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

Progressive collapse of buildings has occurred many times since the classic progressive collapse event in 1960s. It has become an important and realistic topic for national engineering technicians to know how to effectively protect buildings and structures to still work under effect of accidental loads. Computer software simulation or actual collapse of the structure of experimental research is an important way to study the structural properties of the progressive collapse. Until now, the research on continuous buildings collapse is mainly simulated and analyzed by software.But through the actual collapse tests of the structure with the analyze by software, the true performance of the collapse of the structure can be better understood, combined with experiments can provide a better basis for analysis, to increase the understanding of the performance of the structure collapsed.The paper designed a three-tiered 4×2 large-span space frame structure building model, in which unloads alternative bottom prism 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 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 alternative bottom prism 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.(2) The characteristic of resistance to progressive collapse of Non-seismic design of reinforced concrete frame structure was analyzed. By comparing the different positions of the column failure framework of the internal forces and deformation analysis of the test model beam plastic hinge occurrence, sequence and rotation capabilities, force structure, mechanism of the conversion process and conversion, structural damage mechanisms, suitable progressive collapse resistance characteristics of the characterization of their ductility indicators was established. (3) The paper carried on reinforced concrete frame progressive collapse analysis of the whole process simulation base on the ANSYS software. Reinforced concrete space frame of the test model to simulate progressive collapse analysis and comparison with test results, further tests failed to obtain access to other data and information, from the theory of reinforced concrete frame analysis of performance against progressive collapse,anti-collapse properties and ductility of continuous relationship between the size indicators was established.