| Summary: | 碩士 === 國立屏東科技大學 === 土木工程系碩士班 === 95 === The maximum jacking load, stress and strain behavior of polymer concrete pipes under axial jack load with different de-alignment angles at joint was studied using a commercial finite element program ANSYS in the study. 300mm, 400mm, and 500mm thick wall PRCP jacking pipes according to CNS 14814 standard were used in the study. Compressive strength of 882.9 kPa, elastic modulus of 11.9 GPa, and Passion’s ratio of 0.32, obtained from previous study were used. Solid65 and solid185 elements were used to model the polymer concrete and rubber pad. Conta174 and Targe170 elements were modeled the behavior at the interface between polymer concrete and rubber materials.
The results of the analyses indicated that the nonlinear stress strain behavior of polymer concrete under compression load can be simulated using ANSYS with selecting appropriate parameters. The maximum jacking load decreased as the increasing of the de-alignment angle at joint. The highest compression stress and cracks under the maximum jacking load condition were located near the contact surface at the de-alignment joint. The maximum jacking load approximately linear decreased as increasing the de-alignment angle. For the analyzed 300mm PRC pipe, the maximum compressive jacking load for a 2% de-alignment angle is only about 73.7% of that for perfect aligned pipe. The ratio of reduction loads were 69.0% and 67.4% for 400mm and 500mm pipes under 2% de-alignment angle, respectively.
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