Research On The Defense Safety Design Of Urban Composite Public Space

Composite public space is one of the most important spatial forms in city's space.The city composite public space is a multipurpose and multi-layered space type with different spaces are linked and infiltrated by each other,which always contains two or more functions such as business,office,entertainment,transportation and living.However,city composite public space is easy to show a high trend on crime due to it gathers multiple space relationship,complex population and huge amount of fortune.The article based on the subject of criminology,psychology,and other theories of defense security research on composite public space,Changchun.According to the organization mode of traffic line in urban multi-functional space,the composite public space of Changchun is summarized as linear composite function space,net composite function space,disperse composite function space,and mix composite public space.Take the Chongqing City,Changchun Road business circle,Guilin Road business circle,Eurasian business circle,and the south square of railway station circle on as the object of the research,to explore the relationship between the external environment and the defense security design of the composite public space and to obtain the environmental factors which affect the security of the multi-functional space of Changchun City.Finally,according to the characteristics of the composite public space environment,form the point of view of crime prevention in environmental design to propose to solve the current situation of the urban composite public space of Changchun City.By improving the quality of the composite public space environment to reduce crime stimulation,the external factors of the crime andenhance the defense of human in public space to reduce or even prevent the purpose of crime so that to improve the quality of the city's public environment.The article is divided into four chapters:The main content of the first chapter are as follow: Introduce the research background of the subject?purpose and significance,finish the research the status of domestic and international research status of the crime prevention through environmental design(CPTED)theory.The main content of the second chapter are as follow: Introduce the theoretical basis of the research.The paper briefly introduce the theory of CPTED,Defense Space,and the space theory of “easy crime”.To make adequate theoretical support for the research of the subject.The main content of the third chapter are as follow: Pointed at the present situation of the composite public space defense security in Changchun City.Combined with the landscape,road,construction and other aspects of Changchun City,to make a defense security analysis of linear composite function space,net composite function space,disperse composite function space,and mix composite public space.The main content of the forth chapter are as follow: Summarize the research strategy of the composite public space defense security design in Changchun City.Proposing to increase building external environment surrounding sense,improve the building facade,increase the road space design strategy,and thus reduce the occurrence of crime,improve the quality of public life environment.