scholarly journals FUNDAMENTAL STUDY ON THE DEVELOPMENT OF SEISMIC DESIGN BASED ON ENERGY CONCEPT : Part 2 Strength and cyclic deterioration capacity required to control maximum response displacement

1998 ◽  
Vol 63 (514) ◽  
pp. 169-176
Author(s):  
Hideyuki KINUGASA ◽  
Setsurou NOMURA
Keyword(s):  
Seismic Design ◽  
Maximum Response ◽  
Fundamental Study ◽  
Energy Concept

Fundamental Study on Energy Necessary for Tensile Failure

2016 ◽  
Author(s):  
Keisuke Minagawa ◽  
Satoshi Fujita
Keyword(s):  
Fatigue Failure ◽  
Seismic Design ◽  
Tensile Tests ◽  
Cumulative Damage ◽  
Tensile Failure ◽  
Seismic Events ◽  
Fundamental Study ◽  
Long Time ◽  
The Relationship

Although, a part of damage of mechanical structures by actual seismic events is caused by cumulative damage, their seismic design is generally carried out by using momentary force or stress, because force and stress are calculated easily. Therefore, damage indicating parameters that can evaluate cumulative damage is necessary, and authors have focused on energy as the parameter. The energy can evaluate fatigue failure because the energy is derived from an integral of a product of force and deformation. In our previous paper, vibration and loading experiments were conducted, and the energy necessary for fatigue failure was reported. However the processes to clarify the energy necessary for failure by fatigue experiments take a long time. The processes will be shortened if the energy is clarified by tensile tests. This paper deals with the energy necessary for tensile failure. In this paper, tensile tests were carried out, and energy necessary for tensile failure was derived. The tensile tests were conducted with various tensile speeds. As a result, more energy is needed when tensile speed is slow. This relationship is same as the relationship confirmed by vibration and loading experiments in our previous papers.

Method for Estimating Maximum Response for Seismic Design of Multiple Supported Elastic-Plastic Piping Systems

2015 ◽  
Author(s):  
Akira Sone ◽  
Tomoyuki Matsuda ◽  
Arata Masuda
Keyword(s):  
Nonlinear System ◽  
Seismic Design ◽  
Maximum Response ◽  
Response Analysis ◽  
Simple Method ◽  
Plastic Characteristic ◽  
Nonlinear Properties ◽  
Input System ◽  
Piping Systems ◽  
The One

This study describes a simple method to estimate the maximum response in the seismic response analysis of multi-input nonlinear system. There are many studies on the response analysis of a system having nonlinear properties, such as elasto-plastic characteristic, but they are intended for the one input system because they cannot be applied to multi-input system. On the other hand, a simple method for estimating the multi-input response analysis can also be proposed, which is applied to a linear system, but they cannot be applied to a nonlinear system. However, the importance of seismic design in consideration of both nonlinear and multi-input problems has been increasing in recent years. Therefore, we propose a simple method for estimating the maximum response of multi-input system with elasto-plastic characteristic in the present study.

scholarly journals Fundamental study on evaluation of damage of steel piers with box cross-section based on energy concept.

1987 ◽  
pp. 429-437
Author(s):  
Kiyoshi HIRAO ◽  
Tsutomu SAWADA ◽  
Yoshifumi NARIYUKI ◽  
Syuji SASADA
Keyword(s):  
Cross Section ◽  
Fundamental Study ◽  
Energy Concept

Researches on the Structural Influencing Coefficient of Steel Frames under Different Sites Based on the Energy Concept

2012 ◽  
Vol 226-228 ◽  
pp. 1000-1004
Author(s):  
Hui Juan Jia ◽  
Hang Dai ◽  
Ruo Quan He
Keyword(s):  
Seismic Design ◽  
Seismic Waves ◽  
Steel Frames ◽  
Time History ◽  
Seismic Action ◽  
Energy Concept ◽  
Influence Coefficients ◽  
History Analysis ◽  
Development Direction ◽  
Dynamic Time

The structure influencing coefficients reflect discount rate on horizontal seismic action of different structure categories. In general, the structure influence coefficients are related with the ductility level and overstrength of the structure. According to Code for seismic design of buildings (GB50011-2008), four models of three story-steel frames are designed for 4 types of site. Dynamic time-history analysis is carried out to study the models with records of seismic waves. The ductility level, the over-strength and Structural Influencing Coefficient are derived by the energy concept in the different sites condition. Structural Influencing Coefficient based on the energy concept is a new attempt. Method of the energy concept and design of structure will become the important development direction to improve the traditional seismic design.

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