砌体结构应变监测中树木对太阳辐射的遮挡效应研究OA

In recent years,in order to effectively deal with the occurrence of old house safety accidents,online health monitoring systems have been used more for house safety monitoring.At present,monitoring data is often disturbed by environmental factors and cannot accurately reflect the actual condition of the house.In order to accurately obtain the health monitoring data of old houses,this paper focuses on the impact of the shading effect of trees on solar radiation on the strain monitoring results of masonry structure houses.Firstly,through the comparative analysis of the monitoring data,the important influence of tree shading on the structural strain monitoring data is confirmed,and the finite element software COMSOL is used to simulate the structural strain change affected by temperature,which further verifies the conclusion.Then,the location,shape and impact time of tree shading were studied,and the actual effect of radiation attenuation on the monitoring data was quantitatively calculated.Finally,an analysis model considering the occlusion effect is established based on Python,and the effectiveness of the model is verified by comparing the results with the finite element model.The results indicate that the temperature at the shaded measurement points,after correction,is higher than that at the unshaded points,with a maximum difference of 7.5℃.Concurrently,the micro-strain difference reaches up to 21.6×10-6.The analysis methods and means in this paper can be used to calculate the tree shading effect in the strain monitoring of masonry buildings in different regions,and provide reference for the analysis of similar situations in housing health monitoring.