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

Table 7

The probability percentage p′ (%) of the secondary collapse of the life-saving passage.

Aftershock	4.0–4.4	4.5–4.9	5.0–5.4	5.5–5.9	6.0–6.4	6.5–6.9	7.0–7.4	≥7.5
P′	0	0	7.14	21.4	35.7	42.8	71.4	82.1