Research on Foundation Bolting Performance of the Heavy-duty Machine Tool Induced by Concrete Creep

doi:10.3901/JME.2025.19.263

Abstract

Abstract: Foundation bolting performance is an important link that affects the accuracy maintenance of the heavy-duty machine tool. Uneven settlement of the concrete foundation under hundred-ton load for a long time lead to the deterioration of foundation bolting performance. To reveal that the degradation law of foundation bolting performance of the heavy-duty machine tool induced by concrete creep, based on the effective modulus method of age adjustment, a concrete creep model with aging coefficient is proposed and verified by foundation settlement experiments. Deriving the stress relaxation equation of foundation creep, combined with Boltzmann linear superposition principle and bolt tightening torque equation, a reduced-order model of the bolted joint stiffness with time-varying effect is established, which reveals the influence law of time, concrete grade and loading age on foundation bolting performance, clarifies the degradation behavior of foundation bolting performance, and effectively solves the scientific problem of foundation bolting performance prediction and evaluation during the service of the heavy-duty machine tool.

Key words: heavy-duty machine tool, bolting performance, concrete foundation, creep

CLC Number:

TG156

JIANG Kai, LIU Zhifeng, CHEN Chuanhai, ZHANG Tao. Research on Foundation Bolting Performance of the Heavy-duty Machine Tool Induced by Concrete Creep[J]. Journal of Mechanical Engineering, 2025, 61(19): 263-272.

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