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首页> 美国政府科技报告 >Preliminary Study to Develop a Data Acquistion System to Monitor Strains at theBottom Layers of Flexible Pavement Structures in Rhode Island. Estimation of Layer Coefficients for Design of Flexible Pavement Structures in Rhode Island
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Preliminary Study to Develop a Data Acquistion System to Monitor Strains at theBottom Layers of Flexible Pavement Structures in Rhode Island. Estimation of Layer Coefficients for Design of Flexible Pavement Structures in Rhode Island

机译：罗德岛柔性路面结构底层应变数据采集系统的初步研究。罗德岛柔性路面结构设计层系数的估算

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This report contains a summary of the instrumentation setup present at theUniversity of Rhode Island. Pavement instrumentation is a very powerful tool in the hand of a researcher dealing with prediction of pavement response, since it is very difficult to simulate the field conditions as regards to boundary conditions and traffic flow in the laboratory situations. It is also very difficult to incorporate these conditions in computer models. The existing instrumentation setup was established to monitor strains at the bottom of the bound layer of a flexible pavement structure. A computer program was developed to graphically represent strains in the field as the load traverses the path over the strain gages. The setup was first validated in the laboratory using a steel bar. Tests were carried out for different boundary conditions. Field tests were performed to evaluate for repeatability of the strain gauges. Field testing included loading using a loaded truck as well as a Falling Weight Deflectometer (FWD). The results of these tests compared favorably with results obtained from ELSYM5, a computer program used to predict the strains at the bottom of the bound layers.

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