Events Calendar

Astani Department CEE Ph.D. Seminar

Speaker: MINA SUGINO, Graduate School of Engineering, Kyoto University, Japan

Talk Title: Evaluation of dynamic behavior and seismic capacity of

Abstract: Many old wooden buildings collapsed in Kobe earthquake in 1995 or recent inland shallow earthquakes. In these earthquakes, “pulse-like ground motions” have been observed which caused severe damage to buildings. Meanwhile, there are many traditional wooden buildings forming a historical townscape in Japan. However, little is known about structural properties of traditional wooden buildings affect the response of the buildings against pulse-like ground motion and few buildings are conducted seismic capacity evaluation.

The objective of my research is to evaluate dynamic behavior of traditional wooden buildings and establish simplified maximum response evaluation method against pulse-like ground motions.

To understand which parameters of pulse-like ground motion affect the response of buildings dominantly, I have proposed a procedure to characterize pulse-like ground motions to simplified
waves as shown in Fig.1 consisting of only simple parameter; duration time, predominant period and maximum velocity.

Shaking table test of traditional wooden frames has been conducted to confirm the dynamic behavior of traditional wooden frames against pulse-like ground motion. From shaking table test
results, it is shown that equivalent natural period which is calculated from response acceleration can be useful to evaluate maximum displacement of wood frame as shown in Fig.2.

To establish simplified maximum response evaluation method, I have suggested a regression equation of dynamic deformation properties of traditional wooden buildings what equivalent natural frequency varies according to maximum deformation angle as shown in Fig.3 from seismic observation, shaking table test and static lateral loading test. Maximum response against expected pulse-like ground motion is easily evaluated from natural frequency which is obtained from microtremor measurement and dynamic deformation properties of traditional wooden buildings applying capacity spectrum method.

Location: Seeley G. Mudd Building (SGM) - 101

Audiences: Everyone Is Invited

Contact: Evangeline Reyes