光纤传感技术在高强钢绞线加固砖墙体试验中的应用研究

进行了5片采用高强钢绞线-聚合物砂浆面层加固的墙体和1片未加固的对比墙体的低周反复荷载试验,比较了5种不同加固方案的破坏形态、延性和刚度退化等抗震性能.通过在加固墙体的钢绞线网上布设分布式光纤传感器来测得试件在各主要工况下其内部钢绞线的应变分布规律.研究结果表明:采用该种加固方法可以有效地提高既有低强度砖墙体的抗震性能.钢绞线应变分布规律与该类受力状态下的墙体应变分布一致,采用该技术可以更好的得到钢纹线应变分布情况及其在墙体加固中发挥的效率.

Experimental Study Using Distributed Optical Fiber Sensor on Existing Brick Walls Strengthened with High-strength Steel Wire Mesh and Polymer Mortar

Five masonry walls strengthened with high-strength steel wire mesh and polymer mortar and one comparative model without strengthening are tested under reversed cyclic loading to study the effect of seismic retrofit.Comparisons of ductility,failure mode,and stiffness degradation of strengthened and comparative models show the beneficial effects of the wire mesh mortar.By laying distributed optical fiber sensor,the strain distribution law of the steel wire mesh and the polymer mortar face-layer under main working conditions are got.Results show this method can effectively improve seismic behavior of existing brick walls with lower capacity.The strain distribution law of the steel wire is agreement with that of the polymer mortar face-layer.The strain distribution law of the steel wire and its efficiency in reinforcement can be got by using distributed optical fiber sensor.