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- 저자 : Sheliang Wang (검색결과 3 건)
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Meng Zhan,Sheliang Wang,Tao Yang,Yang Liu,Binshan Yu 국제구조공학회 2017 Smart Structures and Systems, An International Jou Vol.19 No.4
Based on the super elastic properties of the shape memory alloy (SMA) and the inverse piezoelectric effect of piezoelectric (PZT) ceramics, a kind of hybrid semi-active control device was designed and made, its mechanical properties test was done under different frequency and different voltage. The local search ability of genetic algorithm is poor, which would fall into the defect of prematurity easily. A kind of adaptive immune memory cloning algorithm(AIMCA) was proposed based on the simulation of clone selection and immune memory process. It can adjust the mutation probability and clone scale adaptively through the way of introducing memory cell and antibody incentive degrees. And performance indicator based on the modal controllable degree was taken as antigen-antibody affinity function, the optimization analysis of damper layout in a space truss structure was done. The structural seismic response was analyzed by applying the neural network prediction model and T-S fuzzy logic. Results show that SMA and PZT friction composite damper has a good energy dissipation capacity and stable performance, the bigger voltage, the better energy dissipation ability. Compared with genetic algorithm, the adaptive immune memory clone algorithm overcomes the problem of prematurity effectively. Besides, it has stronger global searching ability, better population diversity and faster convergence speed, makes the damper has a better arrangement position in structural dampers optimization leading to the better damping effect.
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Nan Zhao,Sheliang Wang,Xiaoyi Quan,Chunxuan Wang 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.6
With the advantage of superior crack width control ability, stress transmission capacity and energy dissipation capacity, engineered cementitious composites (ECC) show ultra-high strain hardening characteristic, and its ultimate tensile strain can reach 3% to 7%, which is hundreds of times that of the normal concrete when cracking occurs. As a new kind of building material, ECC need to get more sustainable through adding vicinal materials. In the present research, we investigate the influence of ternary binder system of bentonite, fly ash (FA) and cement (C) on the mechanical behaviours and microstructures of ECC. The ratio of FA/ C were 1.2, 1.8, 2.4 and the amount of bentonite by mass of ternary binder system were 0%, 5%, 10%, 15%, and 20% in each FA/C ratio, respectively. The flexural strength, flexural deflection capacity and compressive strength were tested at 14, 28 and 90 curing time. The results show that ECC with combined supplementary cementitious materials have the behavior of strain hardening. Moreover, it was found that higher FA/C ratio and higher bentonite content can improve the flexural deflection capacity. In addition, there is a decrease in flexural strength and compressive strength with the increase in FA/C ratio and bentonite content. Furthermore, it could be seen that fly ash and bentonite are beneficial to the long-term strength development of ECC.
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Zhang Hang,Cui Liu,Wang Sheliang 한국강구조학회 2024 International Journal of Steel Structures Vol.24 No.1
This paper presents a study on the performance of two types of fully bolted connections in relation to progressive collapse. Two specimens were specifi cally designed and fabricated to represent these connections. One specimen utilized the traditional double web angle connection (DWA), while the other employed a new type of connector, resulting in a new fully bolted connection (NFB). The study thoroughly investigated various aspects of the specimens, including failure modes, load–displacement responses, and resistance mechanisms. The fi ndings revealed that the fl exural behavior and ultimate behavior of the NFB connection were superior to those of the DWA connection, particularly in terms of fl exural behavior. However, the rotational behavior of the NFB connection was slightly inferior to that of the DWA connection. Additionally, refi ned numerical models were used to simulate the failure modes and load–displacement responses of both connections, and a strong correlation was observed between the test results and the numerical analysis. Furthermore, a parametric analysis of the NFB connection was conducted, leading to the discovery that modifying the structural type of the new connector, specifi cally adjusting the form of part C from fl ush to extended, was the most eff ective measure for enhancing the anti-progressive collapse capacity of the NFB connection. Moreover, the rotational capacity and ultimate load-carrying capacity of the NFB connection could be improved by adjusting the thickness of the new connector and increasing the diameter of the bolts within the steel beam.
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