scholarly journals A BASIC STUDY ON DYNAMIC PROPERTY AND SEISMIC RESPONSE OF TIMBER STRUCTURE WITH FLEXIBLE FLOOR AND UNI-AXIAL STIFFNESS ECCENTRICITY

2011 ◽  
Vol 76 (663) ◽  
pp. 959-968
Author(s):  
Yoshihiro YAMAZAKI ◽  
Kazuhiko KASAI ◽  
Hiroyasu SAKATA
Keyword(s):  
Seismic Response ◽  
Dynamic Property ◽  
Timber Structure ◽  
Axial Stiffness ◽  
Basic Study

A Development of the Visco-Elastic Damper for Timber Structure and a Suggestion of the Technological Design Assistance System

2013 ◽  
Vol 778 ◽  
pp. 714-721
Author(s):  
Katsuhiko Kohara ◽  
Takeshi Nomura ◽  
Kazuyoshi Koumoto
Keyword(s):  
Seismic Response ◽  
Elastic Body ◽  
Structural Model ◽  
Time History ◽  
Timber Structure ◽  
Response Analysis ◽  
Frame Design ◽  
Timber Frame ◽  
Loading Tests ◽  
Controlled Structure

Our research team developed a brace type and an angle brace type of the visco-elastic damper on seismic-response controlled structure for timber structure. We performed various dependence evaluations by the materials examination of the styrene olefin-based visco-elastic body which we developed newly. We made a structural model using the performance that loading tests in timber frame. We inspected the validity of the structural model. In addition, we built a technical support system for damper setting by the time history response analysis so that a general design architect was easy to use the damper. We could express dynamics properties of visco-elastic body properties by Voigt model, and the structural model almost accorded with an examination property value. We made a structural model of the whole frame system by Kb of installation rigidity obtained from loading tests in timber frame. Because a design level almost accorded with experimental value, the validity of the frame design on seismic-response controlled structure in consideration of the dependence (distortion, frequency, temperature) of the visco-elastic body was confirmed. This visco-elastic damper on seismic-response controlled structure acquired minister authorization of Ministry of Land, Infrastructure and Transport. In addition, this damper acquired the certification of the Japan Building Disaster Prevention Association.

Seismic Response Analysis of Liaocheng Guangyue Tower

2015 ◽  
Vol 744-746 ◽  
pp. 911-914
Author(s):  
Zhao Bo Meng ◽  
Guan Dong Qiao ◽  
Jie Jin
Keyword(s):  
Seismic Response ◽  
Soil Structure ◽  
Natural Frequencies ◽  
Timber Structure ◽  
Soil Structure Interaction ◽  
Response Analysis ◽  
Actual Situation ◽  
Seismic Response Analysis ◽  
Structure Interaction ◽  
Rare Earthquake

This paper establishes three models using ANSYS, which were timber structure of Guangyue Tower, timber structure-tower base and timber structure-tower base-foundation. The first 3 natural frequencies of timber structure respectively were 0.8524Hz、1.1273 Hz and 1.7426 Hz through modal analysis, which were compared with calculations from code. Lanzhou Wave was chosen to analyze the seismic response of Guangyue Tower, and the amplitudes were adjusted to 55gal and 310gal respectively according to the frequent earthquake and rare earthquake, which were inputted to the above models. As can be seen from the calculations, the maximum displacements of the three models were in the top nodes, and tower base had a greater impact on vibration of timber structure, which could not be ignored in seismic response analysis; considering soil-structure interaction in seismic response analysis could better reflect the actual situation of Guangyue Tower.

G1010401 Basic Study on Model Reduction for Seismic Response Behavior of High-Speed-Moving Vehicle

2014 ◽  
Vol 2014 (0) ◽  
pp. _G1010401--_G1010401-
Author(s):  
Atsuhiko SHINTANI ◽  
Yuto FUJII ◽  
Tomohiro ITO ◽  
Chihiro NAKAGAWA
Keyword(s):  
Model Reduction ◽  
Seismic Response ◽  
High Speed ◽  
Response Behavior ◽  
Basic Study ◽  
Moving Vehicle

scholarly journals Parametric Study on the Seismic Response of Steel-Framed Buildings with Self-Centering Tension-Only Braces

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Pei Chi ◽  
Wenlong Tian ◽  
Tong Guo ◽  
Dafu Cao ◽  
Jun Dong
Keyword(s):  
Seismic Response ◽  
Parametric Study ◽  
Stiffness Degradation ◽  
Axial Stiffness ◽  
Seismic Action ◽  
High Rise ◽  
Degradation Factor ◽  
Tunable Structure ◽  
Residual Deformations ◽  
Lateral Behavior

Self-centering bracing systems, by which residual deformations of structures after earthquakes can be minimized, are considered effective solutions to achieve seismic resilience. In this paper, a parametric study on the seismic response of intermediate and high-rise steel-framed buildings with novel self-centering tension-only braces (SC-TOBs) is numerically conducted. Three key parameters, the stiffness degradation factor, the activation strain, and the initial axial stiffness of the SC-TOBs, are investigated to explore the design space for the SC-TOB frames (SC-TOBFs) because of their unique tunability compared with traditional bracing systems. Identical steel frames equipped with buckling restrained braces (BRBs) are also designed and examined for comparison purposes. The results indicate that increasing the stiffness degradation factor can improve the second stiffness of SC-TOBFs and successfully make the distribution of interstory drifts more uniform; an increase in the activation strain leads to a larger activation deformation of SC-TOBFs, but it has a very limited effect on the interstory drifts; increasing the initial axial stiffness appropriately is beneficial to reduce the interstory drifts of the low stories. The lateral behavior of SC-TOBFs is comparable to that of BRB frames when a lower activation strain and a higher initial axial stiffness are selected. Furthermore, when a higher stiffness degradation factor and a lower initial axial stiffness are selected simultaneously, the seismic action on SC-TOBFs can be effectively reduced, and a relatively uniform distribution over the building height can be obtained. The SC-TOBFs are considered to be a type of performance-tunable structure, and tuning can be achieved by varying a frame’s adjustable parameters.

Evaluation of the Seismic Response of an Innovative Hybrid Steel‐Timber Structure

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 1864-1873
Author(s):  
Ahmed Mowafy ◽  
Ali Imanpour ◽  
Ying Hei Chui
Keyword(s):  
Seismic Response ◽  
Timber Structure
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