膨胀混凝土在大偏心受压构件加固中的消压卸荷作用试验研究

The experimental study on loading-bearing capacity of large eccentricity column consolidated with expansion concrete

大偏心受压构件的普通混凝土加固试验研究发现 ,加固混凝土存在应变滞后现象。这种现象的存在不利于充分发挥材料潜能 ,并且使截面最终呈现脆性破坏特征。将膨胀混凝土应用于大偏心受压构件的加固过程中 ,试验显示加固膨胀混凝土有明显的消压卸荷作用 ,可以缩小新、旧两部分混凝土的应变差 ,从而使应变滞后减弱或消除 ;使加固截面的破坏形态呈延性破坏趋势。

It has been found that there are lagging stains exist in reinforced large eccentricity members consolidated with general concrete.The phenomenon is harm to full elaborate of material latent capacity and makes the section occur brittle failure code. Based on experimental study of expanding concrete applying in reinforcing process,the obvious unloading action of reinforced expansion concrete is discovered in this paper.It is proved that this way can reduce or eliminate the lagging stains of reinforced concrete.Thus the reinforced section should be present ductility failure tendency.