TY - JOUR
T1 - Size-dependent model to predict the flexural strength of 3D printed engineered cementitious composites beams
AU - Yu, Jie
AU - Teng, Fei
AU - Ye, Junhong
AU - Zhang, Dong
AU - Yu, Kequan
AU - Yu, Jiangtao
AU - Dai, Jian-Guo
AU - Weng, Yiwei
PY - 2025/2/7
Y1 - 2025/2/7
N2 - This study developed a size-dependent model to predict the flexural strength of 3D printed engineered cementitious composites (ECC) beams with different beam spans. The proposed model relates the flexural strength of printed ECC beams to beam spans based on a stochastic tensile constitutive model of ECC, by taking the size effect into account. ECC beams with four spans (240 mm, 300 mm, 450 mm, and 1500 mm) were printed and tested by four-point bending. The results showed that the size-dependent model can predict the flexural strength with an approximate accuracy of 90%. Compared to the size-independent model, the proposed size-dependent model improved the prediction accuracy by approximately 27%. The force analysis of the shear strength of interlayers further revealed that interfacial bonding has a negligible impact on the simulated flexural strength. Consequently, the developed size-dependent model can potentially guide the structural design of 3D printed ECC beams. © 2025 Elsevier Ltd
AB - This study developed a size-dependent model to predict the flexural strength of 3D printed engineered cementitious composites (ECC) beams with different beam spans. The proposed model relates the flexural strength of printed ECC beams to beam spans based on a stochastic tensile constitutive model of ECC, by taking the size effect into account. ECC beams with four spans (240 mm, 300 mm, 450 mm, and 1500 mm) were printed and tested by four-point bending. The results showed that the size-dependent model can predict the flexural strength with an approximate accuracy of 90%. Compared to the size-independent model, the proposed size-dependent model improved the prediction accuracy by approximately 27%. The force analysis of the shear strength of interlayers further revealed that interfacial bonding has a negligible impact on the simulated flexural strength. Consequently, the developed size-dependent model can potentially guide the structural design of 3D printed ECC beams. © 2025 Elsevier Ltd
KW - 3D concrete printing
KW - Engineered cementitious composites
KW - Flexural strength
KW - Size effect
KW - Size-dependent model
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85215111377&origin=recordpage
U2 - 10.1016/j.conbuildmat.2025.139994
DO - 10.1016/j.conbuildmat.2025.139994
M3 - RGC 21 - Publication in refereed journal
SN - 0950-0618
VL - 462
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 139994
ER -