Research on cohesive zone constitutive model of adhesive joint in prefabricated wind turbine hybrid tower and the bearing capacity of tower

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (4) : 71-81.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Research on cohesive zone constitutive model of adhesive joint in prefabricated wind turbine hybrid tower and the bearing capacity of tower

HUANG Cirong*1,2，ZHANG Dongliang1,2，FU Kun1,2，LI Tianhao1,2，HE Lan1,2，ZHANG Jiawei1,2

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Abstract

In order to investigate the bonding performance of adhesive joints in prefabricated wind turbine hybrid towers and the overall bearing capacity of the tower, this paper conducted normal tensile and tangential shear experiments on the concrete-structural adhesive bonding interface. A detailed investigation was conducted on the crack propagation and failure mode at the bonding interface of concrete, and the normal and tangential cohesive zone constitutive models of the bonding interface were clarified. A simplified model of a 6-segments prefabricated wind turbine hybrid tower was established based on the cohesive constitutive zone model obtained from experiments, the bearing capacity of prefabricated towers under pure torsion and bending-torsion load cases was studied, the influence of vertical joint structural adhesive on the bearing capacity of prefabricated hybrid tower was explored. The test results show that the shear failure mode of concrete-adhesive-concrete specimen is mainly the bonding interface failure, and the shear resistance performance will be weaker than that of the concrete itself, and the shear resistance will be weaker than the concrete itself. the tensile failure mode of concrete-adhesive-concrete specimen is mainly the failure of the concrete itself, and the shear resistance performance will be stronger than that of the concrete itself. Through numerical simulation calculations, it was found that compared to the friction contact model, the CZM model for vertical adhesive joints has significantly improved its torsional bearing capacity. But after the continuous loading of torque caused the failure of the vertical adhesive joints, its torsional bearing capacity remained the same as the friction contact model.

Key words

Onshore wind power / Prefabricated / Hybrid tower / adhesive joint / Cohesive zone model / Mathematical constitutive model / Torsional bearing capacity

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HUANG Cirong1, 2, ZHANG Dongliang1, 2, FU Kun1, 2, LI Tianhao1, 2, HE Lan1, 2, ZHANG Jiawei1, 2. Research on cohesive zone constitutive model of adhesive joint in prefabricated wind turbine hybrid tower and the bearing capacity of tower[J]. Journal of Vibration and Shock, 2025, 44(4): 71-81

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