Abstract:
The major structural ancient place situated in Ayuttaya was built with Ayuttaya masonry bricks without any reinforcement. In this research, appropriate repairs using additional compressive reinforcement of Glass Fiber Reinforced Polymer (GFRP) was originated. Particular consideration has been given to research into six masonry brick walls with the following dimension: 1.20 meter in height, 1.54 meter in width and 0.63 meter in depth. Two walls were built without retrofitted with GFRP, two walls were retrofitted with GFRP, and the other walls were repaired and subsequently retrofitted with GFRP prior loading. Only axial compressive loads were applied at the top surface of the ancient masonry walls. Cracks, strain and displacements in both height and width were observed. The maximum compressive load for each wall was determined, compared and verified using finite element-analysis model.
Following the review of test results of the corresponding brick and mortar, it was discovered that the mechanical properties are almost corresponding to the masonry bricks substituted. The information given from six-wall tests was as follows: Wall without retrofitted with GFRP was noted at the maximum compressive load of 84.27 tons, and the vertical displacement of 5.21mm. Wall retrofitted with GFRP was noted at the maximum compressive load of 148 tons, and the vertical displacement of 8.03mm. Wall repaired and subsequently retrofitted with GFRP was noted at the maximum compressive load of 148 tons, and the vertical displacement of 6.30mm. These results demonstrated that the compressive strength of walls retrofitted with GFRP is higher than that of walls without retrofitting. It was also noted that the axial compressive strengths of the walls repaired after damaged were almost identical to wall retrofitted with GFRP before damaged. To ensure the accuracy of the testing methodology, the mechanical properties for the corresponding walls were analyzed by means of the finite element models. The results were almost identical to the results from the full scale test. These results demonstrate an encouraging advantage for this
methodology and urge the adoption of the finite element-analysis model, which can be utilized in model mode for achieving faster results at significant lower costs.