Chained Analysis of Effective Prestress for Long-Span PC Bridge: Identification, Simulation and Prediction

摘要: In order to make much detail and more practical evaluation on structural safety durability for long-span PC bridges, the condition prestressing reservation in service stage turns out be a necessary key index. For sake of measuring it exactly, an invented instrument named Stretching Force Tester is applied monitor effective force strand. The precision this technology guaranteed by means amending analogous boundary minimizing test errors through tool double-stage differences. Based comparatively sophisticated loss method current code, model attenuation prestress built up. By obtained stress datum strand, recognition two types nominal coefficients losses realized regularities distribution can simulated simultaneously. experimental results large-scale beam show that relative error cable tension between value standard one able meet needs engineering use general principle demonstrated. Therefore, laid foundation inspection deterioration existing bridges.