| Summary: | 碩士 === 國立成功大學 === 土木工程學系 === 103 === The precast prestressed segmental pier column of Kaohsiung Port Viaduct this thesis studying for is an Innovative Technology Engineering. For investigate the deformation behavior of the precast prestressed segmental pier column, we embedded eight strain gauges at each of the segmental pier column in 5-span unit, monitor the deformation of the concrete and compared with prognosticated. Evaluate the effective prestress of the segmental pier column.
The deformation of the pier column after shrinkage、prestressing、creep of concrete and relaxation of prestressing steel is almost stable. The deformation of the concrete at prestressing had generated 224 × 10-6 ~ 250 × 10-6 elastic strain, and generated
325 × 10-6~ 504 × 10-6 concrete strain, which is 1057~1413 kgf/cm2 external prestress losses, accounting for 7.4%~9.8% of the initial pretress within 800 days after prestressing. Due to the deformation of the pier column is almost stable, thermal deformation is the main affect for the change of the deformation. The average temperature change between winter and summer form a deformation of the concrete, which is 79 × 10-6 ~ 99 × 10-6 concrete strain. Also, the sunshine and the average temperature change day and night form a deformation of the concrete, which is 35 × 10-6 ~ 45 × 10-6 concrete strain.
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