2001 Fiscal Year Final Research Report Summary
Development of Experimental Systems for Simulation of Complete Failures of Steel Structures Subjected to Earthquake Loading
| Project/Area Number |
11555150
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Building structures/materials
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
NAKASHIMA Masayoshi Disaster Prevention Research Institute, KYOTO UNIVERSITY, Prof., 防災研究所, 教授 (00207771)
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| Co-Investigator(Kenkyū-buntansha) |
IGARASHI Hideichi Riken Co., Ltd., Product Manager (Engineer), 開発課長(研究職)
SUITA Keiichiro Disaster Prevention Research Institute, KYOTO UNIVERSITY, Assoc. Prof., 防災研究所, 助教授 (70206374)
INOUE Kazuo Graduate School of Engineering, KYOTO UNIVERSITY, Prof., 大学院・工学研究科, 教授 (40029294)
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| Project Period (FY) |
1999 – 2001
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| Keywords | Complete Failure / Damage Evaluation / Structural Testing / On-Line Control Test |
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| Research Abstract |
This study focuses on development of experimental techniques for the simulation of complete failures of structures subjected to earthquake loading. An experimental system that consists of very large stroke loading jacks, high resolution digital displacement transducers, and on-line digital computer control was developed. Using the system developed, tests were conducted for the simulation of complete failures of steel beams and columns. Here, complete failure was defined such that the member was fractured and separated completely and/or the member loses the capacity of sustaining gravity load. The major findings obtained from the tests are as follows.
(1) Strong geometrical nonlinearity changed the mode of beam resistance from flexure to axial elongation/contraction.
(2) This change of mode generated additional resistance even after the beam sustained significant damage.
(3) Complete failure of steel columns was governed by the growth of cracks and succeeding fractures of the section.
(4) A certain amount of axial load retarded the initiation and growth of cracks, which assist the increase of column capacity to complete failure. Numerical analysis using the finite element method was performed to simulate the experimental results, and it was found that the analysis is effective even in the regime of strong geometrical nonlinearity but fails to simulate the experimental behavior once the member topology is altered significantly.
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Research Products
(12 results)
