Study on optimum aseismic design of complex structure system focusing on damping effect
- Tokyo Metropolitan Univ., Hachioji, Tokyo (Japan). Dept. of Mechanical Engineering
Optimum design technique for the purpose of aseismic design of complex plant structures such as piping and boiler structures is proposed. Particular attention is focused on the evaluation of the optimum damping and stiffness of the structures and components. Pseudo least square algorithm is introduced to determine the optimum design parameters. Under the requirement of certain allowable maximum response to a given earthquake excitation, optimum stiffness and damping values of the structure can be simultaneously calculated by this proposed method. The applicability of the method is demonstrated through three structural models; (1) linear multi-storied building model in which stiffness and damping constant of each floor are optimized; (2) nonlinear multi-storied building model having the isolated floor in which hysteretic energy absorber of the isolator is optimized; (3) combined boiler-supporting structure model connected by the inelastic seismic ties with each other is optimized. In this model, optimum values of damping characteristic of the seismic ties are evaluated. This work is particularly important for the aseismic design of complex plant structures like integrated boiler-supporting structure in thermal power plant and piping-containment vessel structure in nuclear power plant.
- OSTI ID:
- 170385
- Report Number(s):
- CONF-950740--; ISBN 0-7918-1343-6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
ALGORITHMS
BOILERS
BUILDING CODES
DAMPING
DEGREES OF FREEDOM
EARTHQUAKES
FOSSIL-FUEL POWER PLANTS
GROUND MOTION
JAPAN
MATHEMATICAL MODELS
MECHANICAL VIBRATIONS
NUCLEAR POWER PLANTS
OPTIMIZATION
PIPES
SEISMIC ISOLATION
SHOCK ABSORBERS
SUPPORTS