1 Introduction
2 Literature Review
2.1 Combined Use of Elevators and Stairs
2.2 Factors Affecting the Choice Between Stairs and Elevators
3 Experiments
3.1 Building Layout
3.2 Experimental Procedure
4 Results and Discussion
4.1 Results of Questionnaires
Basic information | |
Gender | |
Male | 84.4% (38) |
Female | 15.6% (7) |
Are you familiar with the exits? | |
Yes | 20% (9) |
No | 80% (36) |
What do you usually use to go up to the 10th floor? | |
Elevators | 100% (45) |
Stairs | 0% (0) |
Do you think it is available to use elevators during emergency evacuation? | |
Yes | 4.4% (2) |
No | 95.6% (43) |
If you do not want to use elevators during evacuation | |
What is your concern? (Multiple answers) | |
Trapped in the elevator | 36 (22.2%) |
Lose power while travelling | 36 (22.2%) |
Elevator evacuation technologies are unreliability | 19 (11.7%) |
Fire or non-irritant smoke may spread into the elevator | 18 (11.1%) |
Too many people waiting for the elevator | 35 (21.6%) |
I am educated that elevators cannot be used | 11 (6.8%) |
Not safe, do not know the reason exactly | 7 (4.3%) |
If elevators are safe during evacuation, please answer the following questions | |
What do you think are the major advantages of using elevators? | |
Fast | 93.3% (42) |
Avoid the overcrowding on stairs | 6.7% (3) |
Above which floor will you use elevators? | |
5 | 15.6% (7) |
10 | 40.0% (18) |
20 | 22.2% (10) |
30 | 8.9% (4) |
40 | 2.2% (1) |
50 and above | 11.1% (5) |
Did you feel anxious in the experiment? | |
Yes | 82.2% (37) |
No | 17.8% (8) |
Which egress do you use? | |
Elevator | 26.7% (12) |
Stair | 73.3% (33) |
If you use the elevator, why? | |
Faster | 75% (9) |
Save physical strength | 8.3% (1) |
Safe | 8.3% (1) |
Follow others | 8.4% (1) |
Others (Please write down the reasons) | 0 |
If you use the stair, why? | |
Safe | 42.4% (14) |
Follow others | 15.2% (5) |
Do not want to wait for the elevator | 12.1% (4) |
Too many people waiting for the elevator | 15.2% (5) |
I cannot enter in the elevator because of overload | 12.1% (4) |
Others (Please write down the reasons) | 3% (1) (The elevator left, and I don’t want to wait for another trip) |
If you use the stair, do you feel fatigue when going downstairs? | |
Yes | 39.4% (13) |
No | 60.6% (20) |
Did you feel more anxious than that in the last time? | |
Yes | 75.6% (34) |
No | 24.4% (11) |
Did you speed up when you see the non-irritant smoke? | |
Yes | 80% (36) |
No | 20% (9) |
Which egress did you use? | |
Elevator | 24.4% (11) |
Stair | 75.6% (34) |
If you used the stair, did you feel fatigue when going downstairs? | |
Yes | 38.2% (13) |
No | 61.8% (21) |
Which one did you think that can influence your decision making on stairs or elevators? | |
Explanation | 73.3% (33) |
Experience | 26.7% (12) |
Neither of them | 0% (0) |
Which egress did you use? | |
Elevator | 40% (18) |
Stair | 60% (27) |
If you used the stair, did you feel fatigue when going downstairs? | |
Yes | 37% (10) |
No | 63% (17) |
4.2 Results of Experiment 1
ID | Waiting time (s) | Used the elevator? |
---|---|---|
Trip 1
| ||
1 | 27 | Yes |
2 | 24 | Yes |
3 | 20 | Yes |
4 | 20 | Yes |
5 | 12 | Yes |
6 | 12 | Yes |
7 | 7 | Yes |
8 | 5 | Yes |
9 | 1 | Yes |
10 | 1 | Yes |
11 | 0 | No |
12 | 0 | No |
13 | 0 | No |
Trip 2
| ||
1 | 74 | Yes |
2 | 70 | Yes |
4.3 Results of Experiment 2
ID | Waiting time (s) | Use elevator? |
---|---|---|
Floor 10
| ||
1 | 47 | Yes |
2 | 47 | Yes |
3 | 47 | Yes |
4 | 45 | Yes |
5 | 43 | Yes |
6 | 37 | No |
7 | 33 | Yes |
8 | 28 | Yes |
9 | 28 | No |
10 | 26 | No |
11 | 25 | No |
12 | 24 | No |
13 | 17 | No |
14 | 8 | No |
15 | 4 | No |
16 | 3 | No |
Floor 11
| ||
1 | 4 | Yes |
2 | 3 | Yes |
3 | 1 | Yes |
4.4 Results of Experiment 3
ID | Waiting time (s) | Use elevator? |
---|---|---|
Trip 1
| ||
1 | 31 | Yes |
2 | 31 | Yes |
3 | 31 | Yes |
4 | 30 | Yes |
5 | 19 | Yes |
6 | 19 | Yes |
7 | 15 | Yes |
8 | 15 | Yes |
9 | 11 | Yes |
10 | 5 | Yes |
11 | 5 | Yes |
12 | 1 | Yes |
13 | 1 | No |
Trip 2
| ||
1 | 74 | Yes |
2 | 74 | Yes |
3 | 73 | Yes |
4 | 72 | Yes |
5 | 72 | Yes |
6 | 71 | Yes |
4.5 Evacuation Phenomena
4.6 Comparison with Other Studies
Range (second) | 1–5 | 6–15 | 16–30 | 31–45 | 46–60 | 61–75 |
Number of evacuees | 3 | 3 | 4 | 0 | 0 | 2 |
Cumulative number | 12 | 9 | 6 | 2 | 2 | 2 |
Percentage (%) | 100 | 75 | 50 | 16.7 | 16.7 | 16.7 |
Range (second) | 1–5 | 6–15 | 16–30 | 31–45 | 46–60 |
Number of evacuees | 5 | 1 | 6 | 4 | 3 |
Cumulative number | 19 | 14 | 13 | 7 | 3 |
Percentage (%) | 100 | 73.7 | 68.4 | 36.8 | 15.8 |
Range (s) | 1–5 | 6–15 | 16–30 | 31–45 | 46–60 | 61–75 |
Number of evacuees | 4 | 3 | 3 | 3 | 0 | 6 |
Cumulative number | 19 | 15 | 12 | 9 | 6 | 6 |
Percentage (%) | 100 | 78.9 | 63.2 | 47.4 | 31.6 | 31.6 |