Influence of PGV and response spectra on human walking states in simulated earthquake scenarios

Abstract

Scenario-based disaster prevention, preparedness, and response are developing trends in contingency management. Human walking states in simulated scenarios are studied in this work on the Intelligent Seismic Scenario Experience vibration table. The vibration table adopts a comprehensive method that considers the seismic characteristics, building structure, and dynamic performance of the equipment to ensure the real experience of the human body in earthquake scenarios. The equipment can conduct a full chain of earthquake scenario simulation: based on source physical processes, seismic wave propagation paths, site conditions, and building structures. Seismic scenarios of different sources, site conditions, floors, and response spectra are used to study human perception and reactions during walking. The experimental results are consistent with the description of human action at the current intensity scales of China, Europe, the USA, and Japan. Research shows that the PGV has a significant correlation with the impact of ground motion on human walking and can be used as a key indicator to determine the intensity. However, the correlation between the PGA and the impact on human walking is not strong. The predominant period of the response spectrum is also a key factor affecting human walking states in earthquake scenarios. Vibrations with periods between 0.5 s and 1.9 s have the greatest impact on the walking state, which is usually caused by high-rise buildings and deep soil sites and needs special attention. Moreover, horizontal vibrations dominate impacts on human walking in earthquake scenarios where the PGA ≤ 300 Gal. The results of this experiment can be applied to the study of the relationships between the macroscopic intensity and instrument intensity, the preparation of earthquake intensity scales, guidance on earthquake emergency avoidance actions, and the popularization of earthquake science.