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美国政府科技报告
>Monitoring of Prestressed Concrete Pressure Vessels. 1. An Overview of Concrete Embedment Strain Instrumentation and Calibration Test Results for Selected Concrete Embedment Strain Meters
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Monitoring of Prestressed Concrete Pressure Vessels. 1. An Overview of Concrete Embedment Strain Instrumentation and Calibration Test Results for Selected Concrete Embedment Strain Meters
The report presents results of calibration tests on strain meters. The approach was divided into two phases: (1) an overview of meter performance criteria for PCPV applications and techniques for strain measurements in concrete and (2) procurement of commercially available gages and their evaluation to assess the reliability of manufacturer-supplied calibration factors. Calibration test results for gages embedded in 15.2-cm-diam by 54-cm cylindrical concrete specimens indicated that calibration factors should be determined (verified) by embedding samples of the gages in test specimens fabricated using a representative mix and that further research should be conducted on other measurement techniques based on inductance, capacitance, semiconductors, and fluidic principles. (ERA citation 03:044761)
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