The Dynamic Property Analysis Of Vehicle Collisions On High-rise Stereoscopic Parking Steel Structure

In recent years, with the rapid growth in the number of vehicles and the seriouslypoor urban parking infrastructure, vehicle parking contradictions have increasinglyworsened. On the other hand, as urban land resources are limited, traditional groundparking lots no longer meet the demand of current society, which results that ahigh-tech stereo garage will become a new and necessary trend.The multi-storey stereo garage would effectively alleviate the pressure of urbanparking lots. Though this structure has been applied in some areas, it basically refersto codes of high-rise steel structure design in China. Due to vehicle parking require-ments, the stereo garage structure differs from ordinary steel structures. However, atpresent, the studies on stereo garages are mostly about the operation and developmentof mechanical equipments. Some reliability analyses of stereo garages are confined tostructural component but neglect the structural internal refactoring caused by loadchanges or component damage, especially impact problems.Statistics of international traffic accidents show that speeding vehicles seriouslythreaten the safety of ground transportation facilities today. If traffic collisions hap-pen on high stereo garages, they will cause huger loss of property. Therefore, the re-search of dynamic performance of vehicle collisions on high-level stereo garage isquite necessary.Based on vertical movements of high rise stereo garages, this thesis analyzes thewhole and part dynamic performances caused by vehicle collisions in detail. Simul-taneously, the thesis puts forward several simplified models of vehicle collisions onstereo garage and also discusses dynamic effects in progressive collapse resulted fromthe initial damage to steel stereo garages. The main contents are as follows.First of all, the thesis summarizes methods of static and dynamic design of thestereo garage structure under vehicle collisions and provides both the theoreticalformula and numerical analysis for the dynamic response, which sets up a completetheoretical system for stereo garages anti-collision design.Secondly, the thesis presents a simulation of vehicle collisions on high stereogarages. Use ABAQUS/Explicit for nonlinear dynamic analysis and discuss how thevehicle collision speed and the loading duration etc. exercise an influence on the ste-reo garage dynamic properties. In addition, the thesis deeply analyzes the response to vehicle collisions on highstereo garages and puts forwards two new stereo garages simplified analysis modelsof vehicle impact. In the meantime, the thesis studies how the constraint length andboundary conditions influence the accuracy of the simplified model s.The last but not least, the thesis considers the dynamic effect in progressive col-lapse resulted from the initial damage to steel stereo garages and analyzes how theinvalid column position or joint stiffness etc. have an influence on dynamic effect,which makes clear reasonable value range of dynamic magnification factor and estab-lishes some anti-collapse design advices of steel stereo garage structures.