this study, PSPL survey was made in about one year to investigate the type and occurring time of outdoor activities and
the visitors’ demand difference of Round-City-Park in Xi’an, China. The survey method for collecting data included spatial
classification, photographic recording, field observation, questionnaires and interviews. Then a new method of
Virtual Typical Day (VTD) was put forward to analyze usage pattern of public space in the daily life. According to our
results, laying out more public spaces close to residential area can make a more vigorous city. And the results also
reveal that there exist some problems of uneven usage periods in different spaces, various space requirement from different
age groups, insufficient support of space and facilities and so on. Based on the survey, an optimizing strategy of
adaptive design is proposed such as setting mobile “stage” and providing flexible “props” according to the changing
demands. The proposed design approach can encourage people to participate in outdoor activities, improve usage
frequency of public spaces, and stimulate vitality of the city. This may also apply to other Chinese cities.
Keywords: Daily Life, Public Space, Pspl Survey, Virtual Typical Day, Adaptive Design.
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