格构式钢板加固砖砌体墙试验

目的研究格构式钢板加固砖砌体墙的抗震性能，找到改善砌体墙抗震性能的加固方法．方法制作1片未加固墙体模型和3片格构式钢板加固墙体模型，采用拟静力试验方法，对这4片墙体进行低周往复荷载作用下的试验，分别对墙体加固前后的破坏过程、承载力、变形，延性性能、滞回曲线和刚度退化曲线进行对比分析，并对比较分析不同的加固方案，应用有限元法模拟墙体的受力形式和墙项的荷载位移曲线．结果格构式钢板加固墙体的抗侧承载力可提高150％左右，抗震性能得到显著改善，带斜撑格构式钢板加固砌体墙的抗震性能最优越，有限元模拟结果与试验结果基本吻合．结论加固墙体的滞回环相对饱满，耗能能力明显增强，加固墙体的刚度得到很大提高，刚度退化变得缓慢，具有良好的耗能能力．格构式钢板加固方法是一种有效的加固方法．

Experimental Study on Masonry Wall Reinforced with Lattice Steel Plates

Abstract：To improve seismic behavior of wall, brick masonry walls reinforced with lattice type steel plates were experimentally studied in this paper. Using the quasi-static test method and finite element method, four specimens of the walls were tested and calculated under low cyclic loads. Damage processes, bearing capaci- ties, deformations, ductility performance hysteresis curves and stiffness degradation curves of unreinforced and reinforced walls were analyzed, respectively. Different reinforcing methods were also compared with each other. The results show that, compared with the unreinforced one, the bearing capacity of the brick ma- sonry walls reinforced with lattice steel plates can be increased to 150% and seismic behavior can be im- proved efficiently. It is founded that the seismic performance of the masonry wall reinforced with a bracing type of lattice steel plates is superior to others. It indicates that the wall reinforced with lattice steel plates has full hysteretic loop, large energy dissipation, slow stiffness degradation, good ductility and desirable seismic behavior.