Comparative flexural performance of primitive, diamond, and gyroid TPMS concrete beams

  • Tran Anh Tuan

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
    Research Group R2026-UTC-09, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Hoang Viet Hai

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
    Research Group R2026-UTC-09, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Nguyen Hoang Quan

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
    Research Group R2026-UTC-07, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Tran Thi Bich Thao

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
    Research Group R2026-UTC-09, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
  • Tran Bao Viet

    University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
    Research Group R2026-UTC-07, University of Transport and Communications, No 3 Cau Giay Street, Hanoi, Vietnam
Email: hoangviethai@utc.edu.vn
Từ khóa: TPMS; concrete; flexural behaviour; Concrete Damaged Plasticity; accumulated external work; normalized deformation index; architected porous concrete

Tóm tắt

This study investigates the nonlinear flexural behaviour of Primitive, Diamond, and Gyroid triply periodic minimal surface (TPMS) concrete beams using the Concrete Damaged Plasticity model in Abaqus/Standard. All beams had identical external dimensions, C30/37 concrete properties, and a nominal solid volume fraction of 50%, allowing topology to remain the main variable. A combined geometric-resolution and mesh sensitivity study was conducted, and the R24 models were adopted as the common comparative reference. Structural performance was evaluated using peak load, secant stiffness, accumulated external work up to a common post-peak load threshold, mass-normalized accumulated work, normalized deformation index, and damage distributions. Primitive exhibited the highest secant stiffness (46.5 kN/mm) and peak load (5.12 kN) but showed localized damage, rapid post-peak load reduction, and the lowest accumulated work (0.93 J). Diamond achieved a slightly lower peak load (4.77 kN) while providing the highest accumulated work (1.85 J) and mass-normalized accumulated work (0.39 J/kg), indicating a favorable balance between strength and work accumulation under the adopted numerical assumptions. Gyroid showed the lowest peak load (3.56 kN) but the highest normalized deformation index (2.16). The results demonstrate a clear topology-dependent trade-off among stiffness, strength, accumulated work, and deformation capacity, and provide preliminary numerical insights for future experimental validation and investigation of load-bearing, permeable TPMS concrete structures.

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Kiểu trích dẫn
Tran Anh, T., Hoang Viet, H., Nguyen Hoang, Q., Tran Thi Bich, T., & Tran Bao, V. (1794675600). Comparative flexural performance of primitive, diamond, and gyroid TPMS concrete beams. Tạp Chí Khoa Học Giao Thông Vận Tải, 77(9), 1170-1184. https://doi.org/10.47869/tcsj.77.9.4