剪刀撑水泥砂浆网薄层加固砌体墙刚度退化特性研究

Study on the stiffness attenuation characteristics of masonry wall strengthened with X-brace ferrocement laminate

为了解剪刀撑水泥砂浆网薄层加固砌体墙的刚度退化特性,探索剪刀撑水泥砂浆网薄层加固法的适用条件,对6片砂浆强度不同、加固方法不同的墙体试件进行拟静力试验。试验结果表明,砌体墙双面加固较单面加固的初始刚度有明显提高;各加固墙体试件的刚度衰减较快;单面剪刀撑水泥砂浆网薄层加固法宜针对砂浆强度较低的砌体墙加固,双面剪刀撑水泥砂浆网薄层加固法适宜针对砂浆强度正常或较高的砌体墙加固。给出的试验分析结果和建议可供工程设计参考。

In order to understand the stiffness attenuation characteristics of masonry wall strengthened with X-brace ferrocement laminate,designed 6 masonry wall specimen with different mortar and different strengthening method,the quasi-static test to the specimen were carried out.The test proves that the initial stiffness of double surface reinforced specimen is significantly improved than the single surface reinforced specimen;the stiffness degradation of specimen is significant;the wall has low mortar strength should be single surface reinforced with X-brace ferrocement laminate; the wall has normal or higher mortar strength should be double surface reinforced with X-brace ferrocement laminate.