dc.contributor.authorZhou, Hongyuan
dc.date.accessioned2012-05-28T04:20:45Z
dc.date.accessioned2017-07-23T08:27:28Z
dc.date.available2012-05-28T04:20:45Z
dc.date.available2017-07-23T08:27:28Z
dc.date.copyright2012en_US
dc.date.issued2012
dc.identifier.citationZhou, H. Y. (2012). In-structure shock assessment and mitigation of structures. Doctoral thesis, Nanyang Technological University, Singapore.
dc.identifier.urihttp://hdl.handle.net/10356/49983
dc.description.abstractThis thesis deals with soil-structure interaction effect and structural response analysis, in-structure shock assessment, and shock wave mitigation when a structure is subjected to a blast load. Dynamic media-structure interaction is analytically discussed in the background of an underground structure subjected to a soil-transmitted dynamic load, in which an interfacial damping is incorporated to represent the dynamic soil-structure interaction. The effects of the interaction are analyzed and the aspects affecting the interaction are discussed. With this soil-structure interaction, in-structure shock of a typical underground structure subjected to a soil-transmitted blast load induced by a subsurface detonation is analyzed with a simplified beam model and a rigid-body-motion included plate model, respectively. With acceleration time history of the derived structural member as excitation, shock response spectra are established to assess the in-structure shock level of the equipment attached to the buried structure. To mitigate the in-structure shock, a new design of underground structures is proposed by adding an isolation slab inside the structure. The excitation mechanism for the equipment within the structure is altered and the vertical shock level is effectively reduced. In addition, in-structure shock induced by a soil blast with non-zero rise time is also analyzed. A small scale test is designed and conducted to validate the prediction. Tests results indicate that the predictions are favorably comparable with the experiment. When subjected to a close range spherical airburst, the response of a blast mitigation cladding with metal foam core is determined by energy method. Shock theory and rigid-perfectly-plastic-locking model is adopted to obtain the response of metal foam under high velocity crushing. This prediction has practical significance since it delineates the situation of a cladding subjected to a close range detonation event with realistic boundary. Further, density gradient metal foam as core of a blast mitigation cladding is theoretically investigated with shock theory and rigid-perfectly-plastic-locking model.en_US
dc.format.extent222 p.en_US
dc.language.isoenen_US
dc.subjectDRNTU::Engineering::Civil engineering::Structures and designen_US
dc.titleIn-structure shock assessment and mitigation of structuresen_US
dc.typeThesis
dc.contributor.researchProtective Technology Research Centreen_US
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.supervisorMa Guowei
dc.contributor.supervisorLim Chee Hiongen_US
dc.contributor.supervisorZhao Zhiyeen_US
dc.description.degreeDOCTOR OF PHILOSOPHY (CEE)en_US


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