Evaluation of Evacuation Possibility During Earthquake based on Seismic Response Analysis Model of Human Body Considering Walking and Falling

• Published in: Journal of physics. Conference series Vol. 2647; no. 13; pp. 132003 - 132011
• Main Authors: Sakuma, Haruki, Hida, Takenori
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.06.2024
• Subjects: Control systems; Damage assessment; Earthquake construction; Earthquake damage; Earthquakes; Evacuation; Falling; Feedback control; Head movement; Human behavior; Human body; Human motion; Human response; Human subjects; Injury analysis; Seismic response; Shake table tests; Sine waves; Walking
• DOI: 10.1088/1742-6596/2647/13/132003
• ISSN: 1742-6588

In the past massive earthquakes, many people suffered severe damage. Among them, not a few people suffered fall-induced injury because of evacuation actions during the shaking. Therefore, it is important to estimate the human response to shaking and the possibility of evacuation to evaluate human injury during an earthquake. Considering these background, this study proposes the evaluation method of fall and walking difficulty during an earthquake considering human behavior by constructing the seismic response analysis model of human body. First, the shaking table tests with human subject were conducted to observe the human behavior under strong motion excitation. Then the human body model considering walking and falling was developed based on a cart-type double inverted pendulum with feedback control system. In order to set appropriate feedback gains of the control system, the displacement and velocity of head of the human body model was compared to those of the human subject of the shaking table test. Then, the behavior and mechanism of falling of the human due to walking during shaking was investigated by inputting the strong motion record, which observed during 1995 Hyogo-ken Nanbu earthquake, to the human body model. Next, sinusoidal waves of various amplitudes and periods were input to the human body model to clarify the relationship between the vibration characteristics of the input motion and the response of the human body. Then, the evaluation method for evacuation possibility during an earthquake was proposed. Finally, the validity of the proposed method was investigated by comparing the behavior of the human body excited by sinusoidal wave with that excited by an earthquake shaking.