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Optimal hysteresis of shape memory alloys for eliminating seismic pounding and unseating of movement joint systems
Faculty
Engineering
Year:
2023
Type of Publication:
ZU Hosted
Pages:
e02219
Authors:
Mohamed Hamdy imam Mohammed Saleh Feky
Staff Zu Site
Abstract In Staff Site
Journal:
Case Studies in Construction Materials Elsevier
Volume:
19
Keywords :
Optimal hysteresis , shape memory alloys , eliminating
Abstract:
Bridge structures adapt to movement through the addition of joint systems that accommodate anticipated movement due to temperature variations or earthquakes, thereby relieving stress on the bridge structure. Shape memory alloys (SMAs) have been proposed to limit joint displacements because of their ability to dissipate seismic energy and restore their original shape. A parametric study is conducted in this study using computer simulations of some advanced MATLAB programs to show the effects of all hysteretic parameters of SMA retrofit devices on seismic joint openings. The results show that SMA hysteretic parameters have a huge effect on SMA efficiency as a restrainer, which is compatible with energy dissipation philosophy, but there are some reversible impacts of some hysteretic parameters in some cases due to the resonance problem and their dependence on other parameters such as natural time period, period ratio, mass ratio, and seismic records. As a result, some design charts are created in this study after more than 200 million trials, taking into account the variation of all key parameters of the structure and the SMA under a suite of historical ground motion records. Moreover, bridge designers can choose optimal SMA hysteresis for a desired opening width, a desired time period, and desired period/mass ratios between adjacent frames with the help of these charts to overcome the two bridge problems of pounding and unseating of bridge decks.
Author Related Publications
Mohamed Hamdy imam Mohammed Saleh Feky, "Efficiency of shape memory alloy seismic restrainers for several conditions of bridge joints", GRUPPO ITALIANO FRATTURA, 2023
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Mohamed Hamdy imam Mohammed Saleh Feky, "Theoretical Study on the Flexural Behavior of Structural Elements Strengthened with External Pre-Stressing Methods", MDPI, 2021
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Mohamed Hamdy imam Mohammed Saleh Feky, "Mechanical properties stabilization of low plasticity Kaolin soil using fly ash and hydrated lime", Elsevier Inc, 2024
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Department Related Publications
Elsayed saad Abdelsalam Salman, "S. Abdel Salam, A. Akl, O. Shallan, “DYNAMIC ANALYSIS OF TUNNEL”, Proceedings of the International Congress on Tunneling and ground Conditions, 3-7 April 1994, national Authority for Tunnels, Cairo, Egypt.", Proceedings of the International Congress on Tunneling and ground Conditions national Authority for Tunnels, Cairo, Egypt., 1994
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Elsayed saad Abdelsalam Salman, "S. Abdel Salam and M. Mashhour, “EFFECT OF FOOTING DIMENSIONS ON THE CONTACT PRESSURE AND INTERNAL STRESSES FOR A STRIP FOOTING” 24 Journal of Egyptian Society of Engineers, No.1, Vol.:P9-14,", 24 Journal of Egyptian Society of Engineers, No.1, Vol.:P9-14,, 1985
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Elsayed saad Abdelsalam Salman, "S. Abdel Salam, H.O. Soliman, O. Shallan, and Alaa M. Saad “SENSITIVITY ANALYSIS OF GEOMETRIC NON-LINEAR PARAMETERS ON CABLE–STAYED BRIDGES”11th Internal. Colloquium On Structural and Geot Eng. 17-19 May 2005 , Ain Shams Univ. , Cairo , Eg", S. Abdel Salam, H.O. Soliman, O. Shallan, and Alaa M. Saad “SENSITIVITY ANALYSIS OF GEOMETRIC NON-LINEAR PARAMETERS ON CABLE–STAYED BRIDGES”11th Inte, 2005
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Elsayed saad Abdelsalam Salman, "A. Elshihy, H. Shihab , S. Abdel Salam, M. Saleeb, “ SHORT-TERM AND LONG-TERM DEFLECTIONS OF FULLY COMPOSITE STEEL-CONCRETE BEAMS”, Proceedings of 8th Arab Structural Engg. Conference, Cairo University, Cairo Egypt, October, 2000.", Proceedings of 8th Arab Structural Engg. Conference, Cairo University, Cairo Egypt, 2000
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Mohammed Reda Ali Elewa, "Behavior of steel I-beam embedded in normal and steel fiber reinforced concrete incorporating demountable bolted connectors", Elsevier, 2019
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