1. 北京航天发射技术研究所, 北京 100076
2. 96963部队, 北京 100192
* 邮箱: 15910887757@139.com
收稿:2022-05-19,
网络出版:2024-02-06,
纸质出版:2024-01-30
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吉新博, 卢卫建, 吕琛, 等. 不同冲击载荷下典型路面结构的动态弯沉响应[J]. 兵工学报, 2024,45(1):299-311.
Xinbo JI, Weijian LU, Chen LÜ, et al. Dynamic Deflection Response of Typical Pavement Structure under Different Impact Loads[J]. Acta Armamentarii, 2024, 45(1): 299-311.
吉新博, 卢卫建, 吕琛, 等. 不同冲击载荷下典型路面结构的动态弯沉响应[J]. 兵工学报, 2024,45(1):299-311. DOI: 10.12382/bgxb.2022.0413.
Xinbo JI, Weijian LU, Chen LÜ, et al. Dynamic Deflection Response of Typical Pavement Structure under Different Impact Loads[J]. Acta Armamentarii, 2024, 45(1): 299-311. DOI: 10.12382/bgxb.2022.0413.
为研究不同冲击载荷下典型路面结构的动态弯沉响应数值规律
开展试验勘测等级公路信息
分析实测数据并归纳出等级公路承载能力与路面结构的相关关系
基于统计规律构建了承载力维度下的典型路面结构。建立包含塑性损伤的多层连续道路结构模型
通过比对仿真结果与试验数据验证模型的有效性
研究模型大小对不同冲击载荷作用下路面弯沉仿真结果的影响。开展不同冲击载荷下典型路面结构的弯沉响应规律研究
计算出冲击载荷作用下路面峰值沉降与残余沉降数值
揭示不同冲击载荷下典型路面结构弯沉响应内在规律。研究结果表明:包含塑性损伤的多层连续道路结构模型能够准确反映冲击载荷下路面真实动态弯沉响应;不同冲击载荷下
路面沉降中塑性沉降量占比与冲击载荷幅值满足双指数方程;百吨级范围内
路面沉降中弹性回弹部分随冲击载荷幅值增大而增大
塑性沉降部分与载荷幅值呈指数正相关关系;百吨级以上
路面沉降中弹性回弹量达到上限1.2~1.3mm
路面塑性沉降量与载荷幅值呈线性关系。开展的不同冲击载荷下模型大小对仿真结果的影响规律研究可为有限元仿真中确定合适的仿真模型尺度提供参考。
In order to study the numerical law of dynamic deflection response of typical pavement structure under different impact loads
the grade highway information is experimentally surveyed
the measured data is analyzed
the correlation between grade highway bearing capacity and pavement structure is summarized
and the typical pavement structure under the dimension of bearing capacity is constructed based on the statistical law. And then a multi-layer continuous road structure model including plastic damage is established. The effectiveness of the model is verified by comparing the simulation results with the experimental data
and the influence of the size of the model on the simulation results of pavement deflection under different impact loads is studied. Finally
the deflection response law of typical pavement structure under different impact loads is studied
the peak settlement and residual settlement of pavement under impact load are calculated
and the internal law of deflection response of typical pavement structure under different impact loads is revealed. The result shows that the multi-layer continuous road structure model including plastic damage can accurately reflect the real dynamic deflection response of pavement under impact load; under different impact loads
the proportion of plastic settlement in pavement settlement and the amplitude of impact load meet the double exponential equation; in the range of 100 tons
the elastic rebound part of pavement settlement increases with the increase of impact load amplitude
and the plastic settlement part has an exponential positive correlation with load amplitude; the elastic rebound in pavement settlement reaches the upper limit of 1.2-1.3mm above 100 tons
the plastic settlement of pavement has a linear relationship with the load amplitude. In addition
the research on the influence of model size on simulation results under different impact loads can provide a reference for determining the appropriate size of simulation model in finite element simulation.
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