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Fully nonlinear inelastic analysis of rectangular CFST frames with semi-rigid connections
Van-Tuong Bui,Quang-Viet Vu,Viet-Hung Truong,Seung-Eock Kim 국제구조공학회 2021 Steel and Composite Structures, An International J Vol.38 No.5
In this study, an effective numerical method is introduced for nonlinear inelastic analyses of rectangular concrete-filled steel tubular (CFST) frames for the first time. A steel-concrete composite fiber beam-column element model is developed that considers material, and geometric nonlinearities, and residual stresses. This is achieved by using stability functions combined with integration points along the element length to capture the spread of plasticity over the composite cross-section along the element length. Additionally, a multi-spring element with a zero-length is employed to model the nonlinear semi-rigid beam-to-column connections in CFST frame models. To solve the nonlinear equilibrium equations, the generalized displacement control algorithm is adopted. The accuracy of the proposed method is firstly verified by a large number of experiments of CFST members subjected to various loading conditions. Subsequently, the proposed method is applied to investigate the nonlinear inelastic behavior of rectangular CFST frames with fully rigid, semi-rigid, and hinged connections. The accuracy of the predicted results and the efficiency pertaining to the computation time of the proposed method are demonstrated in comparison with the ABAQUS software. The proposed numerical method may be efficiently utilized in practical designs for advanced analysis of the rectangular CFST structures.
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Enhancing the Customer’s Information-sharing Intention Through Omnichannel Strategies
Nguyen Thi Tuyet NHUNG(Nguyen Thi Tuyet NHUNG ),Van Thanh-Truong NGUYEN(Van Thanh-Truong NGUYEN ),Nguyen Tuong An HUYNH(Nguyen Tuong An HUYNH ),Bui Thanh KHOA(Bui Thanh KHOA ) 한국유통과학회 2023 유통과학연구 Vol.21 No.3
Purpose: An omnichannel strategy creates a consistent brand image and customer experience across all channels, making it easier for customers to interact with a business and share information. This research aimed to investigated the relationship between consumers' information-sharing intention and their omnichannel experiences. Research design, data, and methodology: Through an online survey conducted in Vietnam, the study obtained 915 responses. The study used Partial Least Square Structural Equation Modeling (PLS-SEM) to analyze research data and confirm proposed research hypotheses. Results: Research results indicated that information-sharing intention is affected by both online and offline customer experience, and at the same time, the study also confirmed that omnichannel’s three characteristics (integration, individualization, interaction) positively impact on customer experience. Conclusions: From the research result, businesses may boost consumer trust and loyalty with the help of an omnichannel approach, which in turn increases customers' propensity to provide personally identifying information to the firm. One way to do this is to facilitate information exchange by delivering customized and relevant offers. Furthermore, companies show consumers the benefit of providing their data by utilizing it to enhance the customer experience.
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Tran Thi Tuong Van,Nguyen Duc Linh,Nguyen Chi Hieu,Bui Tan Nghia 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.4
The plating industry is one of the causes of hexavalent chromium Cr (VI) pollution in surface water, raising problems for human health and other living things. In this study, we synthesized CoFe 2 O 4 magnetic nanoparticles and coated them with cetyltrimethylammonium bromide (CTAB), a commonly used cationic surfactant, to form CTAB/CoFe 2 O 4 magnetic nanocomposite for Cr (VI) adsorptive removal application from aqueous solution. Characteristic properties of CTAB/ CoFe 2 O 4 were examined using scanning electron spectrometry, surface area apparatus, X-ray diff ractometer, Fourier transform infrared spectrometry, zeta potential analyzer, and vibrating sample magnetometer. The CTAB/CoFe 2 O 4 had superparamagnetic properties, being easily isolated from an aqueous solution and well regenerated by an external magnet. Besides, the CTAB molecules anchored onto the Co 2 FeO 4 nanoparticle surfaces could increase the positive charge and thus facilitate the electrostatic interaction with the Cr (VI) anions. Accordingly, the CTAB/CoFe 2 O 4 reached the Cr (VI) adsorption effi ciency of 89%, two times higher than the pure CoFe 2 O 4 , at an optimal pH of 2, an adsorbent dose of 1 g/L, and an initial Cr (VI) concentration of 10 mg/L. The CTAB/CoFe 2 O 4 magnetic nanocomposite would promise a high potential for Cr (VI) treatment from plating wastewater with simple separation, good adsorption capacity, and an inexpensive, nontoxic production process.
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