Abstract
To study the in-situ response and performance of asphalt pavement, instrumenting pavement with a variety of sensors has become one of the most important tools in the field or accelerated load facilities. In the dynamic response collection process, engineers are more concerned with the load position strain of the pavement structure due to wheel wander. This paper proposes a method to obtain the load position and the strain at the load position when there is no lateral-axis positioning system based on multilayer elastic theory. The test section was paved in the field with installed strain sensors to verify and apply the proposed method. The verification results showed that both the calculated load position and load position strain matched the measured values with an absolute difference range of 5–60 mm, 0.5–2.5 με, respectively. The application results showed that the strain at the load position calculated by the proposed method had a good correlation with the temperature, as expected.
Highlights
Method to Obtain Load PositionIn the past two decades, measuring the dynamic strains of asphalt pavement structures has gradually become one of the most important means to evaluate the performance of a pavement and validate pavement distress models from a mechanistic viewpoint [1,2]
It should be noted that the strain at the load one-way analysis of variance showed there was no significant difference between the three position cannot be calculated by the measured offset in practice, because the pavement strain acquisition methods (Table 5)
This paper proposed a mechanistic method that can help obtain load position strain at the bottom of asphalt layer in instrumented pavement when the lateral axis position system is not installed
Summary
Method to Obtain Load PositionIn the past two decades, measuring the dynamic strains of asphalt pavement structures has gradually become one of the most important means to evaluate the performance of a pavement and validate pavement distress models from a mechanistic viewpoint [1,2]. N. and Singh, D. conducted a study to better understand the cause of pavement failure under actual traffic loading and environmental conditions in an instrumented test section on I-35 in McClain County [6]. It can be seen from the above, to measure dynamic strains in the field, it is necessary to install sensors in the pavement. When using these strains from the sensors to evaluate the pavement performance, one factor that must be taken into account is whether the wheel of the vehicle passes directly above the sensor. Engineers are most concerned with the strain at the load position, i.e., the maximum strain that could primarily cause pavement deterioration
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