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为构建灰岩在循环冲击荷载作用下的累积损伤本构模型，本文通过分离式霍普金森压杆试验对灰岩进行了不同冲击气压作用下的循环冲击试验，提出了灰岩累积损伤演化曲线，并进行了拟合和验证。在此基础上，结合应变等效原理和统计损伤理论，推导了损伤体的本构方程并进行验证。结果表明：随着冲击次数增加，灰岩试样的反射能整体呈快速上升-缓慢上升-快速上升的趋势；透射能总体呈下降趋势；吸收能总体呈上升趋势。所构建的累计损伤本构模型与试验曲线拟合的决定系数超过0.98，且参数变化符合试验的变化趋势，能较好地反映试验过程中试样的累积损伤演化情况。
Abstract：In order to construct the cumulative damage constitutive model of limestone under cyclic impact load, the cyclic impact test of limestone under different impact pressures was carried out in this paper by using the split Hopkinson pressure bar test device. The cumulative damage evolution curve of limestone was proposed, fitted, and verified. On this basis, the constitutive equation of the damaged body was derived by combining the strain equivalence principle and the statistical damage theory, and the constructed constitutive model was verified. The results show that as the number of impacts increases, the overall trend of reflected energy in limestone samples exhibits a rapid increaseslow increase-rapid increase pattern. The transmitted energy generally shows a downward trend, and the absorbed energy generally shows an upward trend. The constructed cumulative damage constitutive model has a determination coefficient of over 0.98 with the experimental curve fitting, and the parameter variations are consistent with the experimental trends, which can better reflect the cumulative damage evolution of the samples during the test process.
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基本信息:
中图分类号:TU45
引用信息:
[1]陈霞,徐松,徐长节,等.循环荷载作用下灰岩累积损伤本构模型构建及验证[J].铁道建筑,2026,66(05):63-68.
基金信息:
国家重点研发计划(2023YFC3009400); 江西省交通运输厅科技项目(2025YB013,2024JT0002,2023JT0002)
2026-05-20
2026-05-20