Study On Progressive Collapse Resisting Capacity Of Coal Transport Trestle In Thermal Power Plants

In recent years, the frequent occurrence of progressive collapse at home and abroadhas gained more and more attention from the structural engineers. It has become an ur-gent task to analyze the relevant progressive-collapse-resisting performance for improv-ing the structural safety. Most of the current research regarding progressive-collapse-resisting capacity has been focusing on the reinforced-concrete-and steel-frame struc-tures; and far less of such studies have been given to the coal transport trestle. Once thecoal transport trestle structure progressively collapses, the whole power system mightstop production. The thermal power plants system belongs to the lifeline engineering,which is related to our human survival development environment. Then, it is necessary tostudy the progressive collapse capacity of coal transport trestle in thermal power plants.In this paper, the progressive collapse capacity of coal transport trestle, designed accord-ing to the China building codes, is extensively investigated, and the main contents are asthe following:1. The three-dimensional finite-element model is established with the finite-elementanalysis software SAP2000. By removing the column, the progressive collapse analysisis performed by means of the ‘pushdown’, and the ultimate load-bearing capacity of thestructure is derived.2. The progressive collapse capacity is analyzed by four methods: the linear andnon-linear static analysis, as well as the linear and non-linear dynamic analysis. Linearevaluation of the failure criteria is based on the Demand-Capacity Ratio (DCR); whilenonlinear evaluation of the failure criteria is based on the structural deformation.3. The results on the progressive collapse capacity obtained from the four analysisapproaches are compared, and the method appropriate for analyzing the progressive col-lapse capacity is presented.