Research On Mechanics Performance Of Primary-secondary Structure System Based On Modular Disassembly

At present,the demolition technology of high-rise structures still adopts the traditional mechanical demolition and blasting demolition methods,which will cause greater waste of resources and environmental pollution.In order to seek environmentally friendly,safe and efficient dismantling methods for high-rise structures,this paper takes high-rise primary and secondary structure systems as an example to study the modular disassembly method and its impact on structural mechanical properties,and to verify that no continuous collapse occurs during the disassembly process.Because the primary structure and secondary structure of the high-level primary and secondary structure system are distinct,the secondary structure has little impact on the main body and has diversity and reproducibility,which can form a modular space,which provides the possibility of easy assembly and disassembly.Based on the above characteristics,this paper proposes a modular design method for the secondary structure,and focuses on the primary and secondary structural system disassembly sequence planning,disassembly process mechanical properties and anti-collapse performance,the specific research content is as follows:Research on disassembly sequence planning of sub-structure submodules.Taking the secondary structure in the primary and secondary structure system as the research object,it is split according to the principle of modular splitting of the secondary structure to complete the diversity sub-module combination.By simulating the disassembly of sub-modules,the mechanical properties of vertical structural members are analyzed to find the optimal disassembly sequence of different sub-module combinations,and then the impact of different connection methods of sub-structure sub-modules on disassembly safety is studied.The results show that on the basis of reasonable disassembly sequence planning,the substructure disassembly should follow the disassembly sequence of small modules and top-down disassembly,and the structure with more articulated connections is safer and more efficient in the disassembly process.Research on disassembly sequence planning of primary and secondary structural systems.Taking the primary and secondary structural system as the research object,based on the connection relationship of the structure and its mechanical properties,a mixed graph model of structural disassembly information is established based on the graph theory method,and the primary and secondary structural system disassembly sequence is planned and studied.Considering thechanges in the mechanical properties of the primary and secondary structural systems and the efficiency of the disassembly sequence,the optimal disassembly sequence is selected to further compare the impact of the different connections between the primary structure and the secondary structure on the demolition safety.It is proposed that the primary and secondary structure system should follow the disassembly sequence of “dismantling the secondary structure at the same time,and then dismantling the primary structure from top to bottom”.The main structure and the secondary structure adopt more hinged connection methods,which have less impact on the primary and secondary structure system disassembly,More beneficial.Study on mechanical properties and anti-continuous collapse performance of primary and secondary structures during disassembly.Taking the primary and secondary structural system as the research object,by analyzing the influence of the internal force on the primary and secondary structural system during the disassembly process,the internal force distribution and the force transmission path of the primary and secondary structural system during the disassembly process are summarized.Based on the static analysis of the dismantling component method,it is verified whether the primary and secondary structural systems have good resistance to continuous collapse during the demolition process.It is analyzed that the internal force redistribution occurs during the disassembly process,and the remaining secondary structure helps the primary structure to bear part of the force to only bear its own weight.Finally,it is proved that the top-down disassembly method can ensure that the primary and secondary structure system disassembly process does not continuously collapse.