Progressive Collapse Analysis Of Reinforced Concrete Structure

The structural damage caused by progressive collapse has been heightened interest among civil engineers all around the world. Many countries have formulated the codes and standards to improve the building’s performance under the accident loads. But in our country, there is no code or standard to use in the design of engineering works.According to current General Services Administration progressive collapse guidelines, this paper uses linear-elastic static method to analyze one multi-storey reinforced-concrete frame based on the SAP2000structural analysis software. Different locations of the column influence the capacity to resist progressive collapse of reinforced-concrete frames differently, and this paper gives the schedule of how to decide the most sensitive column among plenty of columns. In addition, in accordance with Department of Defense code2009, this paper uses nonlinear dynamic methodologies to remove columns and compare7degree and8degree seismic fortification reinforced-concrete frame structure. Finally, a general rule of resistance of the structure during progressive collapse and the process of progressive collapse are proposed.The analysis results show that the seismic fortification intensity is higher, the structure has more alternate paths after initial damage, the capability to resist progressive collapse of reinforced-concrete frames is stronger.