| With the accelerating urbanization, the rapid development of economy and theprogress of science and technology, various cities are in the rectification of large-scaleexpansion and they are creating unprecedented wealth. Meanwhile, it has brought manyproblems to the development of the city: serious tension of land resources, ecologicalenvironment destruction, so they lead to rising land prices. Building density is alsogrowing, urban green space is less and less and the per capita is short.The traffic iscongestion and the air pollution is serious. However urban roof as the highest point of thebuilding behind full of sacred solemn feeling is ignored. The urban roof space became theedge of the city zone of "gray space" and caused a serious waste of resources. Therefore,we need to know and think again, we must insist on resources rational allocation, developand utilize the uncared-for space and make it play a greater value.This article point to the city’s public roof space development and the present situationat home and abroad are summarized in the first. We should clear cut the scope of itsresearch, and then through a lot of case analysis summary the classification andcharacteristics of urban public buildings functional roof space and the use value andfavorable conditions. And then points out the problems existing in the public building roofspace: the form of chaos, the lack of regional features, the problems of functional use andthe lack of demand for people. Secondly, the public buildings are summarized theinfluence factors of roof space design and the design principles in the cities. Then throughthe good cases at home and abroad for reference, and analysis the city of public buildingroof space design method is summarized as: based on the plane geometry of the roof spaceof public buildings design, based on spatial combination forms of public building roofspace design and improve the urban environment landscape public space design in sixaspects, such as roof construction. Finally, through an actual case, we should blend inspecific design methods among them. Give expression to the building roof city publicspace combine with ecological construction, we must respect for history and culture forthe development of new technology and new material application to combine with the trend.The rational use of urban public building roof space helps to improve the ecologicalenvironment of the city; To improve people’s quality of life and to purify the air, reducethe high intensity precipitation produce pressure to urban flood control and irrigation;Relieve urban heat island effect and improve the landscape environment of the city.Therefore, public building roof space utilization and design has a broad developmentspace, it has become the inevitable outcome of the urbanization process. |