This study investigates the effect of prestressing tendons on the progressive collapse performance of a 6and 20-story reinforced concrete model structures. According to nonlinear static and dynamic analysis results, the analysis model structures turned out to be vulnerable to progressive collapse caused by sudden loss of a fi rst story column. However, the RC structures reinforced by external prestressing tendons along fl oor girders showed stable behavior against progressive collapse. The retrofi t effect increased as the initial tension and cross-sectional area of tendons increased. The incremental dynamic analyses showed that the seismic performance of the model structure was also enhanced after the retrofi t using tendons. Based on analysis results, it was concluded that the retrofi t of existing buildings using prestressing tendons could be effective for increasing both progressive collapse resisting capacity and seismic performance of RC framed structures.

No abstract

No abstract