钢筋-砂浆面层交叉条带法加固砌体结构振动台试验研究

Shaking table test study on masonry structure reinforced by using steel bar-mortar layer crossed strip method

钢筋-砂浆面层交叉条带法是一种具有独特受力机理的砌体结构加固新方法,具有施工快、影响范围小的优点。根据典型的砌体结构计算结果设计试验缩尺模型,对加固与未加固模型进行多种工况下的振动台同台试验,分析模型在不同加速度幅值输入时的动力特性和破坏机制,研究钢筋-砂浆面层交叉条带法加固砌体结构的整体抗震性能。试验结果对比分析表明:设置钢筋-砂浆面层交叉条带可以有效地提高砌体结构抗震能力;钢筋-砂浆面层可以同时增加墙体的承载能力和延性;底层窗间墙是砌体结构的薄弱部位;大震作用下砌体结构顶层比底层具有更好的变形能力。

Steel bar-mortar layer crossed strip method is a new method of strengthening masonry structure with unique force mechanism,which has the advantages of fast construction and small influence range.According to the calculation results of typical masonry structure,the test scale model was designed.The vibration table of the reinforced and unreinforced models under the different working conditions was tested on the same stage.The dynamic characteristics and failure mechanism of the models under different acceleration amplitude input were analyzed.The overall seismic performance of the masonry structure reinforced by using the steel bar-mortar layer crossed strip method was studied.The comparative analysis of the test results shows that setting the steel bar-mortar layer crossed strip can effectively improve the seismic capacity of the masonry structure.The steel bar-mortar layer can simultaneously increase the bearing capacity and ductility of the wall.The bottom window wall is the weak part of the masonry structure.The top layer of the masonry structure has better deformation ability than the bottom layer under the action of large earthquakes.