GFRP复合材料加固带壁柱砖墙抗震性能试验研究

对玻璃纤维复合材料(Glass Fiber Reinforced Polymer,GFRP)加固带壁柱砖墙抗震性能进行试验研究。通过1片未加固带壁柱砖墙和8片GFRP加固带壁柱砖墙在低周往复荷载作用下的抗震性能试验,阐述了各试件的破坏特征;研究GFRP加固前后墙体的滞回特性、刚度及退化特性、变形性能、耗能性能等变化规律,以及加固方式、加固量和“对拉”锚固措施对加固效果的影响。研究结果表明:加固方式对墙体的刚度退化性能和变形性能影响不大,但对墙体的耗能性能影响较明显;按照本文提出的加固方式粘贴GFRP能够有效地提高墙体的极限荷载、减缓墙体的刚度退化、增强其变形能力和耗能能力;同时考虑采用混合加固方式、增大加固量、采用锚固措施三因素时,墙体的抗震性能较好。

An experimental study on the seismic performance of brick masonry walls with pilaster reinforced by GFRP

An experimental research is conducted on the seismic performance of brick masonry walls with pilaster reinforced by glass fiber reinforced polymer(GFRP).Based on the low cyclic loading experiments on one brick masonry wall with ordinary pilaster and eight specimens of masonry walls with pilaster strengthened by GFRP,the failure characteristics of the walls are explained;seismic performance characteristics,such as resilience,rigidity and its degeneration,deformation,and energy dissipation are studied;and influence of the measures including strengthening means,reinforcement area proportion between GFRP and wall surface,"through-wall"anchorage on reinforcement effects are studied.The test results indicate that the strengthening mode has little influence on wall deformation,wall rigidity and its degeneration,whereas it has obvious influence on the energy dissipation capacity of the wall.The ultimate capacity,deformation and energy dissipation of the walls reinforced by glass fiber sheets are remarkably higher.Wall with CFRP reinforced pilaster will show a better seismic performance when coupled with other various strengthening means,higher reinforcement proportion and"through-wall"anchorage.