Experimental Study On Progressive Collapse Resistance Of Non-seismic Reinforced Concrete Structures

Several famous continuous collapses have caused severe losses of life and property. It has become an important and realistic topic for national engineering technicians how to effective protect buildings and structures to still work under effect of accidental loads. Until now, the research on continuous buildings collapse is mainly simulated and analyzed by software, but the quantity on test research is very limited. Finite element software, however, can't be able to reappear components disconnect structure or to simulate collapse process, and the continuous collapse test of concrete frame structure is the important basis to realize the performance and characteristics of collapse.The paper designed a three-tiered 4×2 large-span space frame structure building model, in which unloads alternative bottom column for classification and simulates continuous collapsed process of disabled concrete frame structure by pseudo-static experiment method and its main research contents as follows:(1) The continuous collapsed test method analysis of earthquake non resistive concrete construction and the research with what method can accurately and completely reflect concrete frame structure continuous collapsed process by referencing structure earthquake resistive test method.(2) The continuous collapsed experimental research of earthquake non resistive concrete frame structure, in which we did the continuous collapsed tests of concrete space frame structure model, studied the continuous collapsed process of concrete frame structure when the bottom alternative column initially failed, and observed the position,order and angle size of load-displacement curve and structure plastic hinge by the space concrete frame structure model of earthquake non resistive construction.(3) We characterized the progressive collapse resistance of reinforced concrete frame structures of non-seismic design such as the load-displacement curve of test model, the position, order, and rotation ability of beam column plastic hinge,transformation process and pattern of structural mechanism。...