New paper out by Dr. Lingzhen Li
on a prestressed bonded strengthening system using iron-based shape memory alloy (Fe-SMA), now out in Engineering Structures
New paper out, led by Lingzhen Li (Empa and Chair of Structural Mechanics and Monitoring at ETH Zurich) in collaboration with Sizhe Wang (Empa and Nanyang Technological University), Eleni Chatzi (ETH Zurich), Masoud Motavalli (Empa), and Elyas Ghafoori (Empa and Leibniz University Hannover)!
This work presets an analytical modeling approach to predicting the prestressing effect in steel, glass, and reinforced concrete (RC) members strengthened by bonded/near surface mounted Fe-SMA strips/rebars. The analyzed prestress levels, in terms of the strains and deflections in parent structures, closely approximate the experimental results reported in existing literature.
Our parametric study and sensitivity analysis indicate that increasing the activation temperature (within a certain range) and widening the Fe-SMA strips could most effectively enhance the prestressing effect. We further propose a design strategy, in line with Eurocode 0, for the bonded/embedded Fe-SMA strengthening system. The employed analysis methodology and resulting analytical models can support national/regional standards in the design of prestressed bonded strengthening for existing structures.
Read more in the latest publication in Volume 303 of Engineering Structures
external pagehttps://www.sciencedirect.com/science/article/pii/S0141029624000750?via%3Dihub
This work forms a part of the PhD thesis of Dr. Lingzhen Li: Bond behavior and debonding failure in Fe-SMA strengthened steel members (full text available in ETH Research Collection).
https://www.research-collection.ethz.ch/handle/20.500.11850/637238