| 英文摘要 |
The retrofitting methods widely used in Taiwan are reinforced concrete (RC) jacketing, adding wing walls, and adding shear walls. However, if these retrofitting methods are applied to mid-to-high-rise buildings, this may cause opposition because the residents need to be resettled during the retrofitting process. Therefore, this research focuses on the application of external RC frames, a retrofitting method rarely used in Taiwan, in order to address the problems associated with conventional retrofitting methods. In this method, the seismic force is transmitted through the slabs to the external RC frames. Therefore, the shear strength of the slabs is the key point of the research. According to shear strength tests conducted on slabs designed in this research, it is confirmed that, if the width-tospan ratio of the slabs is between 0.125 and 0.375, then the shear strength of the slabs is only related to the total span of the slabs and the failure mode is shear failure. Furthermore, it is confirmed that using the Concrete Structures Design Code (2017) of Taiwan for the design strength of slabs is conservative. |
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