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932 results on '"Kishiki, Shoichi"'

63. MODAL ANALYSIS OF SEISMIC FORCES FOR LIGHT-WEIGHT BENDING BEAM FIXED AT ONE END AND PIN-SUPPORTED AT THE OTHER IN A MULTISTORY BUILDING

Author

Ishihara, Tadashi, Oki, Yusuke, and Kishiki, Shoichi

Subjects
慣性力, Inertial force, Nonstructural components, Multiple support excitation, 多点入力, 強制変形, 非構造部材, Relative displacement demand
Abstract

In our previous studies, seismic forces for secondary systems (SS) such as nonstructural components are investigated using light-weight bending-beam models with boundary condition (BC) of both pin-supported ends or of both fixed ends. In this paper, seismic forces for SS modeled as beams with another BC of one fixed end and the other pin-supported end are examined. Structural frames and SS are assumed to be linear. A modal analysis method for them is derived. The results with different BCs are compared and clarify the effect of BCs on seismic forces for SS.

Published
2022

69. Application of the Deformation Behavior Evaluation Method for the Quick Inspection of U-Shaped Steel Dampers.

Author

Zheng, Haowen and Kishiki, Shoichi

Subjects
*BEHAVIORAL assessment, *EVALUATION methodology, *STEEL, *CYCLIC loads, *DYNAMIC loads
Abstract

Practical cumulative damage evaluation methods are essential for commercializing metallic dampers, such as U-shaped steel dampers. The high dependence on numerical simulations, such as time-history analysis, significantly restricts the use of the previously reported cumulative damage evaluation method in the quick inspection of U-shaped steel dampers. This makes simplifying and efficiently certifying the estimated value of cumulative damage difficult. Therefore, the precision verification approach of the previously reported damage evaluation method and quick inspection method are combined in this study based on the change in the shape of the dampers caused by dynamic cyclic loading. [ABSTRACT FROM AUTHOR]

Published
2023
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70. Cyclic Behaviors of SHS Columns in Low Cycle Fatigue Tests.

Author

Dong, Yang, Ishida, Takanori, Kishiki, Shoichi, Yamada, Satoshi, and Hasegawa, Takashi

Subjects
FATIGUE testing machines, FATIGUE life, CYCLIC loads, IRON & steel columns, CYCLIC fatigue, FLANGES, LATERAL loads
Abstract

The damage caused by small inelastic loadings cannot be neglected when the number of cycles is large. Previous research has mainly focused on the low cycle fatigue (LCF) behaviors of beam-to-column connections, ignoring those of columns. Here, cyclic loading tests were conducted on 22 cold-roll-formed square hollow section columns under multiple small-amplitude loadings. All the specimens failed owing to flange fracture. The effects of the axial force ratio, shear span ratio, and loading amplitude on the LCF behaviors were investigated. Fatigue life prediction methods were developed, and two methods for predicting the lateral resistance deterioration of the specimens were proposed. [ABSTRACT FROM AUTHOR]

Published
2023
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