دانلود رایگان مقاله انگلیسی آسیب پذیری لرزه ای ساختمانهای بتنی با ضخامت کم و متوسط - اشپرینگر 2017

Abstract

This study focuses on seismic vulnerability assessment of reinforced concrete buildings designed by considering only gravity loads. Fragility curves are developed for a three-story reinforced concrete office frame building and a four-story reinforced concrete school building with unreinforced masonry infill walls representative of the essential facilities in Malaysian Peninsula. A simplified modeling approach is adopted for fragility analysis, which can effectively reduce the computational effort. A set of fragility curves are developed in terms of peak ground acceleration with lognormal cumulative distribution functions. The fragility analysis shows that the seismic performance of the structures met the desirable performance level recommended by current seismic code, demonstrating low vulnerability of the structures within Malaysian Peninsula. It is also shown that the soil condition should be taken into consideration for effective seismic vulnerability assessment. Finally, the fragility curves developed in this study are compared to those of HAZUS.

8 Conclusions

Analytical fragility curves for a three-story reinforced concrete office frame building and a four-story reinforced concrete school building with unreinforced masonry infill walls were developed in this study. A simplified model was developed based on fiber beam–column element and equivalent strut to describe the critical inelastic behavior of the structures in an effective manner. The analytical model shows a good agreement with shake table tests. The fragility curves were then developed for the structures by considering the uncertainty in seismic demand.

The fragility analysis shows that the seismic performance of the structures met the desirable performance level recommended by the current seismic code, indicating low vulnerability of the structures within Malaysian Peninsula. It is also shown that the soil condition should be taken into consideration for effective seismic vulnerability assessment of reinforced concrete buildings with or without unreinforced masonry infill walls. Moreover, the analytical fragility curves developed in this study show higher probability of exceeding a limit state than those of HAZUS. This is probably due to different source of data used in the generation of fragility curves.