Research On The Performance-based Assessment On Nightscape Lighting Of Chinese Ancient Architecture In The Urban Core Area

In this paper, the purpose of this study was the performance-based assessment on nightscape lighting of Chinese ancient architecture in the urban core area. Writer's researches are based on the surveying of the distribution conditions in the typical domestic cities and a great quantity of actual lighting cases in order to analysis and summarize the lighting performance of ancient architecture.Starting with the night lighting environment of the urban core, Writer intensively analyzed illuminant and color performance requirements of night lighting of ancient buildings, then put forward the basic lighting performance requirements of the Chinese ancient architecture.According to the typical illuminant environmental character of urban core area, appropriate luminance level and subjective evaluation experimental research was carried on. Based on the typical luminance environment to choose representative ancient building model, 64 building luminance scenes were formed with demarcation for the luminance gradient of ancient building under the lab condition. Through the subjective evaluation and data process, appropriate ratio on the lighting luminance of typical ancient building was obtained. Function relation has been established between the two subjective indexes (brightness coordination in the main body of buildings and brightness coordination with environment) and the brightness indexes of ancient buildings.On the other hand, a large number of first-hand data were collected according to the testing of Ancient architectural lighting of the'Color Authenticity'under laboratory conditions and subjective evaluation experiments. Through statistical analysis of the experimental data by software, Color Difference Value of traditional decorative paintings of ancient buildings were calculated and comparative analyzed by using different lighting sources to obtain priority order of luminaries for respective color blocks. The threshold range of chromatic aberration has been initially established in different color test block through the field test evaluation.Through the research on the reasonable color performance of ancient buildings and the brightness ratio, linking up with lighting protection of ancient buildings and lighting technology implementation of the ancient architecture. On this foundation, the basic evaluation system was proposed which combined the main criteria of the performance requirements of carriers, subjective vision feelings of night with lighting technology. And then Writer further analyzed and established 16 sub-elements of evaluation criteria. In conclusion, the weight of each evaluation factors were analyzed and identified by AHP with rating scales and semantic models and data analysis, in order to provide a reliable technical approach to the performance-based assessment on nightscape lighting of Chinese ancient architecture in the urban core area in the future.