灌浆与钢箍加固震损砖墙的抗震性能试验研究

为准确评价汶川地震中地震损伤砖石古塔砌体墙在加固修复后的抗震性能,试验研究了灌浆与钢箍复合加固震损砌体墙筒试验模型的相关抗震性能参数.以四川某震损古砖塔为样本,研制了四种单层砌体墙筒初始试件,模拟地震作用使其破坏,采用灌浆与钢箍进行加固修复,制作所需试件,通过低周反复荷载试验,得到了试件的相关数据.试验结果表明：与未损伤的原结构相比,灌浆与钢围箍复合加固可提高震损砖砌体结构的延性与耗能能力,但对提高震损结构刚度的贡献不大,修复结构的开裂荷载亦有所降低.

Experimental Investigation on the Aseismic Behavior of Seismic Damage Masonry Wall Retrofitted with Grouting and Steel Hoops

In order to accurately evaluate the aseismic behavior of the seismic damaged masonry pagodas destroyed by Wenchuan earthquake and strengthened after the earthquake, a test was conducted to acquire related parameters on seismic performance from the specimens made by masonry and retrofitted with grouting and steel hoops. Taking a seismic damaged ancient masonry pagoda in Sichuan as a case study, four kinds of primitive specimens are fabricated by simulating the conformation of the masonry pagoda. Then the primitive specimens are destroyed under cycle loads and the damaged specimens are repaired by grouting and steel hoops. Cycle controlling tests are conducted with the specimens and relevant data are acquired. Experimental results showed that grouting combined with steel hoops could improve the ductility and energy dissipation capacity of a seismic damage of brick masonry structure, but it do a little to improve the stiffness of a seismic damage structure. And the cracking load of the repaired masonry is much lower than the original undamaged structure.