Architectural Color Quantitative Method Study On The Effect Of The Daylight Spectrum And Atmospheric Attenuation

This dissertation is a funding project of the NCFS subject “Architectural ColorControl Study on the Effect of the Daylight Spectrum and AtmosphericAttenuation”(Grant No51078364) and the university central graduate studentindependent research projects of science and technology innovationfund(Grant NoCDJXS12190008).Architectural color includes contents about social humanity and scientifictechnology. For a long time, architectural color design has been analyzed fromhistorical, contextual, conventional, aesthetic and other aspects rather than a scientificquantitative research perspective. So that architects don’t know much about the changeof architectural color in actual space (the effect of the architectural color present in thespace). Then architects can’t accurately grasp the design of architectural color that leadto a larger deviation between design color and the actural color. Architectural color ispresented in urban space, being affected by sunlight spectrum, daylight colortemperature, atmospheric attenuation, observation distance, light reflectioncharacteristics of facing materials and other factors. To do research on the affect andquantitative methods is indispensable foundation of science and technology forarchitectural color design.According to China’s different light climate zoning and city geographicaldistribution (East, South, West, North and Central), the dissertation chose sevenrepresentative cities including Kunming, Xining, Beijing, Shenzhen, Nanjing, Nanchangand Chongqing. For representative buildings of these cities’ key areas, the dissertationdid a series works such as color investigation, photographs, sampling, measurement,analysis and so on. Then these cities’ architectural color status and external decorativematerials usage could be known which laid a solid foundation for the research of thisproject.On the basis of analyzing the typical daylight and correlation theories, anexperiment research of color difference of specimen materials under different standardilluminants has been carried out, and the color difference between different CIEstandard illuminants withD65has been gotten. The dissertation analyzed change rule ofthe sunny sun illumination, brightness and color temperature. An experiment research ofthe influence of architectural color under different weather and light conditions has been carried out, and the color difference between D65with sunny clear light, sunny backlight,sunny shadow, cloudy day has been gotten. The dissertation did a tracking test ofdaylight spectrum characters in seven representative cities and analyzed the daylightspectrum characters of different light climate zoning. Analyzing the influence ofdaylight color temperature for architectural color, the functional relationships betweenthe color temperature difference|ΔK|with|Δa*|,|Δb*|, color difference ΔE have beengotten.This dissertation presented an analysis of the theory of spatial color decayincluding Lambert-Beer law of atmospheric decay theory, particle scattering theory andso on. By selecting different atmospheric visibilities and various observation distances,an experimental research has been conducted on architectural color decay law. Thisdissertation determined the attenuationfunctional relationship of architectural colorparameters in urban space.An experiment research of building facing materials reflection characteristicsunder different illumination/observation conditions has been carried out, and theluminance and chrominance reflection characteristics of these materials have beenresearched. This dissertation measured the glossiness and spectral reflectanceof facingmaterialsand the relationship between building facing material reflection characteristicswith glossiness, reflection coefficient has been gotten.Through the computer artificial neural network technology, this research chose thecommon success three layers BP network as the basic structure and uniformity analyzedsun light spectrum, daylight color temperature affection,weather and light conditions,atmospheric scattering, atmospheric visibilities, observation distances, material lightreflection characteristics, illumination/observation conditions,material type,glossiness,reflection coefficient. Then the control index and calculation model of building colorcalculation model has been determined, and the building color quantitative calculationprocedure and building color design computer software has been exploited. Theseresults could provide science and technology foundation support on building colordesign and solve the practical problems in the design of architectural color. Theseresults have strong theoretical property and practicability.The main innovation points of this paper：1、This dissertation first proposes using daylight spectrum and atmosphericattenuation theory to quantitative research space architectural color and provides a newmethod for architectural color research. 2、This dissertation researches the daylight spectrum characters of different lightclimate zoning and the functional relationship between daylight color temperature witharchitectural colorparameters has been gotten.3、This dissertation analyzes atmospheric attenuation of architectural space colorwith different atmospheric visibilities and various observation distances and establishesthe attenuationfunctional relationship of architectural color brightness and saturation.4、 Through the computer artificial neural network technology, thisdissertationdesigns the structure for architectural color quantitative calculation andprovides foundation support on building color design computer software.