玄武岩纤维加固震损砌体结构振动台试验研究

地震震害调查表明，砌体结构因抗震性能较差，在地震中更易遭受破坏。玄武岩纤维（BFRP）具有良好的物理、力学性能，且价格低廉，但其在震后受损结构加固中却未得到广泛使用。通过对一栋缩尺比为1:4的三层砌体结构模型预震损及其震损后玄武岩纤维加固的两次振动台试验，对比分析了两次模型试验的动力特性、地震反应和损伤破坏情况，旨在验证玄武岩纤维加固震损砌体的有效性。试验结果表明，玄武岩纤维加固法可以改善砌体的脆性，延缓墙体裂缝的发展，提高结构的整体性和整体刚度，改善结构的耗能能力，使震损加固砌体结构达到甚至超过未震损结构的抗震性能，且不改变原结构质量，是一种非常有效的震损砌体结构加固方法。

Shaking table test of earthquake-damaged masonry structure strengthened with BFRP

The earthquake investigation shows that masonry buildings are prone to severe damage or even collapse due to their seismic vulnerability. BFRP has excellent physical and mechanical properties as well as its low cost, but it isn’t widely used in the strengthening of earthquake-damaged structures. Based on the shaking table tests of pre-damaged model (1:4 scaled three-storeyed masonry structure model) and earthquake-damaged model strengthened with BFRP, the validity of strengthening with BFRP on earthquake-damaged masonry structure was verified through contrasting and analyzing the dynamic characteristics, seismic response and damage of models in each test. The experimental results show that this strengthening technique without changing the structure weight can not only ameliorate the brittleness of masonry and delay the crack development in the wall, but also increase the structural integrity and stiffness and improve the ductility and the energy dissipation capacity. The seismic performance of earthquake-damaged masonry structure after reinforcement can reach or even exceed that of the undamaged structure, which proves the highly effective of strengthening with BFRP on earthquake-damaged masonry structures.