Study on the Safety Evaluation Method of Life-Saving Passage in Building Ruins under the Action of Aftershock

<div>The probability percentage <i>P</i> (%) of the secondary collapse of the life-saving passage under aftershock after the main earthquake within 168 h rescue time.</div>

Shock and Vibration

fig20

Figure 20

Figure 20: Study on the Safety Evaluation Method of Life-Saving Passage in Building Ruins under the Action of Aftershock 