Analysis of Plastic Box Girder Bridge with Twin Box Cross Sections
DOI:
https://doi.org/10.26418/jts.v26i1.104372Keywords:
Box Girder Bridge, Strain Hardening, Plastic Analysis, Moment–Curvature, Flexural Capacity.Abstract
In conventional steel bridge design, the material stress–strain response is often idealized as bilinear, neglecting strain hardening and potentially underestimating plastic capacity. This study investigates the influence of strain hardening on the plastic behavior of a plastic box girder bridge with twin box cross-sections. A 40 m span bridge with a total width of 10 m was analyzed using SAP2000 v15, following RSNI T-03-2005 for design provisions and RSNI T-02-2005 for loading. Two constitutive models were compared: a bilinear model and a strain-hardening model. The evaluation focused on the moment–curvature response, plastic moment, the extent of the inelastic region, and the shape factor. Results show that incorporating strain hardening increases the plastic moment from 171,000 kNm to 223,000 kNm, corresponding to a 23.32% enhancement. Moreover, the predicted length of the inelastic region increases by approximately 2.5 times relative to the bilinear assumption. These findings confirm that strain hardening substantially improves flexural capacity and ductility, highlighting the importance of realistic material modeling in plastic bridge analysis.References
Brockenbrought, R. L. (1999). Structural Steel Designer’s Handbook, 3rd edition. McGraw-Hill.
Byfield, M. P., Davies, J. M., & Dhanalakshmi, M. (2005). Calculation of the Strain Hardening Behaviour of Steel Structures based on Mill Tests. Journal of Constructional Steel Research, 61(2), 133–150.
Chen, W. F., & Lui, E. M. (2005). Handbook of Structural Engineering. CRC Press.
Clemente, P. (2025). History of Bridges: Materials and Structural Types of a Monument to Progress. International Journal of Bridge Engineering, Management and Research, 2(4), 214250035–1.
Galambos, T. V. (1972). Load Factor Design of Steel Buildings. Engineering Journal, 9(3), 108–113.
Hapsari, R. N. A. (2019). Permodelan Keruntuhan Geser Struktur Komposit Baja–Beton dengan Variasi Panjang dan Diameter Stud Menggunakan Metode Elemen Hingga. Jurnal Teknik Sipil, 11, 50–58.
Horne, M. R. (2014). Plastic Theory of Structures: In Si/Metric Units. Elsevier.
Ji, Y., Yao, B., & Xu, W. (2024). Research on Deflection Risk Assessment for Steel Box Girder Bridges Based on GA-BP Neural Network. Buildings, 14(12), 3923.
Jiang, L., He, W., Wei, B., Wang, Z., & Li, S. (2019). The Shear Pin Strength of Friction Pendulum Bearings (FPB) in Simply Supported Railway Bridges. Bulletin of Earthquake Engineering, 17(11), 6109–6139.
Lei, X., Sun, L., Xia, Y., & He, T. (2020). Vibration-Based Seismic Damage States Evaluation for Regional Concrete Beam Bridges Using Random Forest Method. Sustainability, 12(12), 5106.
Martins, J. P., & Cardoso, H. S. (2022). Elastic shear buckling coefficients for diagonally stiffened webs: thin-Walled Structures, 171, 108657.
Michelle, M., & Supartono, F. X. (2020). Analisis Jembatan Prategang Box Girder dengan Incremental Launching Method. JMTS: Jurnal Mitra Teknik Sipil, 3(2), 419–432.
Pereira, P., & Pais, J. (2017). Main Flexible Pavement and Mix Design Methods in Europe and Challenges for the Development of an European Method. Journal of Traffic and Transportation Engineering (English Edition), 4(4), 316–346.
Purwanto. (1997). Kajian Eksperimental Perilaku Elastoplastis Struktur Baja yang Dibebani Kombinasi Lentur dan Torsi. Thesis: Bandung Institute of Technology.
Rachma, I. N., & Sarifah, F. (2025). Analisis Kapasitas Box Girder dengan Metode Sectional Approach. Reinforcement Review in Civil Engineering Studies and Management, 4(1), 1–12.
Refinda. (1997). Pemodelan Perilaku Elastoplastis Penampang Balok Akibat Kombinasi Lentur dan Torsi. Thesis: Bandung Institute of Technology.
Saito, K., Yoda, T., Yamazaki, J., & Homma, A. (2016). Structural Characteristics of Box Girder Bridge with Strutted Wing Slabs. In 11th Fib International PhD Symposium in Civil Engineering, FIB 2016, 173–180.
Salmon, C. G., & Johnson, J. E. (1996). Struktur Baja Desain dan Perilaku 2. Jakarta: Penerbit Erlangga.
Setiawan, A. (2008). Perencanaan Struktur Baja dengan Metode LRFD (Sesuai SNI 03-1729- 2002). Jakarta: Penerbit Erlangga.
Sher, R. J., Irfan-ul-Hassan, M., Ghafoor, M. T., & Qayyum, A. (2020). Analysis and Design of Box Girder and T-Beam Bridge Superstructure: A Comparative Study. Mehran University Research Journal of Engineering & Technology, 39(3), 453–465.
Thompson, K. J., & Park, R. (1978). Stress-Strain Model for Grade 275 Reinforcing Steel with Cyclic Loading. Bulletin of the New Zealand Society for Earthquake Engineering, 11(2), 101–109.
Wahyudi, L., & Rahim, S. A. (1992). Metode Plastis, Analisis dan Desain. Jakarta: PT Gramedia Pustaka Utama.
Wang, A., Zhang, Z., Lei, X., Xia, Y., & Sun, L. (2021). All-Weather Thermal Simulation Methods for Concrete Maglev Bridge based on Structural and Meteorological Monitoring Data. Sensors, 21(17), 5789.
Wiwatanapataphee, D., Khajohnsaksumeth, N., & Wu, Y. H. (2019). Effect of Beam Joinery on Bridge Structural Stability. Advances in Difference Equations, 2019(1), 225.
Wong, M. B. (2011). Plastic Analysis and Design of Steel Structures. USA: Butterworth-Heinemann.
Yuslinda, Y., Rani, C. M., & Iqbal. (2023). Perbandingan Perilaku Plastis Jembatan Box Girder dengan Penampang Twin Box dan Cellular Box. PRINCE, 2(2), 218–227.
Zainy, F., (2012). Perilaku Balok Baja dengan Penampang Single Box, Twin Box, dan Cellular Box Akibat Beban Tetap. Thesis: Syiah Kuala University.
Zhang, G., Li, X., Tang, C., Song, C., & Ding, Y. (2023). Behavior of Steel Box Bridge Girders Subjected to Hydrocarbon Fire and Bending-Torsion Coupled Loading. Engineering Structures, 296, 116906.
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