基于图像处理技术的混凝土表面构造仿真

Simulation of Concrete Surface Structure Based on Image Processing Technology

为了研究桥面铺装的层间性能,从混凝土的表面构造入手,通过图像处理技术获取混凝土的表面构造信息。对灰度值影响因素的分析确定光照强度和拍摄距离,并提出构造深度模拟值的概念。利用基于Python的Abaqus参数化建模,建立混凝土桥面铺装模拟模型,并进行拉拔试验和直剪试验的仿真,比对模拟值与实测值。结果表明,无论是拉毛还是喷砂打毛随着精度的上升,构造深度模拟值也在上升。当取点精度为400时,实测构造深度和模拟的构造深度模拟值相对误差平均值最小。仿真试验的模拟值总是大于实测值,整体变化趋势保持一致,说明存在系统误差。灰色关联度分别为0.91、0.83,可见模型具有正确性。并通过仿真模拟分析了层间处理方式对拉拔强度以及剪切强度的影响。

In order to study the inter-layer performance of bridge deck pavement,the surface structure of concrete was used to obtain the surface structure information of concrete through image processing technology.The analysis of the influencing factors of gray value determined the illumination intensity and shooting distance,and the concept of construction depth simulation value was proposed.Using Python-based Abaqus parametric modeling,the concrete bridge deck pavement simulation model was established and the drawing test was carried out.And the pull-out test and direct shear test were simulated to compare the simulated value with the measured value.The results show that the simulation value of the construction depth increases with the increase of precision,whether it is pulling or sandblasting.When the point precision is 400,both relative error average of the measured construction depth and the simulated construction depth analog value are the smallest.The simulated value of the simulation test is always greater than the measured value and the overall trend is consistent,indicating that there is a systematic error.The grey correlations are 0.91 and 0.83 respectively,which means the model is correct.And the effects of interlayer treatment on drawing strength and shear strength were analyzed by simulation.