plane plotting function (14)Improvement of calculation efficiency in surface contact analysis (15)Addition of Sloan's argorithmin in renumber function (16)Calculation function of all eigenvalues in the analysis of structure system (17)Extension of the limit of maximum degrees of freedom (up to 4,000,000) (18)**Provision of user's subroutine for the arbitrary constitutive equation (19)**Provision of user's subroutine for the arbitrary element (20)Extension of two-surface cyclic plasticity model by introducing temperature dependency (21)Revision of execusion commands and monitering function of statistical information in UNIX environment (22)Automatic verification system in UNIX environment (23)Guide of utility programs supporting the development of FINAS (EWS version) The properties of new functions were verified ...
Matsukawa, Makoto; *; Horiike, Hiroshi; Ninomiya, Hiromasa; Neyatani, Yuzuru; Ando, Toshiro; *
Nihon Genshiryoku Gakkai-Shi, 35(6), p.561 - 573, 1993/06
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
