| 種別 | paper |
| 主題 | Identification of Structural Characteristics of Frame Ele-ments |
| 副題 | |
| 筆頭著者 | Andres W.C. ORETA（Department of Civil Engilaeering, Nogoya University） |
| 連名者1 | Tada-aki TANABE（Department of Civil Engilaeering, Nogoya University） |
| 連名者2 | |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 15 |
| 号 | 2 |
| 先頭ページ | 1309 |
| 末尾ページ | 1314 |
| 年度 | 1993 |
| 要旨 | INTRODUCTION The application of system identification and parameter estimation to real structures is difficult since a realistic model requires that the structure must be represented by many degrees-of-freedom (DOFS).The computation time required for convergence increases drastically with the number of DOFS and problems on divergence are usually encoun-tered.For these reasons,studies applying the system identification problem to only a small portion of a structure by using substructuring so as to reduce the system under consideration have started to be considered by some researchers.The identification approach proposed recently by the authors was termed as ゛localized identification" This approach is reasonable and practical since the analysis can be concentrated at a local and critical part of a structure. As an extension and improvement of the localized identification approach of the pre-vious study, an application to a plane frame is now considered. Unlike in the previous formulation wherein the physical characteristics of the structure are indirectly deter-mined from the identified elements of the stiffness and damping matrices, the present approach directly identifies the structural characteristics of the structural elements. In this study, the physical characteristics of a frame element such as the axial rigidity (EA), flexural rigidity (EI) and damping coefficients are directly identified. The present local-ized identification uses a state equation derived from the equation of motion of a frame element and the extended Kalman filter with weighted global iteration (EK-WGI) is al-plied to estimate the structural characteristics of a frame element.Numerical simulation studies were carried out on a two-story plane frame where the structural characteristics of a frame element were identified. CONCLUSION An application of the localized identification was conducted on a plane frame to identify the structural characteristics of a frame element. In the present localized identi-fication,the physical characteristics of a frame element such as the axial rigidity (EA),flexural rigidity (EI) and damping coefficients are directly estimated using EK-WGI.Numerical simulation studies were carried out on a two-story plane frame wherein the structural characteristics of a frame element were reasonably identified.This notewor-thy result necessitates that more comprehensive studies and applications of the localized identification approach on other structures be conducted to verify its capabilities and usefulness . |
| PDFファイル名 | 015-01-2221.pdf |