1993 Fiscal Year Final Research Report Summary
Stochastic Estimates of Seismic Response and Damage of Building Structures
| Project/Area Number |
04650520
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Building structures/materials
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
SUZUKI Yoshiyuki Kyoto Univ., Disas.Prev.Res.Inst., Assoc.Prof., 防災研究所, 助教授 (50027281)
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| Co-Investigator(Kenkyū-buntansha) |
KITAHARA Akio Kyoto Univ., Disas.Prev.Res.Inst., Instructor., 防災研究所, 助手 (00195273)
FUJIWARA Teizo Kyoto Univ., Disas.Prev.Res.Inst., Prof., 防災研究所, 教授 (10026031)
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| Project Period (FY) |
1992 – 1993
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| Keywords | Stochastic estimation / Seismic response / Hysteretic structure / Seismic damage / Stochastic differential equation |
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| Research Abstract |
In this study an analytical procedure of stochastic estimates is presented for the structural responses and damage states of hysteretic structural systems under intense earthquakes from noisy and partial observations of seismic structural responses. Based on experimental and theoretical results of structural members and frames, hysteretic constitutive laws and damage measures of hysteretic structural systems have been modeled and expressed by nonlinear differential equations. By making use of these differential representations and stochastic seismic excitation models, the basic equations of estimates, namely, the system and observation equations are formulated in the form of the Ito stochastic differential equations. With recourse of appropriate conditional probability density functions given observations, the time-dependent conditional statistics and conditional probability density functions concerning structural seismic damages as well as the responses are determined.
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