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All Journal Jurnal Infinity Civil Engineering Journal Jurnal Infinity
Cuong, Le Minh
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Civil Engineering, Building, Construction & Architecture Education Mathematics

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Double-Curvature Test of Reinforced Concrete Columns Using Shaking Table: A New Test Setup Linh, Nguyen Ngoc; Van Hung, Nguyen; Xuan Huy, Nguyen; Cuong, Le Minh; Xuan Dat, Pham
Civil Engineering Journal Vol 5, No 9 (2019): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2146.135 KB) | DOI: 10.28991/cej-2019-03091378

Abstract

This paper proposes a new test setup to study the double-curvature behavior of reinforced concrete (RC) columns using shaking table. In this setup, the seismic action is simulated by the horizontal movement of a long-heavy rigid mass sitting on the top of only one test specimen. The double-curvature mechanism of specimen is affected by the movement of the concrete mass on a test rig consisting four steel hollow-section columns fully anchored to the shaking table. Application of axial load on the specimen is made possible through a pre-stressing equipment connecting to its top and bottom bases. The current setup offers two improvements over the previous ones. First, it makes available greater ranges of test data for conducting bigger sizes of the specimens. Second, it allows to directly measure the variation of axial force in the test specimens while the test implementation can be fast and easy with a high safety margin even until the complete collapse of the test units. The current test setup has been successfully applied on two ½ scaled V-shaped columns. It has been shown that the column specimen with a low axial load level of 0.05f’cAg, where f’c is the concrete strength and Ag is the cross-sectional area of the specimen, can well survive at a ground peak acceleration up to 5.5 (m/s2) with a drift ratio of approximately 2.91%. Meanwhile, the column subjected to moderate axial load level of 0.15f’cAg can survive at a higher ground peak acceleration of 8.0 (m/s2) with a drift ratio of 3.75%. Furthermore, it is experimentally evidenced that the V-shaped cross-section does not deform in-plane under seismic action. The angle between two planes corresponding to the column web and flange are up to 0.03 (rad). This finding is significant since it contradicts the plane strain assumption available in the current design practice.
Mathematical modelling in higher education: Evolving research and emerging trends (1980–2023) Ngu, Pham Nguyen Hong; Nam, Nguyen Danh; Cuong, Le Minh; Thao, Trinh Thi Phuong
Jurnal Infinity Vol 14 No 2 (2025): VOLUME 14, NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v14i2.p393-418

Abstract

Mathematical education in higher education plays a significant role in training future citizens with problem-solving skills to meet professional requirements. One of the trends in teaching mathematics at universities that has received much focus is teaching mathematics through modelling. The article uses the bibliometric analysis method through Bibliometrix and VOSviewer software to analyze 271 publications extracted from the Scopus database to provide an overall picture of mathematics modelling research in higher education from 1980 to 2023. The results indicate that the growth trend of publications is unstable, with a significant increase in the last 5 years. The United States and China are the two leading countries in terms of the number of published publications and citations; Tecnológico de Monterrey (Mexico) is the affiliation with the highest number of publications; the Book series “International Perspectives on the Teaching and Learning of Mathematical Modelling” is the most release source on this topic. The article also analyzes co-occurring keywords and identifies 03 research trends on this topic, including using technology and computer programming in mathematics modelling curriculum for students of technical universities, teaching mathematic modelling in universities, as well as using technology in teaching modelling and STEM education, innovating teaching methods of mathematics modelling and applying information technology in teaching mathematics modelling in pedagogic training programs. This is the first bibliometric study on mathematics modelling. These important research results help scholars interested in this research direction have an overview through useful quantitative information regarding mathematical modelling research in higher education worldwide, thereby developing appropriate research trends.
Mathematical modelling in higher education: Evolving research and emerging trends (1980–2023) Ngu, Pham Nguyen Hong; Nam, Nguyen Danh; Cuong, Le Minh; Thao, Trinh Thi Phuong
Jurnal Infinity Vol 14 No 2 (2025): VOLUME 14, NUMBER 2, INFINITY
Publisher : IKIP Siliwangi and I-MES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22460/infinity.v14i2.p393-418

Abstract

Mathematical education in higher education plays a significant role in training future citizens with problem-solving skills to meet professional requirements. One of the trends in teaching mathematics at universities that has received much focus is teaching mathematics through modelling. The article uses the bibliometric analysis method through Bibliometrix and VOSviewer software to analyze 271 publications extracted from the Scopus database to provide an overall picture of mathematics modelling research in higher education from 1980 to 2023. The results indicate that the growth trend of publications is unstable, with a significant increase in the last 5 years. The United States and China are the two leading countries in terms of the number of published publications and citations; Tecnológico de Monterrey (Mexico) is the affiliation with the highest number of publications; the Book series “International Perspectives on the Teaching and Learning of Mathematical Modelling” is the most release source on this topic. The article also analyzes co-occurring keywords and identifies 03 research trends on this topic, including using technology and computer programming in mathematics modelling curriculum for students of technical universities, teaching mathematic modelling in universities, as well as using technology in teaching modelling and STEM education, innovating teaching methods of mathematics modelling and applying information technology in teaching mathematics modelling in pedagogic training programs. This is the first bibliometric study on mathematics modelling. These important research results help scholars interested in this research direction have an overview through useful quantitative information regarding mathematical modelling research in higher education worldwide, thereby developing appropriate research trends.
Co-Authors Linh, Nguyen Ngoc Nam, Nguyen Danh Ngu, Pham Nguyen Hong Thao, Trinh Thi Phuong Van Hung, Nguyen Xuan Dat, Pham Xuan Huy, Nguyen