PSI - Issue 64

Eun-Rim Baek et al. / Procedia Structural Integrity 64 (2024) 1117–1124 Author name / Structural Integrity Procedia 00 (2019) 000–000

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Fig. 3. Force-drift curves for the three specimens: (a) CT 1, (b) RT-TRM, (c) RT-TCP and (d) comparison of all envelope response curves. (adapted from Baek et al., 2022). 4. Discussion and Conclusions In this study, a novel precast panel system, the TCP retrofit method, was developed to simultaneously enhance the seismic performance and energy efficiency of existing buildings. Three infilled RC frames were tested under reversed cyclic loading to evaluate the effectiveness of the TCP system. The seismic performance of a TCP retrofitted RC frame was compared to that of a reference RC frame infilled with concrete block masonry and to that of a B-TRM-retrofitted frame with XPS thermal insulation. Both implemented retrofit solutions provided satisfactory improvements to the behaviour of as-built specimens, most crucially in lateral load capacity. Significant enhancements in energy dissipation were obtained for both retrofitting schemes, and the onset of damage was delayed. The TCP retrofit solution was shown to have great potential for practical implementation, providing a low-cost and high-efficiency retrofit technology for the much-needed integrated retrofitting of existing buildings. This method is anticipated to be further improved in future work by improving the connection to the frame and between the panels. To build on the findings of this study, future research will focus on experimentally validating the proposed retrofit system on a two-storey structure through dynamic shaking table testing. Future developments could also involve detailed numerical simulations to complement the experimental findings. Possible analyses include: i. simulating the behavior of TCP-retrofitted structures under various loading conditions to predict performance and identify potential improvements; ii. investigating the effects of different design parameters, such as panel thickness, material properties, and connection details, on the overall performance; iii. modelling the thermal behavior of buildings retrofitted with TCP panels to optimize the design for maximum energy savings.