Dynamic Response of Building Structures

Numbering Code G-ENG04 5B046 LJ74 Year/Term 2021 ・ First semester
Number of Credits 2 Course Type Lecture
Target Year Target Student
Language Japanese Day/Period Wed.1
Instructor name HAYASHI YASUHIRO (Graduate School of Engineering Professor)
SUGINO MINA (Graduate School of Engineering Associate Professor)
NISHIJIMA KAZUYOSHI (Disaster Prevention Research Institute Associate Professor)
Outline and Purpose of the Course In designing earthquake-proof structures, it is important to consider the nonlinearity and coupled behavior of the construction site ground as well as the structure, and there is a need for more practical design plans. In this course, we will first study major theories related to structure earthquake response evaluation, followed by analytical methods and earthquake-proof design methods involving dynamic interactive factors related to the ground and the coupling of the structure.
Course Goals To enable accurate evaluation of the behavior of buildings in earthquakes, as well as accurate evaluation of earthquake resistance.
Schedule and Contents Basics of frequency analysis and time-history analysis (4 classes)
Based on the example of earthquake resistance evaluation in single degree of freedom systems, we will explain frequency analysis and time-history analysis in an integrated fashion, explaining the characteristics of both as well as points to bear in mind in analysis from a practical point of view.

Structure response analysis and damping evaluation (4 classes)
We will explain an evaluation method involving the damping ratio of the structure based on experiments and observations. Also, the damping evaluation method will be explained as a means of creating an earthquake response analysis model of the structure.

Dynamic interaction between the structure and the ground (2 classes)
We will discuss the relationship between the characteristics of soil springs and foundation-input-motion as expressions of dynamic interaction on the one hand, and building response on the other. Next, we will discuss the influence of differences in the ground and the foundation type upon interactive characteristics. Finally, we will explain practical analysis methods, bearing in mind dynamic interaction.

Random vibration theory (5 classes)
We will discuss the basics of random vibration theory, which evaluates the response of the structure as a stochastic quantity. In particular, we will explain linear stationary random response, non-stationary random response, and first passage theory.
Evaluation Methods and Policy Grading is based on both attendance and reports.
Course Requirements Basic knowledge of vibration theory (linear response in single degree of freedom systems and multiple degree of freedom systems) is required.
Study outside of Class (preparation and review) Review contents of Earthquake Resistant Structures which is a course of undergraduate school before taking classes. Review theories explained in classes about our hour every time.
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